Download

ZapFast was previously called FastsApp. Version 0.13.0 introduces the new package and executable names. Your existing session and local data move automatically when you first start ZapFast; quit FastsApp before upgrading.

The current version is v0.20.0. SHA-256 checksums are in checksums.txt. Older versions are on the releases page.

Linux

On Arch Linux and derivatives, install from the AUR:

yay -S zapfast-bin    # prebuilt
yay -S zapfast        # builds from the release source
yay -S zapfast-git    # builds from the latest commit

With Nix, install from the flake:

nix profile install github:crmne/zapfast

NixOS configurations can add the repository as a flake input and include inputs.zapfast.packages.${pkgs.system}.default in environment.systemPackages.

For other distributions, download a tarball with the binary, desktop file, and icon:

Or take the AppImage: one file to make executable and run, with no installation. It uses the same libraries as the tarball and needs FUSE (or run it with --appimage-extract-and-run). It does not update itself; download the new file when ZapFast says a release is out.

ZapFast needs glibc 2.36 or newer (Debian 12, Ubuntu 22.10, Fedora 37 and newer), the standard egui libraries, ALSA and libpipewire 0.3.53 or newer: libglvnd, libxkbcommon, wayland, libx11, alsa-lib and libpipewire (on Debian or Ubuntu: libasound2t64, libpipewire-0.3-0t64, libgl1, libxkbcommon0, libwayland-client0). Sound goes to PipeWire itself, else to PulseAudio, else to ALSA. Emoji come from the desktop’s colour emoji font when one is installed (noto-fonts-emoji, fonts-noto-color-emoji on Debian), else from the copy ZapFast bundles. The file picker uses xdg-desktop-portal.

A Flatpak bundle is being prepared; ZapFast is not on Flathub yet.

macOS

One download for both Apple Silicon and Intel:

Open it and drag ZapFast to Applications.

If you use Homebrew, you can install it with:

brew install --cask crmne/tap/zapfast

The app is signed with Developer ID and notarized by Apple. The DMG includes a validated notarization ticket.

When upgrading from FastsApp, remove the old FastsApp application bundle after installing ZapFast.

Windows

The installer is a Windows Installer package (.msi). It adds ZapFast to the Start menu and needs no administrator rights. Choose x86_64 for most PCs or aarch64 for Windows on ARM:

If you installed ZapFast with the older setup program (-setup.exe), 0.20.0 and later move to the package through their own updates. On 0.19.0 or earlier, run the .msi once: it installs into the same folder and replaces the old installer’s entry in Settings > Apps. Your session, chats and settings stay.

To run ZapFast without installing it, download a zip, extract it, and run zapfast.exe.

ZapFast draws with OpenGL and needs a graphics driver with OpenGL 2.1 or newer. Install the driver from the maker of your graphics chip: the Microsoft Basic Display Adapter, some virtual machines, and some remote desktop sessions offer no usable OpenGL, and Windows then shows a message instead of starting.

SmartScreen may warn about an unknown publisher on first run. Choose More info, then Run anyway.