Cheers! I do use A. from time to time. However:
I dont find any options to customize feeds?
Zapping only works with separate lightning app?
Minimum Zap is 100sats?
I havent found my way around it yet, I guess.
Try Amethyst
https://github.com/vitorpamplona/amethyst
Or Yakihonne
https://play.google.com/store/apps/details?id=com.yakihonne.yakihonne
Both are great choices for Android.
Either of these apps support using Amber, an app that lets you keep your Nostr keys safe. Primal doesn't.
Discussion
Long press the zap icon. It supports NWC and you can set whatever amounts you want 🤙