# Embr Wave 2 vs The90 Gem

The clearest difference is ads: The90 Gem at none against Embr Wave 2's shown. The90 Gem also leads on monetization model (free vs free with in-app purchases) and update cadence (every 3 weeks vs every 2 months). Embr Wave 2's advantage is rating (4.8 vs 4.3) and ratings volume (4K vs 9). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Embr Wave 2 holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Embr Wave 2 has 4K ratings behind it against 9, so its average is the more settled of the two. Written reviews complicate that: 72% of Embr Wave 2's written reviews are positive against 86% of The90 Gem's, so the app with the better star average is not the one people write more warmly about.

Embr Wave 2 ships an update every 2 months, The90 Gem every 3 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Embr Wave 2 | The90 Gem |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4K ratings)](https://appshunter.io/ios/app/embr-wave-2/id1563878390/reviews)** | [4.3 (9 ratings)](https://appshunter.io/ios/app/the90-gem/id6758100822/reviews) |
| Number of ratings | **4K** | 9 |
| Positive reviews | 72.4% of reviews | **85.7% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 50 MB | 112 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Embr Labs Inc.](https://appshunter.io/developer/1205495904) | [The90, Inc.](https://appshunter.io/developer/1870863367) |

## What reviewers say

### Embr Wave 2

[App page](https://appshunter.io/ios/app/embr-wave-2/id1563878390)

Control a wearable thermal device to manage temperature discomfort, stress, and improve sleep. Explore custom sessions, personalize settings, and track usage for better well-being.

**Highlights:** Explore thermal sessions for sleep, relaxation, and focus, Personalize device button programming, Customize temperature and session duration, Schedule automatic cooling and warming sessions, Track device usage and learn about your body, Receive app and firmware updates

**In-app purchases:** none

**What reviewers like**

- 🚀 Effective at cooling/warming
- 👍 Helps with hot flashes, night sweats, and sleep issues
- 👍 Easy to use and navigate
- 👍 Versatile for various use cases (Raynaud's, anxiety, etc.)
- 👍 Positive impact on quality of life

**What reviewers complain about**

- 🐛 Connectivity issues with app
- 🐛 Firmware/software compatibility problems
- 🔋 Battery life concerns
- 💡 Desire for more advanced features (Apple Watch integration, automatic mode, etc.)

**Reported bugs**

- Connectivity issues between device and app
- Firmware/software compatibility problems with newer devices
- Battery life draining faster than expected

**Requested features**

- Apple Watch integration
- Automatic mode/detection of hot flashes
- More customization options
- Improved app functionality and stability


### The90 Gem

[App page](https://appshunter.io/ios/app/the90-gem/id6758100822)

This jewelry-inspired sensor tracks your skin's real-time UV exposure. It helps you protect against aging and harness the sun's health benefits.

**Highlights:** Real-time UV tracking, Skin exposure monitoring, Aging protection, Sun health benefits, Jewelry-inspired design

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Embr Wave 2 free?

Embr Wave 2 is free to download, with no in-app purchases.

### Is The90 Gem free?

The90 Gem is free to download, with no in-app purchases.

### Which has better reviews, Embr Wave 2 or The90 Gem?

Embr Wave 2 is rated higher. Embr Wave 2 averages 4.8 out of 5 from 4K ratings, while The90 Gem averages 4.3 from 9 ratings.

### Do Embr Wave 2 or The90 Gem have ads?

Embr Wave 2 shows ads; The90 Gem does not.

### Which is updated more often, Embr Wave 2 or The90 Gem?

Embr Wave 2 ships an update every 2 months, and The90 Gem every 3 weeks. Most recently, Embr Wave 2 was updated on October 27, 2026 and The90 Gem on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*