Hi. I was checking internet and many people say it's not safe to store important notes on Android.

So, I come up with an idea.

An app for android and IPhone that will keep your notes encrypted at all times.

The app will have crazy designed chatGPT algorithm that will ask a client to add special keys or phrase that will be used to decode the encryption. This keys will not be stored anywhere only by the client.

If anybody will access notes information, he will never be able to understand encryption without the keys or special phrase.

What you think? Is there anything like that exists?