Zig Template Brings Memory-Safe Language to Flipper Zero App Development

A new open-source template lets developers build Flipper Zero applications in Zig instead of C, wiring the language’s build system into the existing ufbt toolchain for the device’s STM32WB55 ARM Cortex-M4 target. The two-stage pipeline compiles Zig sources to ARM object files using thumb/eabihf with ReleaseSmall optimization, then hands off to ufbt for linking against the Flipper SDK and packaging into deployable .fap files.

The template handles the awkward parts of bridging the two ecosystems: pre-configured include paths for FURI, the HAL, and protocol stacks like Sub-GHz, NFC, and RFID; correct ARM AAPCS and AAPCS-VFP calling conventions for entry points and callbacks; and workarounds for SDK headers Zig’s C translator chokes on, such as the opaque unions in input.h. A guided setup script populates app metadata, and zig build launch flashes and runs the app over USB.

For hobbyists and researchers building custom Flipper payloads, the appeal is compile-time safety and Zig’s cleaner cross-compilation story without giving up access to the full C SDK via @cImport. It’s currently tuned for ARM64 macOS toolchain paths and unaffiliated with Flipper Devices, with Windows support and automated SDK version detection on the roadmap.