There is over 15 categories and over 500 free and open source apps to choose from all in one place!

I’m excited to share a project I’ve been working on over the past few months!

It’s a mobile app that turns any text into high-quality audio. Whether it’s a webpage, a Substack or Medium article, a PDF, or just copied text—it converts it into clear, natural-sounding speech. You can listen to it like a podcast or audiobook, even with the app running in the background.

The app is privacy-friendly and doesn’t request any permissions by default. It only asks for access if you choose to share files from your device for audio conversion.

You can also take or upload a photo of any text, and the app will extract and read it aloud.

- React Native (expo)
- NodeJS, react (web)
- Framer Landing

The app is called Frateca. You can find it on Google Play and the App Store. I also working on web vesion, it's already live.

Free iPhone app
Free Android app on Google Play
Free web version, works in any browser (on desktop or laptop).
Free web extension.

Thanks for your support, I’d love to hear what you think!

I'm curious to see what people are building right now.

Drop your side project name below and give me a one-line description of what it does.

I'll check out as many as I can. 👇 Check mine too🤞🏻

Hey, I'm Louis, 18. For the past while I've been building a GTA-inspired sandbox game that runs entirely in the browser, no download. It's an alpha, so it's rough in places, but it's somewhat playable.

Play it here: https://wta.lou15.com

What's in it: an old-town map, driving, and a city to wander around. Still working on more.

I built it with Opus 5.5 using Claude Code besides school, so I'd love to know what feels off, what breaks, and what you'd add next. Any feedback is welcome, even a one-liner.

https://reddit.com/link/1x70rmy/video/r7ia5jqgwpvh1/player

I have tinnitus. Every app I tried was a folder of white-noise MP3s with a timer, and none of them cared that my ringing has a specific pitch. So I built one that does. Today I shipped 2.0.0, a full redesign, so it felt like a good moment to share the numbers.

**How it works**

- **sylence.app** has a pitch test that runs in the browser: one sine oscillator and a slider. You move the tone until it sits on your ringing. Nothing is uploaded; the page's CSP is `connect-src 'none'`, so it can't phone home even if I wanted it to. Then it plays noise with a notch cut at your pitch, next to the same noise without it.

- **The Android app** (Flutter) takes that number and builds every sound on the device with a notch at your pitch (two cascaded RBJ biquads): noise colours synthesised in Dart, plus 31 real recordings (rain, fan, ocean, city, piano...) that get notched in a background isolate and layered, up to five at once. No account. Your pitch and diary stay on the phone. The only network calls are Play billing (RevenueCat, which also carries a few anonymous progress markers, each named in the privacy policy) and a promo-code check if you type one.

- The player never takes audio focus, so it sits under YouTube, podcasts and calls instead of pausing them.

**The numbers, six weeks in**

- ~330 installs; 239 still have it.

- 1 sale: Lifetime, from someone who used the free version for 13 days first. No subscriptions yet.

- About two thirds of all installs came on three days, when Facebook reels I posted by hand took off (the biggest reached 57k views). The same kind of clips posted on a schedule through the API got 0 to 5 views each.

- 57% of people who open the Play listing install. Search sends almost nobody: I'm not in the top 30 for any tinnitus keyword, and with no public rating yet I don't expect to be.

**What I'd do differently**

- Ship the browser test first. It needs nothing, so it's what people actually try, and the app converts better behind it.

- The name. "Sylence" sounds exactly like "silence", so people who hear it in a video search the wrong word. I now spell it on screen every time.

- Post by hand. Everything scheduled was close to invisible; the hand-posted reels carried the whole launch.

**Honest bit:** the evidence on notched sound is mixed. A 2010 study looked promising, the larger 2016 trial missed its main outcomes, and a 2018 Cochrane review couldn't show sound therapy in general beats a placebo. The site lays all of it out. It's masking and relief, not a treatment. Masking is free (noise plus one of rain, fan or ocean) and your first listen includes the notch; after that the notch is Pro, with a 7-day free trial on the yearly plan.

