Puzzle Grid

Puzzle Grid is a writing application developed by Iain Findlay, packaged as a single Android APK of version 2.1 weighing in at 17.96 MB. The package targets Android 4.1+ and above. Below you'll find the publisher's own description, a quick spec sheet, and a short buyer-beware checklist so you know exactly what you're installing before tapping download.

1. Only download through the button on this page — never from third-party mirrors or shortened links, which are the most common way malware spreads.
2. File size is a light 17.96 MB, so it installs quickly even on modest connections.
3. This build is signed by "Iain Findlay" — always verify the developer name matches what's listed on the app's official store page before installing an update.
4. After install, Android may prompt you to allow "Install from unknown sources" — approve only this one install, then revoke the permission in Settings > Apps > Special access.
5. We link directly to the APK file or the publisher's repository; we do not modify the binary. Always run a virus scan after any sideloaded install.

An app for drawing and filling in selected puzzle grids on your phone/tablet, to avoiding having to write on public papers, or for if you only briefly have access to the puzzle.

Supports Crossword, Sudoku, and Battleship grids.

For Crossword grids:

* Draw a grid with any rectangular dimensions;

* Use common symmetries to quickly draw the grid;

* Load clues into the app as an image;

* Highlight clues in the image so that they can be visible alongside the grid;

For Sudoku grids:

* Undo actions;

* Ghost mode allows you to test solutions without overwriting the cells you are confident in;

* Automatically check for repeated numbers;

For Battleship grids:

* Draw a grid with any rectangular dimensions;

* Undo actions;

* Ghost mode allows you to test solutions without overwriting the cells you are confident in;

* The app keeps track of how many boats of each length you have and how many segments in each line;

For all grids:

* Save and load partially filled grids to return to later;

* The option to autosave allows the grid to be stored for when you next open the app;

Is Puzzle Grid free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does Puzzle Grid require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is Puzzle Grid safe to install?
We link to the exact APK published by Iain Findlay. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update Puzzle Grid?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

1. Tap the Download APK button above and save the file to your device.
2. Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
3. Open the downloaded nds.fyll.puzzle_grid.apk file from your Downloads folder.
4. Tap Install and wait for Android to finish.
5. Open «Puzzle Grid» by Iain Findlay and grant only the permissions it actually needs.
6. Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.