For StringFusor on iPhone and iPad
StringFusor is a casual color-matching puzzle game by Halfmarble LLC (“halfmarble”). Drop strings of colored pieces onto your grid and build patterns that fuse and release their energy.
Need help? Email support@halfmarble.com. Include your device model, iOS version, and a short description of what happened.
Strings of colored pieces fall onto your grid. Steer each string with the MOVE buttons, FLIP it end for end, and DROP it where it helps. Same-colored pieces that form a pattern fuse and release their energy. There are no timers — the board waits as long as you need, and UNDO is unlimited. The in-game ORIENTATION teaches the six easiest patterns by building them, and the manual behind it explains the rest.
You pick one from the three cards on the landing screen. Each keeps its own best score and its own rankings.
By default it doesn’t. FOCUSED play is on when you install the game: on the Progression track, only the pattern you are being shown will clear, so a shape you happen to make by accident can never take the pieces you were building with. You can switch it off in SETTINGS, or with the focus icon on the game screen — it glows amber while it is on. With it off, every pattern clears, including ones you did not aim for. If a clear surprised you, that is the first thing to check.
HINT sits beside UNDO. Tap it and it stays on, highlighting the buttons to press until the pattern you are chasing is finished — the same way the ORIENTATION walks you through its lessons. Tap it again to switch it off. There is no limit and nothing expires.
Runs that took help are kept off the leaderboards. That means one of two things happened: you switched HINT on, or you played with FOCUSED off. With FOCUSED off more patterns clear, so those runs are not measuring the same thing the boards compare.
It applies to the rest of that run once it happens — turning HINT off again, or FOCUSED back on, does not lift it. The next run starts clean, unless you leave FOCUSED off, in which case that one is unranked from its first string too. Your best score is still saved on your device either way: the record is yours, the board is everyone’s.
That is STARRY NIGHT, and it is deliberate. After 15 seconds untouched the board and all the controls fade away and leave you the bare sky. Any touch brings everything back exactly as you left it — nothing is lost, and the game is not paused into anything you have to undo. You can switch it off in SETTINGS. It only starts happening after your first fusion, and DEMO takes priority over it.
REPLAY shows how you got here. It is not just the last clear — it re-plays every committed move from the first one, so you can watch a run build toward the pattern and scrub back to the beginning. The history follows what is actually on your board: UNDO removes a move from the replay too, and starting a new colony or changing track clears it.
DEMO lets the game play itself, so you can watch how patterns get built without touching anything. It is off unless you turn it on, in SETTINGS or from the landing screen. Nothing the demo plays is recorded — it never touches your scores or the leaderboards.
They are the two difficulty dials: how many colors the reactor deals, and how long the strings are. On PROGRESSION they move by themselves as you play — two colors, then three, then four — and every player meets the third color on the same string. On EXPERIMENT you set them yourself when you pick a target, and your score follows the difficulty you chose.
There is no timer anywhere in the game, and no penalty for thinking. UNDO is unlimited and goes all the way back to the first move. The commit buttons also ignore a second tap that arrives within a fraction of a second of the first, so a shaky or bounced tap does not fire twice. Sound, music and haptics can each be turned off in SETTINGS, and the element colors start muted — you can switch to the full-color set there too.
StringFusor is free to play, and the free half is a whole game, not a trial. There is no timer on it and nothing expires.
Free: the PROGRESSION track — the complete daily game, the same board for everyone, every day — plus the whole CHALLENGE ladder, the ORIENTATION and its exam, REPLAY, and the daily and exam rankings. You also get one EXPERIMENT hunt a day: the opening pattern, free, once every day.
The one-time Fusion Core unlock opens the EXPERIMENT track properly — the COLORS and LENGTH dials, browsing and skipping to any pattern you like, the Pattern Forge, and the EXPERIMENT leaderboard.
StringFusor has one optional purchase: a one-time unlock (Fusion Core) that opens the Experiment track and the Pattern Forge. It is tied to your Apple Account, so it carries across your devices and reinstalls. If it doesn’t show up:
Payments and refunds are handled by Apple, not by us. To request a refund, visit reportaproblem.apple.com.
Your settings, replays, and best scores are stored on your device only. There are no accounts and no cloud sync — if you delete the app, your progress is deleted with it.
RESET PROGRESS in SETTINGS erases every best score and record on the device. It asks twice, and it cannot be undone. Your Fusion Core purchase is not affected — that belongs to your Apple Account, not to the save file.
Leaderboards use Apple’s Game Center and are optional. If your scores aren’t submitting, check that Game Center is turned on in your device Settings. To keep your scores private, turn Game Center off there.
An iPhone or iPad running iOS 18 or later.
StringFusor collects no data about you — no accounts, no analytics, no ads, no tracking. Read the full privacy policy.