Two questions for people who've been here: how did you get your first real search traffic on Play, and how did you get your first ratings without nagging people? Happy to go into the DSP or the Flutter audio side too.

Site: https://sylence.app

Play: https://play.google.com/store/apps/details?id=com.geekbug.sylence&referrer=utm_source%3Dreddit%26utm_medium%3Dcommunity%26utm_campaign%3Dsideproject

Solo project, built nights and weekends: CLSTR reads 100k+ news articles a day from 40k+ sources, figures out which ones cover the same event, and squashes them into one item. Related events get chained into "situations" with timelines, so you can see how a story developed over weeks instead of re-reading the same headline 20 times.

A month after my last update here, two new things:

First, a map: which countries the world's newsrooms are writing about, refreshed every ten minutes, with a permanent link per hour. Right now it's 2,660 across 160 countries in the last three hours. clstr.news/world

Second, the stats at 164 days and 11,079,667 articles, measured again:

• 12:1 - articles written per thing that actually happened. Still mostly echo.
• 4 in 10 events never get a second day of coverage. Only 1.2% keep growing past day 3.
• One world leader shows up in ~84 new events every single day, more than the next five most-covered people combined.
• Only 0.08% of events rate as "exceptional". The mundane middle is where the news lives.

All the charts: clstr.news/observatory

About CLSTR: there's a free API and MCP server your agents can use (docs in clstr.news/developers)

I'm just a dad with two curious boys, aged 9 and 6, and absolutely no coding background.

A little while ago, I decided to try vibe coding using Claude Code Opus 5.5. Partly to learn something new, but mostly because I wanted to make my kids' screen time a bit more meaningful.

So I started building an interactive 3D globe where they could explore the world, discover animals, countries, landmarks, and learn a few things along the way.

Honestly, I thought I'd be lucky if they played with it for 15 minutes.
Turns out, I underestimated them.

They started exploring everything, asking questions, and then the feature requests came.
"Dad, why isn't this in the game?"
"Can you make it do this?"
"This would be SO much better if..."

So now, my two boys are basically the lead testers, and I've been adding features and fixing things based on their feedback almost every day.

It's still very much a work in progress. Plenty of bugs, missing features, and things I want to improve.

But watching them genuinely enjoy exploring the world, rather than just mindlessly staring at a screen, has been pretty rewarding.

And it got me thinking. If my kids enjoy it this much, maybe other kids would too.

So I decided to share it with everyone.

It's called My Earth Toy, and it's completely free.

https://myearthtoy.com/

You can try it without an account, or sign up for the full experience.

If you have curious little ones (physically or internally), I'd love for you to try it together. Please share your feedback; I'd appreciate hearing it.

Thank you for checking it out!

Hi everyone! I was looking at optical file transfer and saw that Decimen was rather ineffective. Firstly, it's QR-based system really seemed to be designed for paper, where binary design is necessary to prevent ink smudging. On a screen, binary is ineffecient, although luminance makes sense. I looked at a lot of research papers and eventually found this:I saw that OFDM was the logical improvement off QR codes, as it used actual signal processing and luminance instead of binary black-and-white QR. So I decided to base my system off FOCUS. For fast decoding, I also wanted it to be GPU based rather than CPU based, and to deal with frame desync well.

https://vs.inf.ethz.ch/publ/papers/soeroesg-mobisys2016-Focus.pdf After that, I stripped the FOCUS finders (the original finders were ugly and wasted a lot of space) and came up with a custom, compact ring. the ring has around 15 bits of information distributed via Reed Solomon along the giant ring. A GPU can easily decode the ring's RS it by brute forcing the maximum likelihood of each of the 32,768 codewords.

To balance between range and maximizing speed, i created 4 different ring sizes; 32, 64, 128, and 256. Initially I wanted to stick with the browser; however, the browser is woefully inefficient in webcam tuning. After maxing the settings, we were still at 700 KB/s; better than Decimen but hardly a knockout blow. I couldn't switch to 60fps without it oscillating wildly between 1.3 MB/s to 0 MB/s when out of phase. So I decided to focus on a native android instead. LIZARD is a format; decoders can choose how to decode it.

