Stackback
Solve a new sum while remembering an earlier answer.
Stackback combines arithmetic with an N-back memory challenge: solve each card, remember its answer, then answer the card from N turns ago.
Choose a 2- or 5-minute Daily Training session or climb through increasingly demanding floors. Write answers with your finger or use the keypad. Core play and handwriting recognition work on your device.
Optional Game Center leaderboards let you compare eligible Climb scores. TestFlight beta 0.5.0 (202610041156) includes sandbox purchases and optional adult-only Google sample ads. Production billing and advertising remain disabled.
Highlights
- Short Daily Training sessions and endless Climb
- On-device handwriting recognition with a keypad alternative
- Offline core play with local progress and inventory
- Open and Fair Climb with optional Game Center leaderboards