HeliboardL

HeliboardL (Standard Version) is a fork of HeliBoard – a privacy-conscious and customizable open-source keyboard based on AOSP/OpenBoard.

This fork adds AI-powered features using the Gemini API while maintaining the original project's offline-first philosophy.

What's New in HeliboardL

- 🤖 Gemini AI Proofreading – Fix grammar and spelling with one tap (Standard only) - 🌐 AI Translation – Translate selected text directly (Standard only) - 🎨 Modern UI – "Squircle" key backgrounds and refined icons (incognito, etc.) - 🕵️ Clear Incognito Mode – Distinct "Hat & Glasses" icon for better visibility - 🔒 Privacy Choices – Choose between Standard (offline-first with opt-in AI) or Offline (network features hard-disabled) versions - 📥 Gesture Library Downloader – Easier setup for glide typing

📦 Choose Your Version

We provide two distinct versions. Note: Both versions share the same package name (helium314.keyboardl) and signature, so only one can be installed at a time.

1. Standard Version

- Features: Full suite including AI Proofreading, AI Translation, and the Gesture Library Downloader. - Permissions: Requests INTERNET permission (used only when you explicitly activate AI features or download libraries). - Best For: Users who want smart features alongside strong privacy controls.

2. Offline Version

- Features: All UI/UX refinements (Squircle keys, new icons) but excludes all AI and network-related features. - Permissions: NO INTERNET PERMISSION in the manifest. This is guaranteed at the OS level. - Best For: Privacy purists who require a hard guarantee that no data can ever leave the device.

Original HeliBoard Features

- Add dictionaries for suggestions and spell check - Customize keyboard themes (style, colors, and background image) - Customize keyboard layouts - Multilingual typing - Glide typing (requires a closed-source library) - Clipboard history - One-handed mode - Split keyboard - Number pad - Backup and restore settings

For original feature documentation, visit the HeliBoard Wiki: https://github.com/Helium314/HeliBoard/wiki

Setup

Gemini API Key (for AI features)

1. Get your free API key from Google AI Studio. 2. Go to HeliboardL Settings → Advanced → Gemini API Key. 3. Enter your API key. 4. Change the Gemini model to gemini-2.5-flash or gemini-3n-e2b-it for best performance.

AI Translation Setup

1. Go to Settings → Toolbar → Customize Toolbar and add the "Translate" key. 2. Go to Settings → Advanced → Translation Target Language and select your desired output language.

Gesture/Glide Typing

- Standard Version: Use the built-in downloader in Settings → Advanced → Load Gesture Typing Library.

- Offline Version: Since network access is disabled, you must install the library manually:

1. Download the library file: libjni_latinimegoogle.so (for arm64). 2. Go to Settings → Advanced → Load Gesture Typing Library. 3. Select "Load from file" and pick the downloaded .so file.

⚠️ Important

Privacy Notice: While HeliboardL itself is open-source and respects your privacy, using the free tier of the Google Gemini API means your input data may be used by Google to improve their models.

- Using AI features is optional. - Do not process sensitive information (passwords, credit card numbers, private addresses) using the AI Proofreading or Translation features. - The Offline Version completely removes this code and the associated permission.