Help, answers and contact for Blue Grid Puzzle
Blue Grid Puzzle is a lights-out puzzle game for iPhone and iPad. Tapping a tile flips it and its four orthogonal neighbours; each board asks you to bring the whole lattice to one shade inside a fixed budget of taps.
There is no sign-up and no account. Install the app and play. A three-screen introduction explains the core rule, the special tile types and the daily puzzle; you can skip it at any point and revisit the same material later under Collection → Tile Codex and Settings → How to play.
Each board gives you a fixed number of taps. Par is the shortest route the built-in solver can find for that layout.
Marks unlock later chapters and the five lattice palettes. If you run out of taps the board ends and you can restart it immediately; nothing is lost and there is no penalty.
| Tile | What it does |
|---|---|
| Standard | Flips itself and the tiles directly above, below, left and right. |
| Anchor | Welded shut. It never flips, cannot be tapped, and is ignored when the board is checked. Treat it as a wall to route around. |
| Beam | Sweeps its entire row instead of a cross. Powerful, and easy to overshoot with. |
| Drift | Once lit, it dims itself again one turn later. The board is checked before drift resolves, so lighting a drift tile with the move that finishes the board still wins. |
Yes, and this is enforced rather than assumed. Boards are built backwards from a solved position, then checked by a solver and replayed under live drift behaviour before you ever see them. Any board that turns out to be a slog is discarded and regenerated. Par is the verified optimum, so the three-mark target is always genuinely reachable.
Tap Hint. It spends one beacon and outlines the next tap on a shortest route from your current position. Only the first hint on a board costs anything — after that you can keep asking for free. Beacons are earned by clearing boards.
No. All seventy-two campaign boards are generated on your device. Only the Daylight Dispatch — the once-a-day puzzle built from a real city's sunrise and sunset — uses the network, and it falls back to cached readings when there is no signal. If your device has no radio at all, the app skips the network entirely and goes straight in.
Because it is derived from real numbers. Long days become light-up boards, short days become shut-down boards, and a cloudy reading welds more anchor tiles into the grid. A city near the poles in midwinter produces a very different puzzle from one on the equator.
A streak advances when you solve the Daylight Dispatch on consecutive days. Missing a full day resets the current streak; your best streak is kept. Optional reminders can be enabled in the Dispatch tab.
Each has its own switch in Settings. There is also a Calm animation option that removes the ripple and scale pulses when tiles flip, independent of the system-wide Reduce Motion setting (which the app also honours).
An optional backdrop you can set from Collection → Board backdrop using the camera or your photo library. It is downscaled, compressed and stored only in the app's private container. It is never uploaded or shared, and you can remove it at any time. You can also hide it without deleting it via Settings → Show board backdrop.
Settings → Reset progress clears every board result, mark, streak, cached reading and the backdrop from the device. This cannot be undone. Deleting the app removes the same data.
No. The daily puzzle uses a fixed list of forty world cities that ships inside the app. The app has no location permission and never asks for one.
Every tile is a VoiceOver button that announces its row, column, type and lit state. The app follows Dynamic Type throughout, respects Reduce Motion, and supports both portrait and landscape on iPhone and iPad. If something is difficult to use, please write to us — we will fix it.
Email [email protected]. Please include your device model and iOS version. We reply to every message, usually within two business days.