# Connected Hydration vs PISON

The clearest difference is iOS requirement: PISON at 15.0 against Connected Hydration's 17.6. On price, rating, ratings volume and update cadence 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 Connected Hydration against 5.0 for PISON. Both are backed by a comparable volume of ratings — 8 and 7 respectively.

Connected Hydration ships an update monthly, PISON every 3 weeks. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Connected Hydration | PISON |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (8 ratings)](https://appshunter.io/ios/app/connected-hydration/id1621442254/reviews) | [5.0 (7 ratings)](https://appshunter.io/ios/app/pison/id6475786964/reviews) |
| Number of ratings | **8** | 7 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 41 MB | 65 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Epicore Biosystems, Inc](https://appshunter.io/developer/1449621320) | [Pison Technology](https://appshunter.io/developer/1705268860) |

## What reviewers say

### Connected Hydration

[App page](https://appshunter.io/ios/app/connected-hydration/id1621442254)

This app tracks fluid and electrolyte intake by working with a proprietary wearable sensor. It measures real-time sweat and electrolyte loss to provide comprehensive hydration data.

**Highlights:** Real-time sweat/electrolyte loss measurement, Fluid intake tracking, Electrolyte intake tracking, Works with proprietary wearable sensor, Hydration data analysis

**Features:** Vision Pro support

**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 Connected Hydration free?

Connected Hydration 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, Connected Hydration or PISON?

Connected Hydration and PISON are both rated 5.0 out of 5 on the App Store, from 8 and 7 ratings respectively.

### Do Connected Hydration or PISON have ads?

Neither Connected Hydration nor PISON shows ads.

### Which is updated more often, Connected Hydration or PISON?

Connected Hydration ships an update monthly, and PISON every 3 weeks. Most recently, Connected Hydration was updated on October 2, 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.*