Apple Watch · Wear OS

Leave your phone in your locker.

Herculex on your wrist delivers zero-friction workout logging, tactile rotary controls, and smart haptic rest timers — built natively for watchOS and Wear OS.

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Interactive Simulator: Tap the −/+ buttons on the watch display, complete sets, and test rest timer haptics in real time.
SwiftUI Native · Apple Watch Series 4 through 10 & Ultra

Features hardware Digital Crown rotary tuning for weights and reps, Smart Stack glanceable widgets, and continuous WorkoutKit/HealthKit heart rate tracking that never leaves your device.

Jetpack Compose for Wear · Samsung Galaxy Watch & Google Pixel Watch

Engineered with Samsung One UI 9 Watch ergonomics, rotary bezel SetBezel arcs, custom Wear OS Tiles, and tactile haptic pulses that let you train without looking at your wrist.

Engineered for the wrist

Everything you need between sets.

Built from scratch for watchOS and Wear OS — not a stripped-down phone webview.

Standalone

100% Offline & Standalone

Leave your phone in your gym locker. Start, log, and complete full workouts with full exercise history stored locally on your wrist.

Precision

Tactile Rotary Controls

Spin the Apple Watch Digital Crown or turn the Galaxy Watch bezel to dial in weights and reps with precise haptic clicks — even with chalk on your hands.

Automation

Haptic Rest Timer

Finishing a set triggers your programmed rest interval immediately. A distinct double-pulse vibration taps your wrist when it is go-time.

Biometrics

Live Heart Rate & Vitals

Continuous optical sensor monitoring with real-time HR zones, recovery dips, active workout calories, and nervous system readiness feedback.

Glanceable

Complications & Tiles

Add your active fasting timer, remaining macro targets, or today’s scheduled routine directly onto your favorite watch face.

Privacy

Zero Health Cloud Leaks

Biometric telemetry from Apple Health and Health Connect stays strictly on your watch and phone. We never upload your raw health vitals to cloud servers.

Dual ecosystem support

Built natively for both platforms.

We embrace the unique hardware traits of each ecosystem instead of forcing a generic design.

Apple Watch

watchOS 10.0+
SwiftUI Native

Compatible with: Apple Watch Series 4 through 10, SE & Ultra

  • Digital Crown precise weight & rep scrolling
  • Smart Stack widgets for fasting & calories
  • Native WorkoutKit & HKWorkoutSession telemetry
  • Background execution with screen-off haptic pulses
  • NowPlaying music control right from your workout

Android Watch

Wear OS 4.0+
Jetpack Compose

Compatible with: Samsung Galaxy Watch 4/5/6/7/Ultra, Google Pixel Watch 1/2/3

  • Rotary bezel input with signature SetBezel dial
  • Custom Wear OS Tiles for single-swipe glance
  • Health Connect integration for steps & HR
  • OneUI-inspired oversized touch targets for sweaty fingers
  • Autonomous SQLite sync with phone database

Watch FAQ

Wrist workout questions.

Everything you want to know about using Herculex on Apple Watch or Wear OS.

Do I need my phone with me while working out?

No. Both the Apple Watch and Wear OS apps are fully standalone. You can leave your phone in your locker or at home. All your sets, weights, reps, and rest timers are recorded in the watch’s local storage and synchronize automatically with your phone once you are back in range.

Does the rest timer vibrate if my watch screen is off or in Always-On mode?

Yes. The rest timer runs as an active foreground workout session on both platforms, utilizing native system vibration notifications that deliver a crisp haptic tap to your wrist the exact second your rest ends.

How does set input work on a small screen?

We designed the logger specifically for gym ergonomics: giant high-contrast touch targets, quick +/− adjustment buttons, and full support for hardware rotary dials (the Digital Crown on Apple Watch and the rotating bezel or crown on Wear OS).

Can I log advanced set types like Drop Sets or Myo Reps from the watch?

Yes. Herculex on your wrist supports warm-up sets, working sets, drop sets, rest-pause sets, and myo-reps with color-coded badge indicators and automated rest adjustments.

Take Herculex into your next session.

Track your training on your phone, your computer, and your wrist.

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