Customizable open-source keyboard
About this app
HeliBoard is a privacy-conscious open-source keyboard, based on AOSP / OpenBoard. Does not use internet permission, and thus is 100% offline.
Features:
• Add dictionaries for suggestions and spell check
• build your own, or get them here, or in the experimental section (quality may vary)
• additional dictionaries for emojis or scientific symbols can be used to provide suggestions (similar to "emoji search")
• note that for Korean layouts, suggestions only work using this dictionary, the tools in the dictionary repository are not able to create working dictionaries
• Customize keyboard themes (style, colors and background image)
• can follow the system's day/night setting on Android 10+ (and on some versions of Android 9)
• can follow dynamic colors for Android 12+
• Customize keyboard layouts (only available when disabling use system languages)
• Customize special layouts, like symbols, number, or functional key layout
• Multilingual typing
• Glide typing (only with closed source library ☹️)
• library not included in the app, as there is no compatible open source library available
• can be extracted from GApps packages ("swypelibs"), or downloaded here (click on the file and then "raw" or the tiny download button)
• Clipboard history
• One-handed mode
• Split keyboard (only available if the screen is large enough)
• Number pad
• Backup and restore your settings and learned word / history data
Licensed under GPL-3.0-only.
What's New in v4.0
Imported from the F-Droid repository index.
- * add background gesture data gathering
- * add file / image functionality to clipboard history
- * add floating keyboard
- * add Unicode 17.0 emojis
- * add separate scale settings for foldedable phones
- * add touchpad mode on space slide
Version history
Jul 12, 2026 · 21.2 MB · Android API 21–36 · code 4005
Imported from the F-Droid repository index.
- * add background gesture data gathering
- * add file / image functionality to clipboard history
- * add floating keyboard
- * add Unicode 17.0 emojis
- * add separate scale settings for foldedable phones
- * add touchpad mode on space slide
SHA-256 8565efad70adb296c50555eded868274e607bc910165b3a4255d6709af9a887d
Jul 1, 2026 · 21.2 MB · Android API 21–36 · code 4003
Imported from the F-Droid repository index.
- * add background gesture data gathering
- * add file / image functionality to clipboard history
- * add floating keyboard
- * add Unicode 17.0 emojis
- * add separate scale settings for foldedable phones
- * add touchpad mode on space slide
SHA-256 cd171d890998c7ac1f983af8fb10b51bdcce3615730880705015aff26086beef
Mar 31, 2026 · 21.5 MB · Android API 21–35 · code 3901
Imported from the F-Droid repository index.
- * allow switching app (settings) language in system settings
- * optionally swipe down on toolbar to hide keyboard
- * add HCESAR layout
- * inform about missing emoji dictionary when enabling emoji suggestions
- * fix issues with active gesture data gathering
- * minor fixes and improvements
SHA-256 4cccf4943ad4e5fce218ec47153c57a783c56b12a3c18d82ff0d36686efb837d
Will it run on your device?
92%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
- 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 helium314.keyboard 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, 4.0-beta1 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall HeliBoard 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 HeliBoard, and a listing is removed when the evidence for it stops holding up.
Get HeliBoard
Every source we list for helium314.keyboard 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
8565efad70adb296c50555eded868274e607bc910165b3a4255d6709af9a887d
Signing certificate
5ec0a5313aa43558ee75b20b58ccd8194cdbf066df94a43ba288d933d60b86ce
Permissions Required
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.
Report a problem with this listing
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