Use APKPure App
Get Capricious Timer old version APK for Android
A timer which rings at a random time in the range you select.
It is a timer that sounds at a random time within the specified range.
You can't know when it rings.
If you close the app, it rings with notification! (please enable notification)
"I want to work only for a certain amount of time, but I do not want to be aware of the end time."
"I want to set a reminder that only specifies the approximate time"
Use it under such situations!