Foldtone: Fold & Tilt to Play

A little face that sings when you move your phone.
Foldtone is a playful pocket instrument for foldable and regular Android phones.

PLAY WITH MOVEMENT
Foldable phones use a compatible hinge sensor first. Other phones use gravity or accelerometer-based tilt. The mouth and pitch respond to your movement. In tilt mode, hold a comfortable pose and long-press the face to recenter.

MAKE IT YOURS
Choose a coordinated palette or customize the body, eyes/mouth and tongue with HEX colors. The character blinks naturally. Basic playing and color customization are free.

SIMPLE CONTROLS
Tap the face to mute or resume. Use the small OCT control to change octave. Your appearance and sound settings are saved on the device.

OPTIONAL FOLDTONE PRO
A single non-consumable in-app purchase unlocks extra sounds, 12 musical keys, major/minor/pentatonic/chromatic scales, and a fret/pitch-snap switch. Turn frets off for smooth continuous slides between notes. This is not a subscription. Google Play shows the actual purchase price, and purchases can be restored with the purchasing Play account.

NO ADS OR APP ACCOUNT
Core playing and colors work on-device. Pro purchase verification/restoration needs an internet connection and is checked by our server. No microphone recording, advertising or analytics SDK is used.

Notes
- Android 11 or later. The current settings interface is in Korean; musical keys and the main OCT/PRO controls use standard labels.
- Sensor behavior varies by device. Coarse hinge devices estimate intermediate movement with a gyroscope and can be affected by whole-device rotation.
- If no suitable sensor is available, drag on the face to play.
- Speaker playback may raise media volume. Use the device volume keys and handle the hinge gently.

Support: tntlabgo@gmail.com
Privacy: https://foldtone.vercel.app/privacy.html