Onyx: Fitness & AI Coach

Onyx 2.8 is here: recovery that eases your week on its own, your runs beautifully mapped, new widgets in every size, and a smarter Apple Watch app.

Onyx is your AI fitness and nutrition coach, built to connect every part of your health instead of siloing it. Training, food, recovery, sleep, and bloodwork all talk to one coach that actually knows you, and acts on what it sees.

CONNECTED INTELLIGENCE

Most apps show you numbers. Onyx reads them together and does something about them.

Recovery Mode eases your entire week when you're run down, then lifts it on its own once you recover. Your flagged labs adjust your nutrition and training. Onyx projects where your body and lifts are headed. And it learns which days you feel your best. Every suggestion is a one-tap card with a clear reason, and nothing changes without your say-so.

A COACH THAT KNOWS YOU

Talk to your coach like a person. It remembers your goals, your history, and what you told it last week. Ask why a workout changed, what to eat to hit your protein, or how your week is trending, and get a straight answer grounded in your own data.

TRAINING THAT ADAPTS

Follow a plan that reads your mornings and adjusts to your recovery. Progressive overload is handled for you. Build your own exercises, swap movements from a full library, or let Coach build the whole session. Your workouts sync to Apple Watch with live heart rate, and now you can start one straight from your wrist.

NUTRITION WITHOUT THE BUSYWORK

Log food by voice, by barcode, or by describing it. Onyx sets smart calorie and macro targets that shift with your training days, helps you hit protein at every meal, and keeps the math out of your way.

RECOVERY, SLEEP, AND EARLY WARNINGS

Get a daily recovery score, a sleep read, and a heads-up before you feel run down. Onyx watches your baselines and tells you when something is off, so you can back off before it becomes a setback.

YOUR BLOODWORK, READ

Import your labs and see per-biomarker trends over time, a plain-English read on what is off, and one-tap actions that connect your results to your training and nutrition. A heads-up to discuss with your doctor, never a diagnosis. Pro.

YOUR RUNS, MAPPED

Cardio and workout summaries feature an immersive route map, your headline stats up front, splits, and heart-rate zones painted onto the trail. Tap for full screen and share your route.

ON EVERY SURFACE

Home Screen and Lock Screen widgets in every size put calories, recovery, rings, and streak where you already look. Apple Watch complications bring Onyx to your watch face, and everything syncs across your devices automatically.

Start free. Onyx Pro unlocks labs, projections, and the deepest coaching.

Onyx is a wellness and fitness tool. It does not provide medical advice, diagnosis, or treatment. Always consult a qualified professional about your health.