Do you like birds? Do you own an Android phone?
Then you should enjoy whoBIRD (https://f-droid.org/packages/org.woheller69.whobird/) by woheller69.
This wonderful open-source app identifies birds from their chirps. It's fully offline (needs to download a 55 MB model on first use) and works really well. I enjoy walking down the streets of my village while this app is running and learning to recognize birds around me.


