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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   Product

AURA Strap 2

5 / 5

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.

Aura
Source: Aura

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.

TRY AURA STRAP TODAY

Aura Strap 2.1 Fitness Wearable
Source: Aura

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.

Aura Strap Fitness
Source: Aura Devices

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.

TRY AURA STRAP TODAY

Aura
Source: Aura

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.

TRY THE AURA STRAP RISK-FREE

Aura   9.
Source: Aura

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.

TRY THE AURA STRAP TODAY

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.

TRY THE AURA STRAP TODAY

Aura
Source: Aura

Fitness Accessories

Aura   Product

AURA Strap 2

5 / 5

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.

5 / 5

Evan Rhodes
The MustHave Writer

SHOP AURA STRAP

10 Reviews

AgentQ

Tue Aug 1, 2023

5 / 5

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

5 / 5

To my mind that's an excellent and comfortable strap which easity connects to my apple watch.

Lori

Sun Sep 3, 2023

5 / 5

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.

Demi Kitty

Sun Jul 10, 2022

5 / 5

interesting and accurate measurements every time. the results have been giving me information that's very useful to me, no silly fluff, just the important things compiled for my exercise record

Sad Eyes

Tue Jul 1, 2025

5 / 5

This watch band is really simple to use. I have an Apple Watch 8, 45 and the band fit straight out of the box. There are several different bands that are included so you can get one custom for your specific model.

You pull the protecting tab to the battery, attach the watch band l, download the app and you're ready to go.

I had to enter in my age, height and weight. It seems accurate as far as body fat composition, but I don't have anything to go on as far as the protein, minerals or water levels. I'm hoping that's accurate as well.

The band is comfortable, but I will not be using it for every day use. I plan on changing out the bands when I do my measurements.

If this works correctly, I think it's a very neat device. It has a guest mode so if you wanna let someone else analyze, it'll do so without saving over top of your records, which I thought was a nice feature.

Amazon Customer

Tue Jul 1, 2025

5 / 5

I can't pretend to understand exactly how this Aura device works but I've been using it for a few weeks now and I like it. It's nice to have health stats for fat and muscle if you're actively trying to make changes to those numbers, and learn about things like "visceral fat" which I hadn't considered before. And very nice that all you need is a new watch strap to do it! It's syncing with Apple Health well and measurements seem to be within a few percentage points of the previous reading which tells me it's pretty accurate. It's easy enough to give readings-- you just have to make sure to hold your arms in the position shown. It's fool proof. The watch faces are nice as well to keep track of things visually. This is an Apple watch upgrade without upgrading your watch. Highly recommended for anyone who works out!

Edward V.

Tue Jul 1, 2025

5 / 5

I just started getting into more fitness with my insurance providing me more benefits to gym memberships and fitness trackers etc. I've had a lot of insight into my daily activities using a FitBit and keeping track of my steps, calories burned, etc. I thought taking a plunge into some deeper diagnostics with BMI and such might be a good idea as well.

I'm not sure of the accuracy of this device as I don't have access to the professional scanning equipment like trainers or fancy gyms have to compare it to, but it does provide me with daily body information. It's cool to see how BMI and fat changes through the days and weeks, especially when you make changes to your diet or exercise; Being able to see what works and what doesn't is a great tool to have.

I feel like this device would be quite useful for more serious body builders or people who want to reach a target number with their body stats, but for an amateur like myself, more information I can get from these readings is better than none. Assuming the accuracy is correct, I feel like I can make more proactive choices in my exercising routines and diet changes.

Melissa

Tue Jul 1, 2025

5 / 5

This is a really cool product! Now I can Keep track of my BMI & weight loss journey. This will Keep me focused and on track..The set up was easy. This is a good quality make product.the silicone straps fit perfect on my wrist.

Carlex

Tue Jul 1, 2025

5 / 5

So far setup was somewhat easy but i don't see myself wearing or using this often due to the design of slip on/off and it being tight on wrist. I feel it limits my wrist movement. When using it, it does work and takes my measurements to what seem accurate. I can't really say since i don't have another device to confirm it with. I am curious to see how long the battery will last if its used everyday. Only time will tell. I am using it on weekends and no issues with battery. Overall its great if you don't mind the strap being slip on and tight. Didn't drop the stars since its not the devices fault on my preference but i do wish there was other options.

Marcos A

Mon Jan 10, 2022

5 / 5

I try to work out every day, and I really like to know if I'm improving. Now with this device, it has given me data to maintain lasting results. With this I can know my muscle weight, percentage of lean mass, percentage of fat, proteins and especially "water". All this in a simple and practical way. The app keeps me informed and I can improve each of these items. For me it has helped a lot, it has been very important to know if I am gaining or losing mass and fat. This has helped to build a better body and especially to realize the need to improve.

Reviews sourced from verified Aura Strap customers.

Fitness Accessories

Aura   Product

AURA Strap 2

5 / 5

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.