Sensory Running · Coming Soon

Run
in tune

SONIX is a music player built for running. The beat guides your pace. Your legs follow without thinking about it. No watch. No voice. No effort.

You're on the list ✦

No spam. First to know when SONIX launches.

How it works

The beat is
your pacer

SONIX reads your run in real time — pace, terrain, heart rate — and shapes the music around your performance. Subtly. Intelligently. You never consciously notice it happening.

01
Set your goal
Tell SONIX your target pace for 5km. That's the ghost. Everything the engine does is in service of getting you there.
02
We listen first
The first 400m SONIX measures your natural cadence and stride silently. No tapping. No setup. Just run. The engine calibrates to your body automatically.
03
The engine decides
Every 30 seconds the SONIX engine makes a strategic decision. Not reactive — deliberate. It looks at your whole run and chooses the right moment to push, hold, or ease.
Cruise Hold Nudge Push
04
Music does the rest
The beat shifts. Your legs follow automatically — it's neurological, not conscious. The music speeds up just enough that your cadence responds without you deciding to run faster.
The research

Your brain
already knows

Runners unconsciously synchronise their stride to the beat of music. This is not a choice — it is a neurological response. Studies in sports science have consistently shown that auditory rhythm entrainment reduces perceived effort and improves running economy. SONIX uses this response as a coaching mechanism. The beat is the pacer. Your legs follow without thinking.

🔬
Auditory-motor coupling in running — research shows that synchronising movement to a musical beat reduces oxygen consumption by up to 7% and significantly lowers perceived exertion compared to running without rhythmic audio cues.
🧠
The brain doesn't distinguish — when the beat changes, the motor cortex responds before the conscious mind registers the change. SONIX exploits this lag window. By the time you notice the music shifted, your cadence already has.
Stride sync visualisation
Your stride
syncing
The beat
Result
Stride and beat lock together. Perceived effort drops. Economy improves. The runner doesn't decide to run better — the music makes it happen.
The engine

A coach that
never stops

Every 30 seconds the SONIX engine analyses your run and makes one strategic decision. Not reactive — it looks ahead at terrain, reads your effort, and manages your energy across the whole distance. The music responds. You don't have to think.

CRUISE
BPM × 1.00 — locked to your cadence
On pace, terrain flat, effort sustainable. Music plays at your calibrated BPM. The engine trusts you.
"You're in the zone"
HOLD
BPM × 0.96 — gentle settle
Hill incoming, heart rate elevated, or too far ahead of pace. Engine banks energy. Protects your finish.
"Save it for later"
NUDGE
BPM × 1.05 — subtle lift
Behind pace, terrain clear, effort has room. Music rises 5%. Your legs chase the beat without deciding to.
"Let's chase it down"
PUSH
BPM × 1.10 — release everything
Final 800m. The engine releases what it's been saving. Music builds. You feel it. You cross the line faster than you started.
"This is your moment"
Why SONIX

Not a playlist.
A coach

SONIX
Everything else
Reads your pace and terrain in real time
✓Every 30 seconds
—No
Adjusts music BPM strategically
✓Proactive, not reactive
—No
Detects hills before you hit them
✓GPS terrain scanning
—No
Engineers a negative split
✓Built into the algorithm
—No
Learns your personal fatigue profile
✓Silently, every run
—No
Requires the runner to think
✓Never
—Always
Early access

Run before
everyone else

We're selecting 10 beta runners for the first real world test. If you're a 5km to 10km runner with an iPhone — we want you.

You're on the list ✦
We'll be in touch before launch

iPhone required · iOS 16+ · No spam ever