1500 + professional weightlifters, coaches, university programs, and fitness enthusiasts across more than 15 countries.
Built for people who want to get stronger
Calibrex is a wearable coach for strength training. It automatically tracks reps, speed, and power, and gives you real-time feedback through the app. No manual logging required.
Each workout is tailored based on your goals, available equipment, and previous data points.
Start your workout with one tap
Expert guidance, every step
One wearable tracks everything - gym equipment, bodyweight and free weights.
Always train with confidence. Know when you should push a bit harder and when to pull back a bit. Real-time feedback keeps you honest. All based on the latest VBT science.
Personalized planning
A plan that evolves with you: automatic daily adjustments based on your real data and readiness.
Every rep reviewed
Know exactly how you're progressing. You vs. You.
Train smarter & safer
Your coach always puts your health and safety first.
Testimonials
Calibrex Champions
I didn't think you can do a guided workout class without a trainer. I started laughing the first time I heard it speak out loud but a few reps in I felt like I was in a private workout class.
— Lauren GCalibrex Member
It felt so strange at first that I didn't need to use my phone at between sets. It tracks all my reps, tells me what to do next and counts me down!
— Helen PCalibrex Member
Hardware shipped quickly and set up was easy, don't need anything beyond whats in the box. Gives me great insights into where I'm at and when it's time to lift heavier. I finally put these dusty dumbbells to use lol
— Andrew GCalibrex Member
I went from being shy to doing full blown strength workouts all by myself within 2 weeks!
— Penny ACalibrex Member
Glad to see something for weights in the fitness tracker space this has given me all the data I could reasonably ask for, new features roll out continually, etc. Name another wearable option for lifting at this price point?
— Kyle BCalibrex Member
Planning workouts in my biggest nightmare when it comes to going to the gym. This gives me a new workout, all I have to do is show up.
— Georgia TCalibrex Member
I've been going to the gym for 3 years and for the first time in a while I got stuck in a plateau. Can't rely on the same ol' split every time. Lifting has become more fun now that I have numbers to compare from each session.
— Tyler PCalibrex Member
I'm a calisthenics guy so I mainly use the body clip to track my workouts. Honestly the automatic rep tracking and set countdown are godsent. Exactly what I needed for progressive overload.
— Jacob MCalibrex Member
FAQs
If you don't find an answer to your question, feel free to reach us via the chat bubble on the bottom right of your screen. We'll get back to you super fast :)
Can I use Calibrex without a subscription?
Yes. The Calibrex Membership is not required to use Calibrex.
Calibrex Membership unlocks the full potential of the Calibrex App, allowing you to access detailed insights, personalized guidance and live audio coaching during your lifts.
Without a membership, your Calibrex can be used with limited functionality such as core live lifting metrics, custom workouts and basic analytics.
The Calibrex Premium membership price is $100/year (that's 27¢ per day).
Is it beginner-friendly or just for serious lifters?
Both. Whether it’s your first time strength training or you’ve been lifting for years, Calibrex adapts to your experience level and goals. The app’s AI calibrates to your performance and provides tailored recommendations from day one.
Can I create my own custom workouts?
Yes. You can create your own custom workouts very easily, and still have all the benefits of the live audio coaching.
What makes Calibrex different from other wearables like Apple Watch, Fitbit, Oura or Whoop?
Calibrex is the only wearable built specifically for reps & strength training.
Instead of tracking passive health stats, it gives you real-time coaching on rep speed, form, and fatigue—so it feels like a personal trainer is with you every set.
How does Calibrex actually know what I’m doing during a workout?
Calibrex uses a proprietary sensor system combined with AI to detect your movement patterns, rep velocity, rest timing, and more. It can even tell what exercise you're doing—whether you're benching, squatting, or curling—and coach you in real time.
Do I need a gym to use Calibrex?
Not required – Calibrex meets you where you train. You can use it with home dumbbells, bodyweight exercises, and resistance bands. It’s compact, portable, and designed to go wherever you train. Just like the worlds best personal trainer, it will give you a tailored workout plan based on your available equipment, previous data points and overarching fitness goal.
How long does the battery last?
Calibrex lasts up to 3 weeks on a single charge with regular use (4 workouts/wk). Charging takes less than an hour, and you’ll get a heads-up before it ever runs low.
Is Calibrex covered under warranty?
Yes, your brand new Calibrex is backed by our 2-year warranty. We understand how important it is to you to be able to use your Calibrex during every single workout.
Does it work on iOS & Android?
Yes, the Calibrex app is available on both iOS and Android.
Do you ship internationally?
Yes. Calibrex has been shipping internationally since 2021, and we have devices deployed in over 15 countries. In fact, about 20% of our total userbase is international.
We collect duties and taxes upfront, and the Calibrex will be delivered in 2-5 business days depending on your choice at checkout. No customs hassle. Prices are calculated in real-time at checkout to lock in the lowest price possible.
