Cubex Fitness reads heart rate from your phone's health platform — Apple Health on iPhone, Health Connect on Android — and shows it live during your session, with your training zone. Your health data stays on your device; the app has no server and no account.
⌚ You need something that measures pulse: an Apple Watch, Galaxy Watch, or any fitness band/watch that writes heart rate into Apple Health or Health Connect. The phone alone can't measure your pulse.
iPhone — Apple Health
Open Cubex Fitness → on the Dashboard, find the Vitals card and tap Continue.
iOS shows the Apple Health permission sheet: enable Heart Rate (and Steps if you want the step goal) → Allow.
That's it. Your watch keeps writing pulse to Apple Health as usual; Cubex reads it live during workouts.
Changed your mind later? Manage it in Profile → Health data inside the app, or in iOS Settings → Health → Data Access.
Android — Health Connect
Make sure Health Connect is on your phone (newer Android versions ship with it; otherwise it's free on Google Play).
Open Cubex Fitness → Dashboard → Vitals card → Continue.
Health Connect asks which data Cubex may read: allow Heart rate (plus Steps, Distance, Active calories if you want the full dashboard).
Samsung Health & Galaxy Watch
Works well — verified on Galaxy Watch + Samsung phones. The chain is: Galaxy Watch → Samsung Health → Health Connect → Cubex.
In Samsung Health: Settings → Health Connect → turn on syncing (heart rate, steps).
Then do the Health Connect steps above.
Wear the watch during your workout — your pulse shows up live on the Cubex session screen.
What you get during the workout
Live BPM on the session screen with a zone label (e.g. "Zone 1 – Recovery") — train in the right zone without checking your wrist.
Heart-rate history saved into the workout journal with each completed session.
Not seeing a pulse?
No wearable = no heart rate. Steps can come from the phone, but pulse needs a watch or band actively measuring it.
Check the watch is actually recording (start a workout on the watch, or enable continuous heart-rate tracking in its settings).
Re-check permissions: Apple Health → Data Access (iPhone) or Health Connect → App permissions (Android).
Samsung users: confirm Samsung Health ↔ Health Connect sync is ON — it's off by default on some phones.