AURA Strap 2 review — Turn your Apple Watch into a body-composition tracker
If you use an Apple Watch for workouts and health tracking, the AURA Strap 2 promises a simple upgrade: a strap that measures body composition (fat, muscle, and water levels) so you can set smarter goals and monitor progress beyond the scale. In this review I break down what the strap does, how it performs in everyday use, and whether it’s worth adding to your Apple Watch setup.
Quick overview — what is the AURA Strap 2?
The AURA Strap 2 is an Apple Watch strap that adds body composition tracking to your watch. It’s designed to replace your existing band and provide metrics like body fat, muscle mass, and hydration levels directly through the strap’s sensors and companion software. Available colors include Coal Black, Summer Gray, Crimson Red, and Navy Blue, and sizes match common Apple Watch case sizes (42mm/41/40/38mm and 46/49mm/45/44/42mm).
Key features and real-world benefits
Body composition tracking (fat, muscle, water)
What it measures: the AURA Strap 2 reports body fat percentage, estimated muscle mass, and water level. These metrics give a clearer picture of fitness changes than weight alone.
- Benefit: See if weight changes are fat loss, muscle gain, or fluid shifts — useful when dieting or training.
- Benefit: Track trends across weeks instead of relying on daily scale noise.
Seamless Apple Watch fit and multiple color options
The strap replaces your current Apple Watch band and comes in four colors to match your style. It’s offered in sizes that correspond to popular Apple Watch case sizes, so getting a correct fit is straightforward.
- Coal Black, Summer Gray, Crimson Red, Navy Blue — choices for both casual and sporty looks.
- Two size groups cover most Apple Watch models, simplifying selection.
Set goals and track progress
A key selling point is the ability to set body composition goals and watch progress directly tied to workouts and nutrition adjustments. For users focused on performance or body recomposition, this creates a feedback loop that’s more actionable than steps or heart rate alone.
Design, comfort, and daily wear
The AURA Strap 2 is designed to be worn like a regular band. The profile aims to balance sensor placement with comfort so you can wear it throughout the day and during workouts.
- Benefit: Continuous wear means more consistent baseline readings when you measure.
- Benefit: If you exercise with your watch, the strap doubles as both tracker and accessory.
How it feels in real use
After switching from a standard Apple Watch band, the strap behaves like any quality silicone/soft-touch band: secure during activity, and simple to install. Measurements are quick, and the app interface presents trends and goal tracking in a way that’s easy to interpret on a phone.
“Tracking body fat and muscle together helped me fine-tune my training — I could see when I was losing water after long workouts versus losing muscle.”
Accuracy and limitations — what to expect
Body composition measurements from straps, scales, and wearables are useful for trends but can vary from clinical methods. Expect consistency to be the strength here: the strap can reliably show direction and rate of change when you measure under similar conditions over time.
- Tip: Measure at the same time of day and under similar conditions (hydration, meals) for the most consistent comparisons.
- Reality check: Single measurements can drift; use the strap for trends and goal tracking rather than as a medical diagnostic tool.
Specifications & quick facts
| Product | AURA Strap 2 |
| Price (MSRP) | $159 |
| Colors | Coal Black, Summer Gray, Crimson Red, Navy Blue |
| Apple Watch sizes | 42mm (41/40/38mm) and 46/49mm (45/44/42mm) |
| Availability | Often sells out on the official store — check stock before planning purchase |
Pros and cons
- Pros: Adds body composition tracking to Apple Watch without changing your workflow; clear trend data; multiple color options; useful for training and diet adjustments.
- Cons: Not a medical-grade measurement — use for trends; availability can be limited; price is a premium over a regular strap.
Who should buy the AURA Strap 2?
Recommended if:
- You want more than weight and activity metrics — body fat, muscle, and water provide actionable insights.
- You already wear an Apple Watch for workouts and want a single device that combines watch and body-composition tracking.
- You’re tracking a body recomposition goal (losing fat while gaining or preserving muscle) and need regular trend feedback.
Not recommended if:
- You need clinical-grade body composition data for medical reasons.
- You want the cheapest strap — this is a functional accessory with a premium price.
- You rarely wear your Apple Watch during workouts or most days — the strap’s value comes from regular use.
Final verdict
The AURA Strap 2 is a focused accessory that meaningfully extends what your Apple Watch can do. For athletes, gym-goers, and anyone serious about body composition, it turns sporadic weight checks into usable trend data that supports better decisions about training and nutrition. It isn’t a replacement for clinical testing, but as a daily tool for progress tracking it’s convincing.
If you want deeper insight from your wearable and you’re willing to invest for convenience and consistency, the AURA Strap 2 is worth considering. If you need medically precise measurements or you rarely use your watch, stick with more affordable bands or clinical testing options.
Bottom line
Smart, comfortable, and practical for tracking progress — AURA Strap 2 is best for Apple Watch users who want consistent body-composition trends and actionable fitness data, not for users needing clinical accuracy.
Get code here 10% OFF: AURA Devices
