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Sun Piano

Piano and synthesizer with 8 instruments, recording, metronome and MIDI input
New in version 1.0
1.0:
• Needs Android 12 or newer, and no longer asks for the location permission
• New About screen: version, license and links to the source code
• On phones the whole top bar fits: Settings and About are icons
• Metronome: Start/Stop is next to Done, always visible on phones
• A damaged settings file no longer crashes the app; it's replaced and saving works again
• No stuck note when a MIDI keyboard is unplugged while playing
Sun Piano is an electronic piano for Android. Every sound is synthesized in real time by its own engine, so the app is small and needs no sample downloads.

Keyboard

  • All 88 keys, multitouch, with a mini-map to jump anywhere on the keyboard

  • Glissando: slide a finger across the keys to play each one

  • Loudness from where you touch a key

  • Note names as letters or Do-Re-Mi, 7 to 28 visible keys, octave buttons

  • Tablets held upright (Android 16 and newer) show two keyboards stacked



Sound

  • 8 instruments: Piano, Electric Piano, Honky-Tonk, Organ, Strings, Harpsichord, Marimba, Synth Lead

  • 24-voice polyphony, sustain pedal, stereo reverb, low-latency audio

  • Transpose and tuning (A4 from 415 to 466 Hz)



Practice and recording

  • Metronome with tempo, time signature, tap tempo and beat indicator

  • Record and play back what you play. Each recording keeps every note's instrument, even when you switch instruments in the middle, and the settings it was made with, such as the tuning

  • A Library to play, rename and delete recordings



Share and import

  • Share a recording as audio (.m4a), which plays on any phone or computer and in messaging apps

  • Share it as a standard MIDI file, with General MIDI instruments, to edit the notes in other music programs

  • Import MIDI files from other apps: all tracks, tempo changes and the sustain pedal, with their instruments matched to Sun Piano's sounds (drums are left out)



Connect a keyboard

  • USB MIDI keyboards, and Bluetooth LE MIDI keyboards found and connected from Settings (notes and sustain pedal)

  • A computer keyboard: Z to M and Q to U play two octaves, Space is the sustain pedal



No ads, no tracking, no internet access. Free software under the GNU GPL v3 or later.

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 1.0 (2) suggested Added on Oct 18, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 12 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • connect to paired Bluetooth devices
      Allows the app to connect to paired Bluetooth devices
    • discover and pair nearby Bluetooth devices
      Allows the app to discover and pair nearby Bluetooth devices
    • code.alimiracle.sunpiano.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 2.4 MiB PGP Signature | Build Log

  • New in version 0.9
    First release (0.9):
    • 88-key multitouch keyboard with glissando, touch loudness and note names; two keyboards on upright tablets
    • 8 synthesized instruments, sustain pedal, reverb, transpose and tuning
    • Metronome with tap tempo
    • Recordings keep every note's instrument and their settings
    • Share as audio (.m4a) or MIDI; import MIDI files
    • USB and Bluetooth MIDI keyboards, and computer keyboards
  • Version 0.9 (1) - Added on Oct 14, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 8.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • access precise location only in the foreground
      This app can get your precise location from location services while the app is in use. Location services for your device must be turned on for the app to get location. This may increase battery usage.
    • pair with Bluetooth devices
      Allows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
    • access Bluetooth settings
      Allows the app to configure the local Bluetooth phone, and to discover and pair with remote devices.
    • connect to paired Bluetooth devices
      Allows the app to connect to paired Bluetooth devices
    • discover and pair nearby Bluetooth devices
      Allows the app to discover and pair nearby Bluetooth devices
    • code.alimiracle.sunpiano.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 1.7 MiB PGP Signature | Build Log