Today I found a nice flow (for Amethyst, Android):
1. Chat with the @LightningTipBot on Telegram to set up a wallet there if you didn't have one, send some sats there.
2. On the @LightningTipBot chat, write: /nostr add npub1yourpubkey
3. write: /advanced
then copy your Anonymous Lightning Address to the Amethyst user config to receive zaps there
4. still in the LightningTipBot, write: /link
copy the URL below the QR code
5. install Zeus from the app store and import new node with the URL you have on the clipboard (it does it automatically)
From this point on you receive the zaps on ln.tips, zap with Zeus using your ln.tips balance, and the zap icon lights up when you zap.