An app for drawing grids for select types of puzzles.
About this app
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;
Licensed under MIT, by Iain Findlay.
What's New in v2.1.3
Imported from the F-Droid repository index.
- * Fixed a bug where if you had auto-fill turned on on your keyboard, you couldn't type answers into the crossword.
- * Fixed a "bug" where ghost-mode stayed on when you switched between edit mode and fill mode.
- * Made the crossword grid (hopefully) scroll so that cell you select is visible.
Version history
Jun 18, 2021 · 18 MB · Android API 16–29 · code 15
Imported from the F-Droid repository index.
- * Fixed a bug where if you had auto-fill turned on on your keyboard, you couldn't type answers into the crossword.
- * Fixed a "bug" where ghost-mode stayed on when you switched between edit mode and fill mode.
- * Made the crossword grid (hopefully) scroll so that cell you select is visible.
SHA-256 35971ab7903d8b16864c7e54524b925bbbcfefca08302cdd0493d6beef9c33d4
Mar 3, 2021 · 18 MB · Android API 16–29 · code 14
Imported from the F-Droid repository index.
- * Allowing text file clues to be loaded (instead of only images). The formatting is still rather strict, but without knowing use-cases I can't really make it any better (I'm open to suggestions). This was only really added as an easy consequence to crossword generation anyway.
- * Fixing a "small" bug that caused an error screen to appear when you saved over a previous save. It still saved, and changing tab clears the error screen, so it wasn't bad from a functionality pint of view. It was just ba
SHA-256 fe6ad8139a7f10e116847d17532266a229c2fbdd44a592d6ecff81164f1ccc9a
Feb 21, 2021 · 18 MB · Android API 16–29 · code 13
Imported from the F-Droid repository index.
- * Changing the Save/Load text to a floppy-disc icon (and making it slightly smaller than the other options).
- * Generalising the main widgets to all use the same super-class (to make it easier to add things later).
- * Fixing a typo that meant that the sudoku puzzles were saving to the crossword save file. (This wouldn't have been noticeable on the user side, but I wanted to fix it anyway. If you had saved any sudoku puzzles since I added the option 2 days ago: Sorry, but you're going to lose your
SHA-256 6a5c145ad052d80a96a9e0ae69098796bdd03838c50746ed564685dea8a3f0be
Will it run on your device?
87%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be nds.fyll.puzzle_grid is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 2.1.2 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Puzzle Grid first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Puzzle Grid, and a listing is removed when the evidence for it stops holding up.
Get Puzzle Grid
Every source we list for nds.fyll.puzzle_grid is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
35971ab7903d8b16864c7e54524b925bbbcfefca08302cdd0493d6beef9c33d4
Signing certificate
265f4748093a6f0e2f299f4afb2dd8047a787795806dffd4812337a6df778c57
Permissions Required
What each permission lets Puzzle Grid do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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