Hello! Im From Mexico and bike computers can get expensive here so i made my own as a webapp, i use it on a really old iphone se 2nd gen and it last more than 5 hours of continue usage, it was build to consume very little battery and data as it has turn by turn map guidance, auto pause, you can download gpx data after the ride as it auto saves it, it has multi language english and spanish, its free to use enjoy. if you use it please leave me a review!

https://unsimplegps.com/