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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A much better choice in my opinion is the newer Soothing Noise Player : https://f-droid.org/en/packages/ie.delilahsthings.soothingloop/
Here's Noice in F-Droid which I stopped using after I saw it asked to make Internet connections :
https://f-droid.org/en/packages/com.github.ashutoshgngwr.noice/
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If I remember right, Noice started offering paid subscriptions to stream higher quality sound files from a central server. I just rolled back my install to the last version before that change (looks like 2.5.6) and disabled updating.
I'll have to check out soothing noise player!
Nice, thanks! The app is much easier to use than noice, yet not as beautiful. I'll check it out the next days.
Noice doesn't need internet. You can grant it to get more sounds but you don't have to.