I just wanted to congratulate you on this incredible piece of spin-doctoring:
In addition to ranking #1 for speed and frequency of updates and security patches, great to see top ranking here too. Based on your feedback, we changed our implementation on system perf mgmt when we rolled out Android Pie. Just like we promised
Er.... 7th worst in the world is not the same as best!

But well done for trying

Comments
Google is building a wall around the garden to compete with Apple for business and government use. There will be further restrictions what indie developers (sic) are allowed to do in future Android versions.
Serious developers make sure their stuff works in Samsung phones, despite the poor ranking of Samsung on the dontkillmyapp website. Hopefully without breaking the compatibility with stock Android phones.
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Hans
Hans
https://play.google.com/store/apps/details?id=com.atrainingtracker
It does use battery but there was no warning from the adaptive battery thing.
EDIT: App info > battery has it listed as running in the foreground all the time despite being minimized or closed when recording.
Hans
Rooting and messing with the system is not an option on my phone, so I don't know if the app is particularly well behaving, or if Google (or HMD) has tweaked the system to allow some Android 4 apps and their API's to run with foreground privileges in the background.
Hans