Onyx: Fitness & AI Coach

Recovery, Macros & AI Coach

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

3.5: every screen rebuilt on glass, biological age explained factor by factor, readiness that adapts through the day, and nine widgets. Free update. Onyx reads your Apple Watch, your bloodwork, your training and your food — and tells you what to do today. Most fitness apps show you a dashboard and leave you to work it out. Onyx opens with a sentence and a button. Train hard, or don't. Eat this next. Be in bed by 10:45. Every answer comes from your own data, and every answer says why. READINESS, READ EVERY MORNING Overnight HRV, resting heart rate, sleep and breathing become one score before you're out of bed. Then the day spends it: a heavy session, a long walk or a stressful afternoon each cost, and each fades over the hours that follow. The number you see at 6 pm is the number that's true at 6 pm. A COACH THAT KNOWS YOUR DATA Ask anything. "Should I train today?" "Why has my HRV been low this week?" "Build me 45 minutes with dumbbells." Coach answers from your last two weeks — not a generic script — and builds the session on the spot. Small questions are answered on your phone, without the network. HOW OLD IS YOUR BODY, REALLY? (Pro) Biological age from VO₂ max, resting heart rate, HRV, sleep, steps, exercise — and LDL and HbA1c once your bloodwork is in. See what's raising it and what's lowering it, tap any factor for the years it's costing you over time, and the habits that move it. YOUR BLOODWORK, READ AND ACTED ON (Pro) Photograph a lab report or import the PDF. Every marker is charted against its reference range and tracked across draws. Flagged results turn into one-tap changes: ease training while iron is low, raise fibre when LDL is high — each with a plain-English why. A heads-up, not a diagnosis. TRAINING THAT COUNTS WHAT YOU DID Sessions built by a coach, not a random generator: the lift that deserves you fresh goes first. Honest progression — only the sets you ticked count. Multi-week blocks that build, peak and deload. Cardio Load from your Watch, with your week measured against what the last four conditioned you for. FUEL THAT KNOWS WHERE YOU ARE Calories and macros as rings. Scan a barcode, snap a plate, read a restaurant menu, or just say it. Protein measured against your own pace at this hour, not a daily total. A week of meals planned around your targets and your training. BODY, THE WAY THE HEALTH APP SHOWS IT — THEN A SENTENCE Sleep, heart, body and movement, each in its own colour, each with its history. An eight-domain wheel that shows where you're even and where you're lopsided. Onyx notices resting heart rate creeping up and HRV drifting down a day or two before you feel it. ON YOUR WRIST The Watch app runs a session without your phone: your last and best weight on every set, a rest ring you can read across the rack, live heart rate, and a bedtime target in the evening. Nine widgets for Home Screen, Lock Screen and StandBy, each carrying your last week as a chart. PRIVATE BY DESIGN Health data stays in Apple Health. Food photos are read on your phone before anything leaves it. iCloud sync is yours alone. ONYX PRO Coach, bloodwork, biological age, menu reading and adaptive programming are part of Onyx Pro. Monthly, yearly and lifetime options; a free trial where available. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period and are managed in your Apple ID settings. Terms of Use: https://glib-cruiser-371.notion.site/Terms-of-Service-2faf53f04b21808bb5baf8f3bef139b0 Privacy Policy: https://glib-cruiser-371.notion.site/Privacy-Policy-2faf53f04b2180269281c97d08e7c2e6 Onyx is not a medical device and does not diagnose. Talk to your doctor about your results.

  • 5.0
    out of 5
    1 Ratings

Onyx 3.5 — the iOS 27 release. EVERY SCREEN, REBUILT ON GLASS Today, Fitness, Fuel and Body open on a soft field of colour with glass panes over it. Every signal is a big number over a real chart of your last week — sleep as bars, heart and weight as lines — grouped the way the Health app groups them. Fitness shows eight weeks of training time. Fuel shows seven days of calories and protein. HOW OLD IS YOUR BODY, REALLY? (Pro) Biological age, explained the way a good doctor would. What's raising it, what's lowering it, and — tap any factor — how many years it's costing you over time and the habits that move it. Eight signals feed it: VO₂ max, resting heart rate, HRV, sleep, steps, exercise, and your LDL and HbA1c once bloodwork is in. READINESS THAT KEEPS UP WITH YOU Your morning score is where the day starts; then the day spends it. A heavy session, a long walk, a stressful afternoon, protein far behind after training — each one costs, and each one fades over the hours that follow. At 6 pm, Onyx no longer tells you to go hard an hour after leg day. NINE WIDGETS, EVERY SIZE Today, Readiness, Training, Fuel, Sleep, Vitals, Steps, Streak and Biological Age — Home Screen, Lock Screen and StandBy. Each one carries your last week as a chart, not just today's number. THE WATCH, REBUILT Colour tells you how you are before a number does. Today's session starts in one tap and runs without your phone, with your last and best weight on every set. Rest drains a ring you can read across the rack, and in the evening the wrist says what time to be in bed. JUST SAY IT (iOS 27) "Start Upper A." "Log my usual breakfast." "Check my readiness." Quick answers come back without opening the app. Saved workouts and go-to meals show up in Spotlight, and food photos are read on your phone first. MEET DOT Coach's face in the app. He lives in the corner and reacts to what you do — a look, not a speech bubble. AND EVERYTHING ELSE • Today's cards are green when a change is in your favour, red when it isn't • Sleep, Activity and Vitals open on a ring, rings and a beating heart • Sessions: only ticked sets count, weight carries set to set, one Health entry per workout • The Watch no longer flickers during rest • Onboarding rebuilt — shorter, and it leads with the logo • iCloud sync now covers your weight goal, scanned foods and Dot • Dozens of fixes from living in 3.0 for two months

The developer, Matthew Miller, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Seller
    • Matthew Miller
    Size
    • 29.2 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 26.0 or later.
    • iPhone
      Requires iOS 26.0 or later.
    • iPad
      Requires iPadOS 26.0 or later.
    • Mac
      Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 26.0 or later.
    • Apple Watch
      Requires watchOS 26.5 or later.
    Languages
    • English
    Age Rating
    13+
    • 13+
    • Infrequent
      Medical Treatment information

      Contains
      Health or Wellness Topics
    In-App Purchases
    Yes
    • Onyx Pro Monthly $4.99
    • Onyx Pro Lifetime $79.99
    • Onyx Pro Yearly $39.99
    Copyright
    • © TheMillerBrand