Cipher Post: Daily Cryptogram

Cipher Post is a cryptogram on a vintage postcard. Every card carries a short saying, and every letter in it has been swapped for another. Work out what each letter really is and the saying appears. A new postcard comes every day, the same one for everyone. There's a stamp album to fill as well, so there's always another card to crack. HOW IT PLAYS • Press a letter on the card and slide sideways to turn the letter wheel, then let go • Or tap a letter, then tap the wheel • Each letter you try fills in everywhere it appears on the card • The strip under the card counts how often each code letter turns up • A few letters are decoded for you to start THE STAMP ALBUM • 96 postcards on 8 sheets, from Inland to Round the world • Each card you crack earns a stamp and a postmark from its city • Collect 8 stamps on a sheet to open the next • Missed a day? The album keeps the last 14 daily postcards • 150 sayings: old proverbs and new ones in the same spirit STUCK? Pick a letter and tap Reveal to see what it really is. Crack a card without revealing anything and it's delivered first class. PICK YOUR LOOK • Airmail: a cream card with red and blue chevrons • Telegram: a sepia slip and typed strips on a walnut desk • Night mail: sorting-van blue with coral and lamp-gold No account, no sign-up. Cipher Post is free to play and supported by ads.

• After you turn the wheel, the letter stays picked, so you can turn again to change it. Tap the next blank when you're ready.