Android provides this information natively under /sys. Exactly where depends on your version.
But if you want an app, merely searching F-Droid for "battery" produces a number of leads.
this post was submitted on 18 Feb 2024
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F-Droid is an installable catalogue of FOSS (Free and Open Source Software) applications for the Android platform. The client makes it easy to browse, install, and keep track of updates on your device.
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Theres batterybot and batterybot pro, but those dont do nearly what accubattery does. I use batterybot pro to give me notifications at 80% and 30% so i can unplug at 80 and charge at 30 to keep the cycle counr down. Since i am only charging/discharging 50% it only does half a cycle at a time and keeps it from either extreme.
In any case, I can highly recommend AccuBattery. I love how they counter bullshit from the "battery University".