Cubex Fitness: AI Coach
Workout plans, HR & tracker
Free
Start in 60 seconds: answer a few questions and get the AI-built program that fits you. One-button workouts, live heart rate, Apple Watch — all 100% free.
250+ AI-built workout programs, live heart rate on your wrist and screen, and a full training journal — free, offline, no account. Nothing locked, ever.
Answer a few quick questions and Cubex matches you with the AI-built program that fits your goal, level, and equipment — you're training within a minute of opening the app.
Cubex Fitness was built by a former professional athlete and amateur boxer who got tired of apps that promise miracles and lock the real features behind a paywall. This one is different: everything is included, everything is free, and the only thing that creates results is your own consistency.
WHAT'S IN THE APP
• Personalized start: tell the app your goal, level, and where you train — it recommends the right AI-built program and gets you into your first workout in under a minute.
• 250+ AI-built workout programs, designed and balanced by AI for different ages, for men and women, from beginner to pro level.
• 300 exercises covering 14 muscle groups and 24 equipment types, with clear guidance and a one-tap YouTube video demo for every movement.
• Live heart rate while you train — connect Apple Health and see your pulse right on the workout screen, with heart-rate history saved into your journal.
• One-button workouts — the whole session runs on a single button: one tap moves you through sets, rest, and exercises. The app decides what's next; you just press GO.
• Apple Watch app — your session mirrored on the wrist: exercise, set, timers and the GO/REST button that drives the workout. It launches itself when you start training and keeps recording your heart rate.
• Live Activities & Dynamic Island — run your whole session from the lock screen with a single button. No unlocking, no thinking.
• Super-sets: group exercises back-to-back with no rest between them, exactly like on a real training floor.
• A real session engine: rep sets and timed sets, per-exercise rest timers, live calorie burn, and Easy or Advanced mode depending on how much control you want.
• Free Workout mode: start an empty session and build it as you go.
• Adaptive step goal that starts at 5,000 steps a day and grows with you as you keep hitting it.
• Train for any goal: burn fat, build muscle, increase stamina, improve flexibility, tone your body, stay fit, or recover from injury.
• 11 training styles: gym, home, outdoor, CrossFit, functional, cardio, boxing, HIIT, stretching, recovery, and yoga.
• A full workout journal and history of everything you've done, set by set.
• Progress charts and goals: weight, calories, per-exercise records, and body measurements.
• Built-in Timer and Tabata for fast, focused sessions.
• Make it yours: build your own programs, workouts, and exercises, and design custom charts and goals.
WHY CUBEX FITNESS IS DIFFERENT
Built by an athlete, not a marketing team. The programming comes from someone who actually trained and competed.
Genuinely free. No hidden fees, no locked "premium" features, no subscription, no ads. The whole app is yours.
Works offline, no account required. Your data stays on your device — all your activity, history, heart rate, and measurements are stored locally. Your progress belongs to you.
One app instead of a stack. Cubex Fitness replaces an AI coach, a heart-rate monitor app, and a paper notebook, so your daily training has everything it needs in one place.
You shape what's next. Need a feature? Ask the team and leave a review — good ideas land in future updates.
Available in 12 languages.
Download Cubex Fitness, start training, and let your consistency do the talking.
Fixed an issue where the app could sign you out unexpectedly after being in the background for a while. Your data and sync are unaffected. Minor improvements.
The developer, Oleksandr Neiko, 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 Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Contact Info
- User Content
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Oleksandr Neiko
- Size
- 185.4 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.2 or later.
- iPhone
Requires iOS 18.2 or later. - Apple Watch
Requires watchOS 9.0 or later.
- iPhone
- Languages
English and 11 more
- English, French, German, Hindi, Indonesian, Japanese, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- Copyright
- © 2026 Cubex Fitness