# PISON vs Gridlines Training

The clearest difference is iOS requirement: PISON at 15.0 against Gridlines Training's 26.2. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 9, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | PISON | Gridlines Training |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/pison/id6475786964/reviews)** | — |
| Number of ratings | **7** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | — |
| Size | 65 MB | 31 MB |
| Requires iOS | **15.0** | 26.2 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Pison Technology](https://appshunter.io/developer/1705268860) | [Kyle Joseph Wilcox](https://appshunter.io/developer/6791792827) |

## What reviewers say

### 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


### Gridlines Training

[App page](https://appshunter.io/ios/app/gridlines-training/id6791792271)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PISON free?

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

### Is Gridlines Training free?

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

### Do PISON or Gridlines Training have ads?

Neither PISON nor Gridlines Training shows ads.

### Which is updated more often, PISON or Gridlines Training?

PISON ships an update every 3 weeks, and Gridlines Training every 3 weeks. Most recently, PISON was updated on October 9, 2026 and Gridlines Training on October 21, 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.*