I like apps like this that expand merchants possibilities with NFC: herev1.0.1 using LNbits as backend. Tested for you below, it just works!

1. Sign up for an account at https://lacispa.me as Boss
2. Create your Access Control List from https://lachispa.me/account
3. Make sure to link a API Token
4. Download the app
5. Login as Boss
6. From Settings, scan Admin key QR

Well done Boss! Now let's set your Employees:

1. Ask them to download the app or provide a device that has it installed already
2. Login as Employee (only need a name - no password)
3. From settings, scan Invoice/read key: 07f23a2f321e430a9c668d177b0de4cb

Well done Employee! Now you are all set to receive sats for your Boss. Create your first invoice:

New featuresNew features

• Payment with NFC for BoltCard cards
• The customer can pay by bringing their NFC card closer to the POS
• Integration with BoltCard LNURLw in LNBits

ChangesChanges

• Improved charging flow: QR, copy and pay options with NFC
• Better BoltCard server error handling

DownloadsDownloads

• arm64-v8a: For modern 64-bit mobiles
• armeabi-v7a: For 32-bit mobiles
• x86_64: For emulators/PC