I have downloaded the Battery Monitor from the repo since l felt that such an app would be useful for telling me about the longevity of my battery throughout the day. I have been using this device since 2021.
However, l feel that the until drained section is not showing me the exact timing. How do I get in touch with the creator of this app if l feel the need to ?
In F-Droid client, on the app page, expand Links, touch Issue tracker
Same for website…
Of course it does not, because the remaining time depends on how much you use the battery. The app can possibly estimate remaining time based on past usage, but it is impossible for any tool, gadget, or device to accurately predict the future.
Hi, Battery Monitor’s current maintainer / creator here. Thanks for using the app 
Timing gets better the longer you use the app when it can get further details on how you use the device. However, if timing still doesn’t satisfy you after using the app for some time, you can change how the app estimates it. Go to Settings → Other Settings → Estimate Type and try different options.
As for getting in touch with me, I prefer GitHub (Discussions for questions, Issues for raising bugs or feature ideas). However, if you don’t have an account, or prefer direct contact, you can find my e-mail on F-Droid or in the app’s help.