NextCompanion

A minimal GTK4/libadwaita Nextbike client for Linux.

Features

• Interactive map with bike station markers (Leaflet.js)
• Marker clustering for dense areas
• Rent and reserve bikes directly from the map
• Filter by bike type (All / Standard / E-bikes)
• View active rentals and reservations
• Return bikes with station number or electric lock

Screenshots

Coming soon

Installation

Flatpak

# Build and install locally
flatpak-builder --user --install --force-clean build-dir org.nextbike.NextCompanion.yml

NixOS / Nix

Run directly:

nix run github:onny/nextcompanion

Or add to your flake inputs:

{
  inputs.nextcompanion.url = "github:onny/nextcompanion";
}

Then add to your packages:

environment.systemPackages = [ inputs.nextcompanion.packages.${system}.default ];

For development:

nix develop
cargo run

Usage

1. Sign in with your Nextbike phone number and PIN
2. Browse the map to find bike stations
3. Click a station marker to see available bikes
4. Rent or reserve a bike with one tap
5. View your active rentals via the "Rentals" button
6. Return bikes by entering the station number

Note: Sign-up is not supported. Create an account via the Nextbike website or official app first.

Privacy

This app does not track you or send telemetry. It only communicates with Nextbike API servers to perform bike operations.

Requirements

• GTK4 4.x
• libadwaita 1.x
• WebKitGTK 6.0

Building from source

# With Nix
nix build

# With Cargo (requires GTK4, libadwaita, WebKitGTK development packages)
cargo build --release

Tested cities

NextCompanion uses the Nextbike API and should work in any supported city. Tested with:

• KVV.nextbike (Karlsruhe, Germany)

Disclaimer

This is an unofficial client and is not affiliated with Nextbike GmbH.

License

See LICENSE file.