Twinbox

Your messages are personal. Keep the private ones private.

Twinbox is an SMS & MMS messenger with a private Safebox hidden behind a working calculator.

Use your Inbox normally, then move selected conversations to Safebox. Future messages from those senders can go directly to Safebox instead of appearing in your regular Inbox.

To anyone else, Twinbox works like a normal calculator. Enter your secret code and press = to open the messenger.

PRIVATE SMS, HIDDEN IN PLAIN SIGHT
Keep selected conversations away from your regular Inbox and access them when you choose.

SAFEBOX
Move private conversations into Safebox and protect them with your PIN or fingerprint. Once a sender is in Safebox, future messages from that sender can be routed there automatically.

WORKING CALCULATOR
Twinbox opens as a real, usable calculator. Enter your private code and press = to reveal the messenger.

PIN & BIOMETRIC PROTECTION
Add another layer of protection to Safebox with your PIN or supported biometric authentication.

SMS & MMS
Twinbox is also your everyday SMS & MMS app, with a clean Inbox for normal conversations.

SMART BIN
Move unwanted senders to the Bin. Future messages from them can be routed there automatically, keeping your Inbox cleaner.

Twinbox includes:
• SMS & MMS messaging
• Private Safebox
• Working calculator disguise
• Secret-code access
• PIN protection
• Fingerprint / biometric unlock
• Automatic Safebox routing
• Automatic Bin routing

Twinbox — private SMS, hidden in plain sight.

Recent changes:
Long-press a message to Copy, Forward, or Delete. Improved message delete and MMS.