Both are awesome. 
Now that Amber has bunker support it is indispensable. I'll never have to give anything else my nsec again.

Obtainium basically let's you build your own app store from GitHub. I use it for any app possible these days. 
https://i.nostr.build/nhQrnXR2DM36eagn.jpg

https://github.com/zapstore/zapstore is pretty cool too.