“Write on the page with your pen. After a pause, the diary drinks your ink—your words fade into the paper—the page thinks for a moment, and an answer writes itself back in a flowing hand...”
Welcome to Riddle, a native Android diary application designed for tablets with stylus support (like the S-Pen) that recreates the magical Horcrux journal of Tom Riddle.
- Zero-UI Page: No screen overlays, no typing keyboards, no digital chat bubbles. A pure fullscreen paper sheet (
#ECEBE6) dedicated entirely to your handwriting. - Ink-Drinking Animation: 0.9 seconds after lifting your stylus, the ink blurs and dissolves directly into the page.
- Dynamic Souls (Personas): Tap the subtle indicator in the top-right corner to bind the diary's soul to a different character:
- ✦ Tom Riddle (Gold LED) — charming, manipulative, and deeply curious.
- ✦ Harry Potter (Scarlet LED) — warm, friendly, and slightly impulsive.
- ✦ Hermione Granger (Blue LED) — highly logical, warm-hearted, and encyclopedic.
- ✦ Ron Weasley (Orange LED) — informal, Quidditch-obsessed, complaining about homework.
- ✦ Normal Diary (Green LED) — a quiet, reflective, and poetic notebook assistant.
- Secret Key Configuration: Tap the screen with five fingers simultaneously to conjure the hidden setup panel where you can bind your Gemini API Key.
- Sub-2s Response times: Uses a smart Bounding-Box crop that shrinks exported OCR images by 90% (~5KB payloads) and executes API queries in parallel with the fade animations.
- UI & Layout: Jetpack Compose (
Canvasrendering and coordinate-pressure captures). - Core Engine: Direct chunk-streaming requests via Java's
HttpURLConnectionparsed dynamically using regex tokens (no heavy external HTTP clients). - Memory Storage: Local
SharedPreferencesto save your active character and API keys securely on-device.
- Download the compiled riddle-diary.apk file.
- Tap the APK on your Android device (enable "Install from unknown sources" if prompted).
- Get a free Gemini API key from Google AI Studio.
- Launch the app, enter your API key, tap Save Key, and start writing to the diary!
“I can show you. Let me take you back...”
🪄 Made with magic by adityazzzz