# PEER vs Calmness Meter

The clearest difference is in-app purchases: Calmness Meter at none against PEER's 10. Calmness Meter also leads on update cadence (every 3 days vs every 4 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. PEER sells 10 one-off in-app purchases. Calmness Meter asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for PEER against 5.0 for Calmness Meter. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

PEER ships an update every 4 months, Calmness Meter every 3 days. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | PEER | Calmness Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/peer/id1623717304/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/calmness-meter/id6476524297/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Free | Free |
| Size | 76 MB | 93 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BrainWave Software](https://appshunter.io/developer/1575971305) | [Evergreen Labs](https://appshunter.io/developer/1786660051) |

## What reviewers say

### PEER

[App page](https://appshunter.io/ios/app/peer/id1623717304)

This app facilitates EEG data recording and ERP analysis for research studies. It connects with specific EEG headsets to collect raw data and neurological study information. Recorded data can be exported for further analysis with various neuroscience tools.

**Highlights:** EEG recording and display, Event-Related Potential (ERP) analysis, Data export to Brain Vision Analyzer or .csv, Includes N-Back and Gambling Task games, Customizable image presenter, Searchable recordings with titles and notes

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| N-Back Trial | Free | one-time |
| Gambling Task/Doors Trial | Free | one-time |
| Audio Oddball Trial | Free | one-time |
| Image Presenter Trial | Free | one-time |
| Posner Trial | Free | one-time |
| Image Presenter | $499.00 | one-time |
| Posner | $499.00 | one-time |
| Gambling Task/Doors | $499.99 | one-time |
| N-Back | $499.99 | one-time |
| Audio Oddball | $499.99 | one-time |


### Calmness Meter

[App page](https://appshunter.io/ios/app/calmness-meter/id6476524297)

This app provides a real-time Calmness Score by analyzing brain signals from compatible EEG headbands. Track meditation effectiveness, adjust sessions mid-way, and receive gentle prompts to stay focused. It integrates with Apple Health for comprehensive analysis.

**Highlights:** Real-time Calmness Score, EEG headband integration, Meditation effectiveness tracking, Mid-session adjustments, Mind-wandering prompts, Apple Health integration

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

**In-app purchases:** none


## Frequently asked questions

### Is PEER free?

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

### Is Calmness Meter free?

Calmness Meter is free to download, with no in-app purchases.

### Which has better reviews, PEER or Calmness Meter?

PEER and Calmness Meter are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do PEER or Calmness Meter have ads?

Neither PEER nor Calmness Meter shows ads.

### Which is updated more often, PEER or Calmness Meter?

PEER ships an update every 4 months, and Calmness Meter every 3 days. Most recently, PEER was updated on November 3, 2026 and Calmness Meter on November 4, 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.*