A calm tide-pool puzzle for iPhone. Draw one line, clean the pool, and watch Pebble swim.

December 2026 on iPhone

1. 1

   Draw one line through every square

   Start on shell 1 and drag up, down, left or right. Pass the numbered shells in order and fill every square of the pool. The rule fits in one look; finding the route is the fun.

   Changed your mind? Drag back along your line as far as you like. There's no penalty for a wrong move.

   

2. 2

   The stream cleans the pool

   Bottle caps, cans and scraps of net litter the sand. As your turquoise stream passes, each square turns to clear, sparkling water and the litter pops away in a bubble.

   

3. 3

   Pebble swims your route

   Solve the pool and Pebble the otter dives in and swims your exact path, bouncing every shell, then leaps out with a splash as fish return to the clean water. Tap to hurry Pebble along.

   

4. 4

   Currents from level 21

   Blue arrow squares are ocean currents: your line may only cross them the way the arrow points. Together with coral reef walls, they turn bigger pools into real brain teasers.

   

Calm, with a little challenge

• 1,000 levelsEach one checked by a solver to have exactly one solution.
• Play at your paceNormal levels have no timer and can't be lost.
• Beat the tideHard levels add a race against the rising tide. Out of time? Just try again.
• Plays offlineNo account, no sign-in. Your progress stays on your iPhone.
• 12 sea crittersPebble first; new friends join your album as you play.
• The Daily TideOne calm, untimed puzzle a day. Keep your streak going.
• Free, with adsShort ads between some levels; one purchase removes them.

Coming in December 2026

Tide Trail is planned for the App Store in December 2026. Want to try it before then? Email support@hineskeep.com and we'll send you a TestFlight invitation. Questions or ideas go to the same address, or see Tide Trail support. Read how the game handles your data in the privacy policy.