Real-time coaching: ✔️ Unlimited workout content ✔️ Real-time audio coaching ✔️ Rep weight, set rest and rep intensity recommendations ✔️ Calorie Burn Data ✔️ 3D form tracking
Analytics: ✔️ Weekly and monthly performance reports ✔️ Post workout analysis & sharable stats ✔️ Compare stats with friends ✔️ Access to Rankings & Teams
Sharing: 👤 Share with 1 extra family member or friend for free ✔️ Film video with real-time workout data overlay options
Your C3 coach will guide you through your workout from start to finish!
You'll be matched with a perfect workout based on your available equipment, time, goals and previous Calibrex data.
Always know:
How much weight you should be lifting
How fast you should be training
How long you should rest between sets
Workout Anywhere, Anytime
Work out on your terms. Calibrex 3 weighs less and is smaller than a AA battery. Whether you have access to a full gym, or no equipment at all, your Calibrex 3 coach will give you the best workout possible based on your overarching fitness goal and previous workout data.
Save over $15,000/year
On average, personal training costs $15,600/yr or $100 per session.
The C3 Annual AI Membership ($69) comes out to ~$0.48 per live training session if you train 3x/week.
Calibrex 3
Calibrex 3
$376.00
Train with the world's best personal trainer anywhere, anytime.
15,600$
Average annual personal training cost for 2-3 sessions per week
1.96/week$
Calibrex 3 membership per week
➡️ Calibrex costs over 100 times less than traditional personal training.
➡️ Calibrex uses your real data to build a unique profile and match you with the best workouts possible.
➡️ Calibrex is on your schedule. Summon your Calibrex 3 and Train Smarter anywhere, anytime.
Need help?
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Contact Us
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Get the highlights
Real-time Audio Guidance
A First-of-its-kind Workout Tracker
Over 20M Reps & Counting
Trusted by fitness enthusiasts in 17 countries and trusted by top universities.
Calibrex 3 User Testimonials
Early Adopters Love Calibrex 3
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 3 Beta 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 3 Beta 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 3 Beta Member
I went from being shy to doing full blown strength workouts all by myself within 2 weeks!
— Penny ACalibrex 3 Beta 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 3 Beta 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 3 Beta 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 3 Beta 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 3 Beta Member
FAQs
If you don't find an answer to your question, feel free to reach us via the intercom bubble on the bottom right of your page. Philip or Nick will get back to you super fast :)
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.
Real-time coaching: ✔️ Unlimited workout content ✔️ Real-time audio coaching ✔️ Rep weight, set rest and rep intensity recommendations ✔️ Calorie Burn Data ✔️ 3D form tracking
Analytics: ✔️ Weekly and monthly performance reports ✔️ Post workout analysis & sharable stats ✔️ Compare stats with friends ✔️ Access to Rankings & Teams
Sharing: 👤 Share with 1 extra family member or friend for free ✔️ Film video with real-time workout data overlay options
What makes Calibrex 3 different from other wearables like Apple Watch, Fitbit, Oura or Whoop?
Calibrex 3 is the only wearable built specifically for 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 3 actually know what I’m doing during a workout?
Calibrex 3 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 to wear it on my wrist for every workout?
Nope. Calibrex 3 was designed to move with you. It magnetically detaches and can be placed directly on your barbell, dumbbell, or cable machine—wherever gives the best read for your lift.
Can Calibrex 3 help me lift heavier or get stronger?
Yes. By tracking your power output and rep speed, Calibrex 3 tells you exactly when to push harder or back off. It’s the fastest way to stop guessing and start progressing—backed by science and used by pro athletes.
What kind of training programs are included in the app?
You’ll get access to AI-driven workouts personalized to your goals—whether it’s building strength, power, muscle, endurance or training for longevity. Over time, the system adapts and evolves with you based on your actual performance.
Do I need a gym to use Calibrex 3?
Not necessarily. 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.
What happens if I miss a workout or take a break?
No guilt, no judgment. Calibrex tracks your progress over time and adjusts your recommendations based on how you’re feeling when you return. It's built to help you stay consistent—not perfect. It also won't charge you for cancellation or no show fees 😎
How long does the battery last?
Calibrex 3 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 3 covered under warranty?
Yes, your brand new Calibrex 3 is backed by our 2-year warranty. We understand how important it is to you to be able to use your Calibrex 3 during every single workout.
Does it work on iOS & Android?
Yes, the Calibrex 3 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 21 countries with Calibrex 2 & Calibrex 3. In fact, almost 20% of our total userbase is international.
We collect duties and taxes upfront, and the Calibrex 3 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.
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