A weak web decoder doesn't prevent me from making a strong native decoder; the format is the same, while a fountain code called Wirehair allows slow and fast speeds to both exist. Initially, Claude tried to port the OpenCV based finder to Vulkan. Branchy work is not great on a GPU, which struggles with warp divergence, so I scrapped that. However, AI inference is perfect for a GPU. As I had an RTX 4090, I asked it to make a generator, open pytorch, and train a custom, 50k parameter AI finder that uses the grayscale image and finds four corners. The CPU based OpenCV finder helped create training frames solutions for the GPU, which was given high levels of noise and perspective distortion in order to make it harder to detect than phones. I kept training it till the GPU version defeated the CPU in finding accuracy. After a few hours, had fully trained a custom 3-layer CNN that found the code easily in 1.5 ms on the GPU.

Next, I faced a massive issue: camera/frame desync. This was the bane of optical camera communication, with many resarch papers trying to defeat this with barcodes. The difference between my code and a QR: half of a FOCUS image can decode, meaning that if part of another frame was captures, some of it could decode. Additionally, android's native Camera2 API allows you to defeat this problem completely. it allows you to control the delays between frames. As a result, I decided to embed pilot signals in the image. Every four frames, it cycles through these four pilots.

0 0
1 0
0 1
1 1

This created a way to estimate how much of the last frame and future frame was on it. As it had two variables and two unknown frames, it was solvable; as a result, the camera knew how far off it was each frame. Then, it was able to adjust the time accordingly, keeping the rates stable at 60FPS. Voila! I had solved the hardest problem in OCC.

Speed: 0.7→1.4-1.6 MB/s

i returned an idea that I scrapped on web due to lag; 2:1 multiplexing. there is no reason why 2 square codes wouldn't store more; 1920x960 is far better than 1080x1080 in size. The change i did that made it viable; I did not try for a complex 2:1 mode, but simply multiplexed two frames side by side; two 960x960 squares. At this point the improvement of LIZARD went smoothly.

Speed: 0.4-1.6→2.1 MB/s

There were three final levers, but they were mundane. Firstly, I disabled the ISP edge enhancement and other cosmetic optimizations that were terrible for keeping signal. Then, i made the error correction levels higher for outer frequencies and lower for inner frequencies. I also added another LDPC rate. After that, I replaced the 96-module ring with the 256-module ring. That massively increased the area of signal. I used random old school monitors and they still got a similar rate. What phone did I use? S26 ultra. 1.5x zoom . 105 degree lens. 1080p, 60fps. it seems like the lens settings were far more influential than any monitor i used.I hope you liked my system! lmk what your thoughts are.

Speed: 2.1→4.1 MB/s

Note: the high speeds only exist reliably on Android.
Try it here!: https://fosslabs.dev/

Hey everyone!

Like many of you, my family has an overflowing folder stuffed with paper prescriptions and lab reports dating back years. Every time my parents visit a doctor, we face the same three headaches:

1. Nobody can read the doctor’s scribbled handwriting.
2. The doctor asks what medicines were prescribed 6 months ago, and we have to dig through messy paper slips.
3. Keeping track of daily pill schedules (before/after meals, dosages) across multiple specialists is a mess.

I couldn't find a clean, private app that actually solved this without feeling bloated, so I spent the last few months building MedDocu(currently available in India only).

What it does:

• Decodes Doctor Handwriting: Snap a photo of a messy prescription or lab report, and it extracts the doctor's name, medicines, dosage frequency (e.g. 1-0-1), and next visit date into a clean structured checklist.
• Auto-Schedules Reminders: Generates medication alerts directly from the parsed prescription so family members don't miss doses.
• Family Profiles: Manage records for parents, kids, and yourself in one place.
• Medicine Cabinet: Shows all active vs. stopped medications at a glance.

