If I buy #bitcoin where can I save it?

I don’t have any hardware wallet, and I want to save it for at least 10 years.

There is any good mobile app? Can I have a seed phrase I can use on several apps? Or a private key? I don’t know what’s the best but I don’t want to worry about security. If one app disappears I want to use the seed phrase on other one. Is that possible? Thank u!

#asknostr #askstr