Some system level access/metrics is restricted in iOS. Accubattery for battery measurement is not available in iOS. Not sure about the accuracy of iOS alternatives to Accubattery.

Most people are unaware that even open source projects have licenses: Permissive license, Strong Copyleft, Weak Copyleft etc.

Some resources:

1. https://web.archive.org/web/20240409042029/https://www.mend.io/blog/top-open-source-licenses-explained/
2. https://wikipedia.org/wiki/Comparison_of_free_and_open-source_software_licenses
3. https://fast.org/is-your-software-ip-really-your-ip/