# PISON vs FlexLft

The clearest difference is update cadence: PISON at every 3 weeks against FlexLft's every 2 months. PISON also leads on ratings volume (7 vs 2) and iOS requirement (15.0 vs 17.6). On price, rating, 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.

On the App Store both sit at effectively the same score — 5.0 for PISON against 5.0 for FlexLft. Both are backed by a comparable volume of ratings — 7 and 2 respectively.

PISON ships an update every 3 weeks, FlexLft every 2 months. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | PISON | FlexLft |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (7 ratings)](https://appshunter.io/ios/app/pison/id6475786964/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/flexlft/id6753325612/reviews) |
| Number of ratings | **7** | 2 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 65 MB | 6 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Pison Technology](https://appshunter.io/developer/1705268860) | [Joshua Colvin](https://appshunter.io/developer/1843515001) |

## 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


### FlexLft

[App page](https://appshunter.io/ios/app/flexlft/id6753325612)

Create and track custom weight training programs with this app. It offers smart progression suggestions, a built-in rest timer, and syncs with Apple Health. Your data stays private and on your device.

**Highlights:** Custom program builder, Smart weight progression, Built-in rest timer, Apple Health integration, Workout history tracking, Offline functionality

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PISON free?

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

### Is FlexLft free?

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

### Which has better reviews, PISON or FlexLft?

PISON and FlexLft are both rated 5.0 out of 5 on the App Store, from 7 and 2 ratings respectively.

### Do PISON or FlexLft have ads?

Neither PISON nor FlexLft shows ads.

### Which is updated more often, PISON or FlexLft?

PISON ships an update every 3 weeks, and FlexLft every 2 months. Most recently, PISON was updated on October 9, 2026 and FlexLft on October 7, 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.*