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There are extremely useful utilities like iStats for viewing the CPU temperature on a device running macOS.

Is there a way to view the current CPU temperature of an iPhone?

Note: the reason I want this info is because an app I regularly use runs some very heavy processes which heat up the phone to very hot temperatures in around 15 minutes. I would like to be able to take the phone's temperature before and after 15 minutes of using that app.

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    Coconut Battery (and others) can read the battery temperature - but that is not what you want. I believe the answer to your question is no, unless maybe you jailbreak it (which I don't recommend!).
    – Gilby
    Apr 10 at 7:41
  • Coconut Battery didn't seem to be available for me, so I tried a bunch of similar apps (found some very interesting device statistics, like CPU usage), but none seemed to show any temperatures (neither battery nor CPU nor anything else) unfortunately. Any alternatives you can recommend? (and yep, agree, I can't jailbreak)
    – stevec
    Apr 10 at 7:56
  • What will you do with this data, when you get it? Your phone's heat will always be within operational limits.
    – benwiggy
    Oct 8 at 8:48
  • @benwiggy I needed it for a bug report for a chess app. It heated the phone up crazily quickly, and the phone (iPhone 12 pro max) became incredibly laggy. All within about five minutes of using the chess dot com app. I would have provided the devs at chess.com the exact temperature and time statistics
    – stevec
    Oct 8 at 8:50
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There's a lot of temperature information in sysdiagnose in iOS, might be a good place to start.

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