Horizon Keyboard

A minimal Android keyboard built with Jetpack Compose, featuring dual-engine voice typing with support for English and 15+ Indian languages.

Features

Keyboard

- QWERTY layout with number row (1-0) - Shift toggle for uppercase letters - Symbol/Number mode (123 → symbol grid) - Contextual enter key — icon changes based on app (search/send/done/go) - Professional Material Design icons — vector drawables throughout - Dark theme (iOS-style dark keyboard aesthetic)

Voice Typing

- Dual-engine architecture — automatic model selection per language - Whisper (via Groq) — English specialist, ~4.4% WER, 2,000 free requests/day - Gemma 4 — Bangla specialist, powered by Google's Universal Speech Model - Android Built-in — offline fallback using Google Speech Services - Auto mode — routes English → Whisper, Bangla → Gemma automatically - Continuous listening with auto-restart on timeout - Voice commands: "command down", "slash agent", "enter", "backspace", etc.

Clipboard Manager

- Tracks clipboard history (up to 30 clips) - Save clips with long press - Paste/delete with icon buttons - Saved clips section with star indicators

Settings Panel

- Voice engine selector (Auto / Whisper / Gemma / Android) - Language picker — English or Bangla - API key management — Groq (Whisper) and Google AI Studio (Gemma) - Model selection — Gemma 4 E4B (better) or E2B (faster)