CPU and RAM usage statistics for iPhone/iOS (similar to Activity Monitor)? Is there any (preferably free) way to view CPU and RAM usage by process (e.g. app) on iPhone without jailbreaking the device?
Activity Monitor on macOS displays

Process Name
% CPU (per core I believe)
CPU Time
Threads

and some other CPU statistics, as well as these RAM statistics:

Process Name
Memory (GB)
Threads

It would be great to know how to view similar statistics on iPhone.
I use CPU-x Dasher for this. It displays :

CPU usage, frequency time
RAM usage (free/used/reserved…)
Benchmark took (not that much features but it’s still a benchmark)
Networks/Sensors data
And all of this can be integrated on a widget

It’s still limited compared to some Android apps and it has a lot of ads but it’s the best I could find yet.