# Absolute Rest vs PISON

The clearest difference is rating: PISON at 5.0 against Absolute Rest's 3.7. On price, ratings volume, update cadence and ads there is nothing between them.

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

PISON holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 7 respectively.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 5, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Absolute Rest | PISON |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/absolute-rest/id6475053795/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/pison/id6475786964/reviews)** |
| Number of ratings | 3 | **7** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | Free |
| Size | 41 MB | 65 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Absolute Rest, Inc](https://appshunter.io/developer/1723237362) | [Pison Technology](https://appshunter.io/developer/1705268860) |

## What reviewers say

### Absolute Rest

[App page](https://appshunter.io/ios/app/absolute-rest/id6475053795)

This app provides a comprehensive sleep management program using an FDA-cleared testing system to analyze sleep patterns through the autonomic nervous system. It offers personalized insights and expert support to improve sleep quality and daytime performance.

**Highlights:** Comprehensive sleep assessment, Autonomic nervous system testing, Personalized insights and expert support, User-friendly app interface, Continuous monitoring of sleep parameters

**In-app purchases:** none


### PISON

[App page](https://appshunter.io/ios/app/pison/id6475786964)

This app provides insights into your cognitive and physical performance using data from compatible smartwatches. It helps you understand readiness, mental agility, and focus, with advanced metrics for sleep, stress, and health available through membership tiers.

**Highlights:** Cognitive performance metrics (Readiness, Agility, Focus), Sleep and fatigue tracking, Stress and health monitoring, Fitness metrics (respiratory rate, calories), Community leaderboards and groups, Insights from neural sensor technology

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

**In-app purchases:** none


## Frequently asked questions

### Is Absolute Rest free?

Absolute Rest is free to download, with no in-app purchases.

### Is PISON free?

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

### Which has better reviews, Absolute Rest or PISON?

PISON is rated higher. Absolute Rest averages 3.7 out of 5 from 3 ratings, while PISON averages 5.0 from 7 ratings.

### Do Absolute Rest or PISON have ads?

Neither Absolute Rest nor PISON shows ads.

### Which is updated more often, Absolute Rest or PISON?

Absolute Rest ships an update every 3 weeks, and PISON every 3 weeks. Most recently, Absolute Rest was updated on October 5, 2026 and PISON on October 9, 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.*