
We may earn a commission for purchases using our links. Learn more.
Updated July 1, 2025: Get 15-Day Risk-Free Returns when you buy direct from Aura Devices → CLICK HERE.
You already track your heart rate, sleep, steps — maybe even stress.
But there's one thing most wearables don't measure:
Your actual body.
Not just how much you weigh. But how much of you is muscle, fat, water, bone, and protein...
The good stuff that actually matters when you're working on your health.
That's where the AURA Strap 2 comes in.
It's a smart band that snaps onto your Apple Watch and turns it into a full-body composition tracker.
Plus it pairs with the best fitness tracking app I've ever used. One that leverages the data that the AURA Strap pulls.
Whether you're in a cut, bulking, or just want better insight, AURA makes it easy to check your numbers wherever you are.
Fitness Accessories

AURA Strap 2
The Ultimate Fitness Upgrade For Your Apple Watch
This simple addition to your Apple Watch helps you:
- Building muscle
- Cut fat
- Lose weight
And gives you insights no other fitness wearable can give you.

Here's Why I Love The Aura Strap:
1) Tracks Body Fat, Muscle & Hydration — From Your Wrist
You don't have to strip down and step on anything.
The AURA Strap 2 uses the same kind of bioelectrical impedance tech found in expensive smart scales and fitness labs.
But instead of running current foot-to-foot, it runs it hand-to-hand, straight from the watch band.
That means it can measure:
- Body fat %
- Muscle mass
- Hydration levels
- Visceral fat
- Lean body mass
- Protein %
- BMI (Body Mass Index)
All from a 30-second reading, no bathroom trip needed.

2) Works Seamlessly with Your Apple Watch
No clunky apps, weird cables, or new devices to charge.
Just swap your current band for the AURA Strap 2 and pair it with the AURA App. It connects to your Apple Watch via Bluetooth Low Energy and syncs all your readings to Apple Health.
It feels like a native feature — not an add-on.
You can see trends over time, set goals, and even get personalized insights if you opt into AURA Plus.

3) Built for People Who Actually Train
This isn't some gimmicky "fitspo" wearable for the occasional dog walk.
The AURA Strap 2 is designed for people who actually care about their health data — people training for something, working on body recomposition, or managing hydration before and after tough workouts.
A few things that make it gym-ready:
- Sweat-resistant and water-resistant (up to 50cm)
- Replaceable coin cell battery lasts ~6 months
- Slimmer and more durable than the original AURA Strap
- Works with weights, CrossFit, endurance training, and more
It doesn't buzz or nag. It just gives you the data and gets out of the way.

Six Months of Battery Life
There's no "new thing you have to worry about charging."
The Aura Strap runs on a coin battery that lasts six months and takes under a minute to change.
4) It's More Accurate Than You Think
Bioimpedance gets a bad rap because most people use cheap scales that give wildly different readings based on hydration, timing, and how you stand
But AURA tested their device) against DEXA scans, the gold standard for body composition — and found a 95%+ correlation.
Translation: You're getting legit measurements from your wrist.
Just make sure you're consistent with your readings (same time of day, same posture), and you'll get useful trends you can actually work with.

5) Track Progress Anywhere — Even at the Gym
Smart scales are great, but they live in your bathroom.
The AURA Strap 2 gives you access to AURA Plus.
This is by far the best fitness tracking app I've ever used.
It gives you access to:
- Body Composition
- Monthly Reports on calorie intake, workouts, meals, etc.
- Tailored Advice for your goal
- Personalized exercise plans and videos
- Bioelectrical Impedance Analysis Charts
All from your phone or Apple Watch
It's one of the easiest ways to stay on top of your progress — without being tied to one location.
And, because it syncs straight to Apple Health, you can keep all your training and health data in one place.
Final Thoughts
The AURA Strap 2 turns your Apple Watch into something way more powerful than just a step counter.
If you care about what your body is made of, not just what it weighs, this is an easy upgrade.
It's compact, reliable, and built for people who want smarter insights without switching devices.
No fluff. Just real feedback from your body.

Fitness Accessories

AURA Strap 2
The Ultimate Fitness Upgrade For Your Apple Watch
This simple addition to your Apple Watch helps you:
- Building muscle
- Cut fat
- Lose weight
And gives you insights no other fitness wearable can give you.
Evan Rhodes
The MustHave Writer
10 Reviews
AgentQ
Tue Aug 1, 2023
As a personal trainer, I would say this isn't that bad. I know not to take the reading as 100% accurate, but I can say the trend will be spot on. For example, if my body fat% is trending down and lean muscle mass is up, I know I must be heading in the right direction and vice verse. I also only wear it to take a reading or two then swap it out for my regular band
Ivan
Tue Jul 1, 2025
To my mind that's an excellent and comfortable strap which easity connects to my apple watch.
Lori
Sun Sep 3, 2023
I ordered this AURA STRAP 2 for my iwatch so I can calculate and keep track of my BMI, as well as fat percentage and other measurements.
The instructions are easy to follow, and it is easy to download the app on your phone and iwatch. Taking a measurement every day around the same time is recommended. It is very simple to do by placing the bottom of your watch on your other palm near/below your thumb. This gives you your BMI as well as minerals, water percentage, muscle mass, protein and lean mass.
Included with this AURA strap 2 is also a special guitar pic that you can use to remove the cover to change the battery or loop replacement. Also included are three extra sets of straps, size M, XL and XXL size.
I love that the stretchable silicone straps have an infinite loop and don't have any clasps to deal with. This strap will give me the tools so that I can track my progress and keep a better eye on my health.
Fitness Accessories

AURA Strap 2
The Ultimate Fitness Upgrade For Your Apple Watch
This simple addition to your Apple Watch helps you:
- Building muscle
- Cut fat
- Lose weight
And gives you insights no other fitness wearable can give you.