Cubex Fitness AI Workout Coach

Build muscle, burn fat, or get fit — at the gym or at home — with 250+ AI-built workout plans, live heart rate, and a full training journal. 100% free: no ads, no subscription, no account.

Answer a few quick questions and Cubex matches you with the AI-built program for your goal, level, and equipment — training within a minute of installing.

Cubex Fitness was built by a former pro athlete and amateur boxer, tired of apps that promise miracles and lock real features behind a paywall. So everything here is free and included — the only thing that creates results is your consistency, and this app is built to protect it.

WHAT'S IN THE APP

• Personalized start — your goal, level, and where you train pick the right AI-built program, and you're in 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 — a full library 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 Health Connect and see your pulse on the workout screen. Works with Samsung Health and Galaxy Watch; history saves 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.
• Super-sets — group exercises back-to-back with no rest between them, exactly like on a real training floor.
• Control workouts from the lock screen — a live session card with full controls, plus an Android 16 Live Updates status-bar chip with your set and timer, like navigation apps.
• Home-screen widget — your next workout one tap away, and full session controls with a live timer while you train.
• A real session engine — rep sets and timed sets, per-exercise rest timers, live calorie burn, and Easy or Advanced mode.
• Free Workout mode — start an empty session and build it as you go.
• Adaptive step goal — 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.
• Full workout journal & history — every set of every session, saved. It replaces your paper notebook.
• Progress charts & goals — weight, calories, per-exercise records, and body measurements, each with goals.
• Built-in Timer & Tabata — for fast, focused HIIT sessions.
• Make it yours — build your own programs, workouts, and exercises, plus 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. Activity, history, heart rate, and measurements are stored locally; your progress belongs to you.

One app instead of a stack. Cubex replaces an AI coach, a heart-rate monitor, and a paper notebook — everything your daily training needs in one pack.

ONE APP FOR EVERY KIND OF TRAINING

Use Cubex as a gym workout planner, home workout app (no equipment needed), weight-lifting log, 5x5 or push/pull/legs tracker, HIIT and Tabata timer, boxing or CrossFit app, stretching and yoga guide, or offline workout journal. From beginner workout plans to advanced bodybuilding splits — for men and women, from weight loss to muscle building.

You shape what's next. Live workouts with an AI Coach are on the way. Need something else? Ask the team and leave a review — good ideas land in the next updates.

Available in 12 languages.

Download Cubex Fitness, start training, and let your consistency do the talking.