The Tech & Privacy Architecture (For the devs here):

Because health data is sensitive, I wanted to build this properly:

• Frontend: Flutter + GetX.
• Local-First (SQLite): Works 100% offline. You can view, search, and manage your records anywhere without internet.
• Zero-Knowledge Encryption: Data is AES-256 encrypted directly on the device using a 6-digit PIN before anything syncs to the cloud (Firebase Data Connect / PostgreSQL). The raw PIN never touches our servers.
• AI Engine: Google Gemini with strict structured JSON schemas to handle cursive medical handwriting and lab test markers.

Where to try it:

• Android (Google Play): https://play.google.com/store/apps/details?id=com.knowpritam.meddocu
• iOS (App Store): https://apps.apple.com/in/app/meddocu/id6764456429
• Website: https://meddocu.in

I’m an indie developer and would genuinely appreciate your feedback on the scanning accuracy, onboarding flow, and UI.

How do you draw the line between adding every feature users ask for versus keeping the core product clean and focused? Would love to know how other early stage builders handle this .

We're three car nerds who kept losing track of the cool stuff we spotted. Camera roll full of random Ferraris and weird old Hiluxes with no way to look back at them.

So we built Burbles. You see a car, snap it, and it turns into a card in your binder with a rarity tier, from Common up to Legendary. There are daily challenges that send you out to find a specific car, and plates get blurred before anything gets shared.

It's live on iOS ("Burbles: Car Stories"). Honest feedback would mean a lot, especially what feels confusing or pointless. Happy to give anyone here a free year of Pro.

What would make you actually open an app like this every day?

I built Microrena as a by-product of getting tired of manually comparing outputs from different LLM providers. The idea is simple, configure your sources, give them a prompt, and compare their outputs directly from your terminal.

It's still an early project, and there's plenty left to improve. I mainly wanted something lightweight that fits into an existing developer workflow rather than another separate application.

I'd love feedback on the approach, especially what would make comparing models from different providers more useful.

Github: https://github.com/NeevJewalkar/microrena

Hi everyone,

I have many years of experience with bot detection, user fingerprinting and analytics, and this is the first time I've turned it into some sort of product. I'd really appreciate honest feedback.

What it does currently:

- Recognises returning visitors, Device fingerprinting
- Shows any visit and user action on a page like a video, with text inputs hidden.
- Gives every visitor a bot score, keeps bots out of your stats, and challenge suspicious ones with a custom captcha.
- Shows which visitor made each Stripe sale.
- Webhook support

Where I think it's useful:

- Conversion: watch where shoppers or new signups get stuck, and fix that step.
- Live support: see what a visitor is doing, so you can offer help.
- Fake traffic and signups: know how much of your traffic is bots, and have tools to stop them and exclude them from analytics.

You can check it out here: https://identuly.com

I'm doing this solo and I don't have much marketing experience, so I'm trying to find out if this kind of product is actually needed, is it useful? and any tips on getting it in front of the right people?

Hi, I built Handwrite because I struggle to write for extended periods of time. I have online lessons multiple times per week, which made this especially hard for me.

After using Handwrite in a lesson, I was able to do a lot more, the teacher understood my handwriting for once, and my wrist stopped hurting at the end of each lesson.

It can write in cursive too, if you need that.

You can get it for free on the Microsoft Store.

If you like it, feedback or a review would mean a lot. Thanks!

The whole thing is built around one rule: payroll is salary data, so the file should never be uploaded anywhere. It runs entirely in your browser, nothing is sent to any server, and it even works offline. That was the non-negotiable, because the people who do this are (rightly) paranoid about where that data goes.

What it does: drop in this pay period and the last one, and it flags what shouldn’t have changed. Someone terminated who’s still getting paid, a brand new name that shouldn’t be there yet, a number that jumped more than your threshold. You can also drop in a single file to catch the basic stuff (duplicate IDs, missing values, numbers that look off).

Free, no signup, no upload. I’d love blunt feedback: is it actually useful, or is it missing something obvious? Link in the comments.

Hi everyone, I'm the developer of OneMouse.

