Synchorus is an app that connects multiple smartphones via Wi-Fi to play music simultaneously, just like one large speaker.

When you play music on a single device (the host), the exact same music flows out through all devices connected in the same room in precise synchronization. Whether for camping, home parties, practice sessions, or outdoor gatherings—gather nearby phones to amplify the sound when a single speaker isn't enough.

Synchorus is an app that connects multiple smartphones to create a single, powerful sound. ■ Key Features

- Precise Synchronized Playback: Playback synchronized down to the millisecond across multiple devices

- Easy Connection: Join immediately via room code; no server, sign-up, or login required

- Host/Speaker Mode: One person controls, others use the speakers

- A-B loop and section save slots

- Pitch (semitone) adjustment, playback speed adjustment

- Background playback + lock screen/notification controls

■ For Those Who

- Want to increase the volume during camping, picnics, or home parties

- Listen to the same music on multiple devices during ensemble practice or rehearsals

- Practice songs alone (transcription/practice using slow playback, transposition, and loops)

- Need louder sound using only your phone without speakers

You can use it like a standard music player with just a single device, and features like loop, playback speed, and pitch adjustment are particularly useful for instrument practice.

It operates via a direct device-to-device (P2P) connection without going through a server, and does not collect or store personal information.

The free version allows you to sync up to two devices with ads, and a one-time 'Pro' payment removes ads and enables unlimited device connections.