A fresh logic proof every day.
The Daily Proof changes at midnight in New York.
Quiet focus.
Real deduction.
Read the visual relationships, arrange the symbols, and prove the one order that makes every clue true.
150 included levels.
Work through Easy, Medium, and Hard collections at your own pace.
Real deduction. No countdown.
Use optional hints, undo, and an always-available clue guide.
Proofline support
Most questions can be resolved directly in the app. If you still need help, email info@wolfandducks.com.
How do I move symbols?
Drag a symbol into an open position to shift the line, or tap two symbols to swap them.
What do the clues mean?
Tap the ? button between Undo and Hints during a puzzle. The full clue guide is always available there.
How do I restore Remove Ads?
Open Settings and choose Restore purchases while signed into the Apple Account that made the purchase.
How do I reset progress?
Reset one puzzle from its result screen, a track from level selection, or everything from Settings.
How do I change privacy choices?
Use Privacy choices in Proofline Settings. Apple tracking permission can also be changed in iOS Settings.
How is puzzle data deleted?
Use Reset all puzzle progress in Settings. Deleting Proofline also removes its device-local game data.