It lets you use a Windows PC's mouse and keyboard on an Android phone or tablet. Pair the devices on the same local network, arrange where the phone sits next to your monitor, and move the cursor across that screen edge. You can then click, scroll and type on the Android device while it stays on its own screen.

There's also text clipboard sharing, file transfer, and a phone-screen mirror you can open on the PC. It's aimed at people who keep a phone or tablet beside their computer and want to use their normal keyboard in mobile apps.

A Windows companion app is required, and Android's Accessibility permission is needed to receive mouse and keyboard input.

Google Play: https://play.google.com/store/apps/details?id=com.mouselink.app

If you use a tablet alongside a desktop, I'd like to hear where this would fit into your workflow.

Hi everyone,

I am an indie developer who grew up watching and playing cricket, and it was my dream to build my own cricket game.

This week, I launched a browser-based cricket game named Super Slog. It is free, and has some super fun features:

• Single, and multiplayer mode. Play with your friends. No account signup necessary. Works on both desktop and mobile!
• Customised commentary based on game updates, angry bowlers, and different types of shots (sweeps, scoops and more)
• Three types of camera views, various stadiums, day/night/evening settings and more!

Key stats (3 days):

• Global users: 220+ players
• Users in focus countries where cricket is played: 60 players, 12 mins average session duration (last two days it has climbed to 22 mins+)
• Some users are absolutely addicted: a single player played 3+ hours, and a multiplayer duo played 5 matches consecutively

I learnt a few key things that could be useful if you are building a game or app:

• As someone who specialised in releasing mobile apps and their long release cycles, I REALLY appreciate browser based games, because I can deploy instantly and get user feedback
• Associated with this, it is also super easy for users to use my product now - if I send them to an app store link, some might download, and some might not. Conversion drop-offs are real, and people often don't want to install new apps
• Having said the above two, it is harder to monetise a web game. To truly make revenue, you need to own more of the user data, remind them using push notifications and keep making them come back. Mobile apps are great for this!

If you like cricket, check out the game. I would really appreciate all your feedback, which will help me to continue improving and if you like it, would love it if you can spread the word even more. Play it here!

hi r/SideProject

i built TALIRI, a chrome extension that teaches you a language while you browse the internet daily, be it X, wikipedia, chatgpt/claude web threads, blogs, whatever. a few selected words on the page swap and get highlighted into the language youre learning right inside the sentence. hover over one and you see what it means. once you hve seen it enough times it hides the word and asks you what it means, and it remembers if you got it right or wrong. spaced repetition technique (FSRS), like ANKI cards, is the logic that decides when each word comes back

the video is one word's week: met on monday, familiar by thursday, asked on sunday

this is why i built it. my wife is half swedish half german and im tamil from india so we have zero language overlap. we talk in english of course but we are planning to have kids next year and i want to understand swedish by then. i never had time for a language app but im a software engineer, i read on my computer all day and i scroll X a lot. so i put spaced repetition inside that reading and pointed it at the most common words, around 2000 per language

i built it with claude and codex. claude was the orchestrator doing design specs UI and audits, codex was the implementer for backend and logic and every change got checked by a second model. overall 1100+ commits and 250+ browser tests in ten weeks building this. i made the calls, my wife checked the swedish and german and a friend did a field test last week that caught stuff we fixed before launch. it was a lot of fun

your reading stays on your laptop. it never sends page text, page addresses or your browsing history. once a week it checks your plan and sends your language and a few counts like words met and answers, never the words

its $7/month or $49/year which is about 5 months cheaper, with a 14 day refund. taliri.app homepage has a live demo you can try without signing up

right now its swedish, german, hindi, spanish and french and only on english websites. japanese is in progress. if you want another language or you mostly read the web in something other than english please tell me. any feedback is welcome, thanks!

I wrote a script that submits my resume to LinkedIn roles matching criteria I set. I'm considering turning it into a web app and testing a $10/month price.

Before taking it further, I'd want to understand what people would need to review before letting it submit anything. Would you want a queue you approve role by role? What should happen when the form asks a question the script can't answer confidently?

