Responsive, never twitchy
The engine follows the rhythm you hold, so it feels driven by your hands without reacting noisily to every isolated key.
Engine sound for macOS
Your keyboard,
with an engine.
Type and it fires up. Hold a rhythm and it climbs through the gears. Push your pace and it runs for the redline.
Try it for 2,000 wordsOne payment · ₱199
Fifteen engines
From a thumping single to cross-plane V8s, a rotary, V10, V12, W16, and Ion Drive. Every sound is synthesised in real time.
No subscription
Try the full engine for 2,000 words. One lifetime purchase keeps it running. Restore it on another Mac with your Apple Account.
Your words stay yours.
Redline listens only for timing and coarse key categories. It cannot reconstruct what you type, never stores global key events, and never sends typed content anywhere. Input Monitoring is used only so the engine can respond while you work in other apps.