Technology
Engines built for Apple silicon
Every Built by Fenn title runs on our own engines with zero third-party code.

Realtime Strategy at the speed of silicon
Native
- Apple SiliconCompute
- Metal 4Renderer
- SwiftUIInteractivity
Our games are powered by our SweetBit proprietary game engine, which achieves unparalleled native performance across Apple devices.
SweetBit is our bare-metal Apple-native game engine, written from scratch using kernel-level intrinsics and bespoke data codecs.
With zero bloat from third-party engine ports and a first-principles approach to data design, the engine achieves blistering speeds for weightless compute. Designed from the first line of code for iPhone, iPhone Duo and iPad, its touch interface systems are completely native and fluid, and its Metal 4 render pipeline designed for quality visuals without the overhead.

A universe of sound in a grain of sand
- Spatial5th-order ambisonics, head-tracked
- EvolvingNo tired loops
- Offline100% on-device
Our spatial audio engine, Flyrebird, sets a new standard for mobile audio, featuring layered 5th order ambisonic ‘3D’ audio synthesis across foley, music and voice.
Inspired by our local lyrebirds, who boast unparalleled abilities in recreating the sounds they hear around them, the Flyrebird audio engine combines DAW-level audio layering with first-of-kind synthesis techniques and our Studio’s own library of pristine field and musical recordings.