Create and explore polygon tessellations of the plane
About this app
Tessella is an editor for polygon tessellations of the plane: interactively create, view and manipulate tilings made of simple (regular and irregular) polygons.
Features:
* Add polygons from a palette, or by clicking any boundary edge, with automatic validation that keeps a proper edge-to-edge finite tessellation. * Editing tools: eraser (vertices, edges, polygons), interior insertion, and "Add Copy" to grow a tiling by welding on a copy of itself under a plane isometry (translate, rotate, reflect, glide reflect), snapping to exact anchors. * Selection and styling: select by click, colour or shape; recolour with a built-in colour picker. * Pan, zoom and rotate the canvas; export to SVG and DOT.
The app is a thin WebView wrapper around the same client-side editor that is published on the web and as a PWA. Everything runs on-device: no network access, no accounts, no trackers.
Licensed under Apache-2.0, by Mario Càllisto.
What's New in v0.6.3
Imported from the F-Droid repository index.
Version history
Jul 5, 2026 · 1.9 MB · Android API 29–35 · code 603
Imported from the F-Droid repository index.
SHA-256 ecc4d58bda4145d54b253498c3f6f47fb956f05183f76a029eafb9b674eb79dc
Jun 26, 2026 · 1.9 MB · Android API 29–35 · code 602
Imported from the F-Droid repository index.
- Bug fixes for the first F-Droid release.
- * Fixed the top toolbar (menu, language and mode switches) being buried under the status bar on Android 15+, which made the menu unreachable.
- * Fixed the bottom of the Shapes palette being covered by the toolbar.
- * Fixed the app icon not showing in the F-Droid client.
SHA-256 ec0c830d23bee4d43121301ab1c90e90735eaeca1d0178b6c7a57899c7d3679b
Jun 21, 2026 · 1.9 MB · Android API 29–35 · code 601
Imported from the F-Droid repository index.
- First F-Droid release.
- * Polygon tessellation editor wrapped as a native WebView app.
- * Create tilings from a palette or by clicking edges, with live validation.
- * Add Copy under a plane isometry (translate, rotate, reflect, glide reflect) with anchor snapping.
- * Eraser, interior insertion, selection by colour/shape, colour picker.
- * Pan, zoom, rotate; export to SVG and DOT.
SHA-256 05c8ba4ff00fe2d1e9f6d04532c8b2e183aea81c7c89639505d049f4740bac87
Will it run on your device?
60%
- Targets newer Android builds, so legacy devices may be excluded.
- ABI coverage is focused on newer 64-bit devices.
- Aligned with the latest Android target SDK expectations.
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 art.tessell.editor 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, 0.6.2 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Tessella 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 Tessella, and a listing is removed when the evidence for it stops holding up.
Get Tessella
Every source we list for art.tessell.editor 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
ecc4d58bda4145d54b253498c3f6f47fb956f05183f76a029eafb9b674eb79dc
Signing certificate
f744de6992303149c57f1183e124ace8895a1dcbbfe65a2e46fbe2da9f4c142d
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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