Crossfold is two 6×6 number puzzles joined by one shared column. Each row, column and 2×3 box holds the digits 1 to 6 once. The amber cells belong to both boards, so a digit there has to work on both sides.
How do the amber cells work? They are the fold: the last column of the left board and the first column of the right board are the same cells. Tap one and the app shows its twin on the other board.
I'm stuck. How do hints work? Tap Hint. It first shows where to look, then explains why in one sentence, and only then places the digit. If a digit you placed is wrong, the hint says so and offers Check instead.
What is a streak shield? Reach a seven-day streak milestone to earn a shield (you can hold 2). If you miss a day, a shield covers it the next time you open the app, and your streak continues.
Can I play without a timer? Yes. Turn on Relaxed mode in Settings (the gear on Today) to hide the timer and mistake count during play.
My reminder doesn't arrive. Check that Crossfold's notifications are allowed in the iOS Settings app, and that the daily reminder is on in Crossfold's Settings.
Does Crossfold need the internet, or sync between devices? No internet is needed. Progress stays on each device; it isn't synced between devices.
How do I start over? Settings → Reset all progress. This can't be undone.
Email [email protected] and include your device model and iOS version.