FastsApp is a small native WhatsApp client for Linux, macOS, and Windows. It is written in Rust with egui, has no browser engine, and connects as a linked device through whatsapp-rust.
0.10.0 brings contact management to the desktop. Start a chat from a phone number, message someone you met in a group, and save or rename contacts without picking up your phone. This release also makes the app and its documentation shorter and clearer.
New
- Start a chat from a phone number. Open New contact beside Settings and enter the number with its country code. FastsApp checks that the number is on WhatsApp, then opens the chat. Add a name to save the contact at the same time.
- Message people you meet in groups. Open a group member's card and choose Message, even if you have never chatted before.
- Add or rename contacts from their card. First name and surname sync through WhatsApp to your linked devices. A setting under Chats controls whether the contact is also added to the phone's address book; it is on by default.
Improved
- The app says things more plainly. Settings, dialogs, errors, buttons, and the documentation have had a full plain-language pass.
- Form hints line up with the text you type. Placeholders now use the field's font and size, including the phone-number fields.
Install
| Platform | Download |
|---|---|
| Arch Linux | fastsapp-bin or fastsapp on the AUR
|
| Linux | fastsapp-v0.10.0-x86_64-unknown-linux-gnu.tar.gz or the arm64 tarball
|
| macOS | fastsapp-v0.10.0-macos-universal.dmg for Apple Silicon and Intel
|
| Windows | fastsapp-v0.10.0-x86_64-pc-windows-msvc-setup.exe or the Windows on ARM installer
|
checksums.txt contains the SHA-256 checksum for every file. The macOS build is not notarized, so follow the first-open steps on the download page. Windows may show a SmartScreen warning because the installer is not code-signed.
FastsApp is unofficial and is not affiliated with WhatsApp or Meta. Using an unofficial client may be against WhatsApp's terms of service and could get an account suspended. Use it at your own risk.
Full changelog: v0.9.0...v0.10.0