For comparison, Agent Apply and autofill workflows show another approach to reducing application work. What would a small web version of this script need to do better or make simpler for you to choose it?

Would $10/month make sense for the proposed tool, and what would make you stop trusting it? That's a price I'm considering for this idea, not a claim about the linked service's pricing.

How capturing stacks work for bug reports for example

Hey all. I've spent the last few weeks building PixNip, a native screenshot app for macOS, and I'm looking for a handful of people to beta test it before launch. (Planned launchdate is November 1st)

The idea: one shortcut for everything. Press ⇧⌘1, then a letter: A for area, W window, S scrolling capture, T to copy text, R to record, K to start a stack. No menus, no ten shortcuts to remember.

What it does:

• Instant paste. The moment you let go, the screenshot is on your clipboard. ⌘V into Slack, Mail, Notion, wherever.
• Stack mode. Take several shots in a row, annotate them all in one window, and export them as one image or a step-by-step PDF. Made for bug reports and how-tos.
• Auto-Redact. One click hides emails, phone numbers, card numbers and API keys before you share. It runs entirely on your Mac; nothing is uploaded.
• Scrolling capture, copy text from anything (OCR), Beautify for social posts, screen recording, and workflows plus a CLI if you're into automation.

It's built in Swift, needs macOS 14 or later, and it's signed, notarized and updates itself.

Site: https://pixnip.app

What I'm asking: use it as your everyday screenshot tool for a week or two, then tell me what breaks, what's confusing and what's missing. There's a 3-minute feedback form I'll send you guys. Everyone of the chosen testers who send feedback gets a free PixNip Pro license at launch.

Comment or DM me and I'll send you the beta link. Happy to answer anything about how it's built.

Always curious to see what people are working on, whether it's a small side project, a new startup, or just an idea they're experimenting with.

Drop your project name and a one-line description below 👇

I'll check out as many as I can.

Hello! I'm the developer behind Dark Roll 2. The game is a marble platformer inspired by soulslike genre, but for the ucpoming Steam Next Fest I am preparing someting special - a backrooms inspired bonus level with no real goal... One redditor's comment gave me idea to put in a ballpit, so I had to at least try to play around see how it would turn out... I can happily say I'm satisfied with the result! I specifically made the balls magically go back to the pool, so the fun is never ending!

This level along with the ball pit will be put into free demo of my game on monday as Steam Next Fest begins!

Do It For The XP turns chores into quests. A parent plays the Game Master: they write the quests ("take out the bins", "read for 20 minutes"), choose what each one pays and which ones need their OK. Each kid plays a hero. A chore shows up as a beast on a deadline clock, finishing it wins the fight, and the XP, gold and ability points they earn go toward levels, gear and shops in town.

Beyond that there are dungeons with keys and boss doors, daily streaks, a Hero Records page and a full Game Master console. The look and sound are a love letter to EarthBound, A Link to the Past and Chrono Trigger.

A few things parents tend to ask about:

- Free to try in the browser, with no account: https://app.doit.forthexp.com/

- Everything stays on your device. There's no server and nothing gets uploaded.

- Built with Vue 3, Ionic and Capacitor, so it also packages as a phone app (coming soon).

I started this by hand years ago and built it that way for most of its life. Recently I've been using AI coding agents to get it over the finish line, and it finally feels close to done.

What I'd love feedback on: does the Game Master setup make sense the first time through, and what would make you actually use this with your own kids?

Hi all,

I've been working on a side project: VIN Service Planner https://vin-service-planner.com

You enter a VIN and it shows:
- vehicle specs (model, engine)
- service intervals by mileage
- common problems for that model and engine
- parts you'll likely need

The idea came from buying used cars – I always wanted to know what a car will need in the next 20–30k miles, not just its history.

It's free, no signup. It's still in testing, so some vehicles won't return results yet – that's exactly the feedback I'm looking for.

What I'd love to know:
1. Did your VIN work? If not, what make/model/year?
2. Was the info useful or did something look wrong?
3. What would make you come back to it?

Thanks for any feedback, good or bad.