# Elemind vs The90 Gem

The clearest difference is rating: The90 Gem at 4.3 against Elemind's 2.3. The90 Gem also leads on review sentiment (80% vs 44%) and in-app purchases (none vs 2). Elemind's advantage is iOS requirement (13.0 vs 15.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Elemind sells 2 in-app purchases, starting at $12.99 per month. The90 Gem asks for nothing beyond the download.

The90 Gem holds the better App Store score, 4.3 against 2.3. Both are backed by a comparable volume of ratings — 7 and 7 respectively. Written reviews point the same way: 44% of Elemind's written reviews are positive against 80% of The90 Gem's.

Elemind ships an update every 10 days, The90 Gem every 2 weeks. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Elemind | The90 Gem |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (7 ratings)](https://appshunter.io/ios/app/elemind/id6502909319/reviews) | **[4.3 (7 ratings)](https://appshunter.io/ios/app/the90-gem/id6758100822/reviews)** |
| Number of ratings | 7 | 7 |
| Positive reviews | 44.0% of reviews | **80.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 weeks |
| Monetization | Free | Free |
| Size | 71 MB | 96 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Elemind Technologies, Inc.](https://appshunter.io/developer/1524781150) | [The90, Inc.](https://appshunter.io/developer/1870863367) |

## What reviewers say

### Elemind

[App page](https://appshunter.io/ios/app/elemind/id6502909319)

This app uses neurotechnology to read and respond to your brainwaves, guiding you into deeper sleep. It analyzes EEG signals to deliver precise acoustic stimulation, helping you fall asleep faster and improve sleep efficiency without negative side effects.

**Highlights:** Real-time EEG brainwave tracking, Personalized acoustic stimulation, Faster sleep onset, Improved sleep efficiency, Detailed sleep stage analysis, Data-driven sleep insights

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Elemind Monthly | $12.99 | per month |
| Elemind Annual | $83.99 | per year |


### 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 Elemind free?

Elemind is free to download, with in-app purchases available.

### Is The90 Gem free?

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

### Which has better reviews, Elemind or The90 Gem?

The90 Gem is rated higher. Elemind averages 2.3 out of 5 from 7 ratings, while The90 Gem averages 4.3 from 7 ratings.

### Do Elemind or The90 Gem have ads?

Neither Elemind nor The90 Gem shows ads.

### Which is updated more often, Elemind or The90 Gem?

Elemind ships an update every 10 days, and The90 Gem every 2 weeks. Most recently, Elemind was updated on October 16, 2026 and The90 Gem on October 5, 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.*