TwinlatchTwo rows.
One clue.
No guesses.
Some rows are latched in pairs, and one raspberry twin number counts a shape that touches both. Read the pair together, latch the cells, and reveal the picture without guessing.
Free to start on Android · No ads, ever.
Twin clues across two rows
Every board proved by logic
No ads, no lives
How it plays
A picture logic puzzle with a rule of its own: twin clues that span two rows.
Twinlatch is a picture logic puzzle built on twin clues. Most rows read the usual way: each number is a run of filled cells. But some boards latch two neighbouring rows together, and a raspberry twin number drawn across both counts one shape that touches both rows, joined edge to edge; every other number belongs to its own row. The two rows have to be reasoned about together, and the tutorial teaches it on the very first board. 101 of the 107 ladder pictures use twin clues, and every board is proved by the app's solver to have exactly one solution, reachable by logic alone. There are no lives and no fail state: a wrong mark never ends a puzzle. Climb the ladder across 5×5, 10×10 and 15×15 boards, deal fresh practice boards, or solve the same ranked Daily as everyone else.
- Twin clues: one number spans two latched rows
- 107 pictures on 5×5, 10×10 and 15×15 boards, 101 with twin clues
- Every board proved to have one solution, reachable by logic alone
- One shared ranked Daily, replayed on the server before it counts
The loop
Every run follows one honest loop.
- 01Find the latched pair
- 02Read its twin number across both rows
- 03Latch the forced cells
- 04Cross the known spaces
- 05Reveal the picture
- 06Return for tomorrow's shared Daily.
What is inside
Inside Twinlatch.
One clue spans two rows
A latched pair of rows shares its clues. A raspberry twin number drawn across both counts a single shape that touches both rows, cells joined edge to edge, never diagonally. The pair's other numbers each belong to the one row they sit in.
Every board is proved
Every ladder board, every practice board and every Daily is checked by the app's solver for exactly one solution and a path to it with no guessing, twin clues included.
Paint a whole thought
Fill or cross several cells in one stroke, then undo or redo that stroke as a single decision. A loupe magnifies the cell under your finger on large boards, and a solved board develops from ink into a coloured picture for your gallery.
Ask for logic, not an answer
The optional hint reveals one cell that follows logically from the board as it stands, and it is fully undoable. It is off on today's Daily for everyone, so paid access never changes the competition.
One honest board every day
Everyone receives the same puzzle each UTC day, ranked by time. The server replays each ranked move log before accepting the result, with no account needed. From 31 October the ranked Daily uses twin clues too.
Why it exists
Built for a reason.
A latched pair changes how you read a board: a twin number tells you about two rows at once, and neither row can be solved alone. Twinlatch builds every picture around that rule and proves each one solvable by logic, with no lives and no guessing.
Made for puzzle players who want a calm daily logic ritual with a rule they have not met before, tactile controls, measured difficulty, and no ads, lives, energy or paid leaderboard advantage.
Inside the app
Real screens from Twinlatch.
Fair unlocks
Play free. Own the rest when it earns it.
Free
$0
- The tutorial and today's ranked Daily
- The first 26 ladder puzzles (the whole Gentle tier)
- Three practice boards a day
- Unlimited hints outside the Daily; no ads or lives
Twinlatch Full Game Unlock
$4.99 one-time
- All 107 ladder puzzles
- Unlimited practice and the full Daily archive
- Mistake highlighting outside ranked play
- Advanced statistics and a weekly Streak Saver
StackForge Play Pass
$2.99/mo or $14.99/yr
- Pro in every participating StackForge game
- Best for players who want the full game portfolio
Includes every StackForge game and One Good Thing; PlateStack is separate
The ranked Daily is identical for free and Pro. No ads, no energy, no paid leaderboard advantage.
Our promise, in every StackForge game
No ads. Ever.
- No banners
- No videos between levels
- No watching ads for rewards
- No advertising code in any app
Our games pay for themselves with optional unlocks, never with your attention.
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Not to advertisers, not to data brokers, not to anyone.
We don’t track you.
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No account needed.
Every game plays without signing up. An account is optional: it carries the Play Pass between games, and cloud saves in the games that have them.
Pay once, own it.
$4.99 unlocks a game for good. A subscription is only ever an option.
Ready when you are
Play Twinlatch.
Free to start on Android, with no ads, ever.
