Comparison

Elemind vs The90 Gem

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Elemind

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
Read full description

Elemind is pioneering neurotechnology for sleep that reads and instantly responds to your individual brainwaves and works naturally to direct your brain out of wakeful patterns into a deeper sleep, on-demand. Our patented algorithm tracks your EEG brain signals and delivers precise acoustic stimulation tailored to your brain’s natural rhythms - so you fall asleep significantly faster. Like noise cancellation for the brain, you can switch off the world and switch off the stress and go to sleep faster because with Elemind you actively drive your brain from an awake state to a sleep state. Elemind is clinically shown to improve sleep efficiency. It is designed to help you fall asleep as fast as the leading sleep drugs, without the negative side effects or next day grogginess. Which means that when you wake up, you’ll feel at your best and ready for whatever the day brings. The Elemind app is designed to pair with our EEG-based headband, which houses multiple sensors designed to accurately track your sleep. However, different from other sleep trackers, the Elemind headband analyzes your brain activity in real time to deliver precisely timed acoustic stimulation via a bone conduction speaker that has clinically been shown to get you to sleep faster. The app features: DETAILED SLEEP MONITORING Sleep isn’t a score to chase—it’s a rhythm to understand. Elemind skips oversimplified metrics and delivers data-driven insights that support healthier, more natural sleep—so you can wake up feeling truly restored. The Elemind app provides raw and derived metrics in clear visual formats like hypnograms and bar charts, paired with context that helps you interpret them. You’ll see how long you were in each sleep stage, how efficiently you slept, and how your sleep changes over time—all without being reduced to a grade. Elemind is a general wellness product, not a medical device. It is not intended to diagnose, treat, cure, prevent, or manage any disease or medical condition. Elemind is designed to support and encourage a healthy lifestyle and is intended for general wellness use only. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

The90 Gem

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
Read full description

The jewelry-inspired UV sensor that tracks what your skin actually experiences, so you can protect how you age while harnessing the health benefits of the sun.

Screenshots

Elemind4 screens
The90 Gem4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Elemind ships an update every 10 days, The90 Gem every 2 weeks. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.

Scorecard4 real differences · 6 level
Elemind versus The90 Gem: the parameters behind the verdict, then further details
ParameterElemindThe90 Gem
PriceFreeFree
Rating2.3 (7 ratings)4.3 (7 ratings) — better
Positive reviews44.0% of reviews80.0% of reviews — better
Number of ratings77
Update frequencyEvery 10 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size71 MB96 MB
Age rating12+4+
DeveloperElemind Technologies, Inc.The90, Inc.

Customer experience

Elemind

All ratings7 ratings
Positive28.6%
Neutral0.0%
Negative71.4%
Written reviews25 reviews
Positive44.0%
Neutral0.0%
Negative56.0%

The90 Gem

Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

In-app purchases

2 purchases

Elemind

Subscriptions2
  • Elemind Monthly1 Month trial$12.991 Month
  • Elemind Annual1 Month trial$83.991 Year
None

The90 Gem

No in-app purchases

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 12, 2026 and The90 Gem on October 5, 2026.

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