# Geca Watch by Hydrostasis vs Amicus INTERACT

The clearest difference is in-app purchases: Geca Watch by Hydrostasis at none against Amicus INTERACT's 10. Geca Watch by Hydrostasis also leads on iOS requirement (13.0 vs 15.1). Amicus INTERACT's advantage is update cadence (every 2 weeks vs every 5 weeks). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Amicus INTERACT sells 10 in-app purchases, starting at $18.95 per month. Geca Watch by Hydrostasis asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Geca Watch by Hydrostasis against 5.0 for Amicus INTERACT. Both are backed by a comparable volume of ratings — 3 and 3 respectively.

Geca Watch by Hydrostasis ships an update every 5 weeks, Amicus INTERACT every 2 weeks. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Geca Watch by Hydrostasis | Amicus INTERACT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/geca-watch-by-hydrostasis/id6476198463/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/amicus-interact/id6749228299/reviews) |
| Number of ratings | 3 | 3 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 62 MB | 60 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Hydrostasis Inc.](https://appshunter.io/developer/1466028949) | [Amicus Brain Innovations](https://appshunter.io/developer/1829403275) |

## What reviewers say

### Geca Watch by Hydrostasis

[App page](https://appshunter.io/ios/app/geca-watch-by-hydrostasis/id6476198463)

This app helps you monitor your hydration levels using a connected device that measures skin hydration. It provides real-time updates, personalized recommendations for water intake, and tracks your daily and weekly hydration trends to promote better health and wellness.

**Highlights:** Skin hydration measurement, Real-time updates, Personalized water intake recommendations, Daily and weekly hydration trend tracking, Habit building for optimal hydration

**Features:** macOS Compatibility

**In-app purchases:** none


### Amicus INTERACT

[App page](https://appshunter.io/ios/app/amicus-interact/id6749228299)

This AI-powered application supports older adults and individuals with dementia by facilitating communication and cognitive stimulation. It offers gentle conversation prompts and personalized assistance to help users stay connected, express themselves clearly, and maintain independence.

**Highlights:** Dementia-friendly design, Supports connection with loved ones, Gentle conversation support, Personalized assistance, Empowers independence, Encourages daily engagement

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Enhanced Monthly | $18.95 | per month |
| Elevated Monthly | $24.95 | per month |
| Flourish Monthly | $29.99 | per month |
| Empowered Monthly | $31.49 | per month |
| Flourish Monthly | $37.99 | per month |
| Essential Annual | $134.99 | per year |
| Enhanced Annual | $204.99 | per year |
| Elevated Annual | $269.99 | per year |
| Empowered Annual | $339.00 | per year |
| Flourish Annual | $404.99 | per year |


## Frequently asked questions

### Is Geca Watch by Hydrostasis free?

Geca Watch by Hydrostasis is free to download, with no in-app purchases.

### Is Amicus INTERACT free?

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

### Which has better reviews, Geca Watch by Hydrostasis or Amicus INTERACT?

Geca Watch by Hydrostasis and Amicus INTERACT are both rated 5.0 out of 5 on the App Store, from 3 and 3 ratings respectively.

### Do Geca Watch by Hydrostasis or Amicus INTERACT have ads?

Neither Geca Watch by Hydrostasis nor Amicus INTERACT shows ads.

### Which is updated more often, Geca Watch by Hydrostasis or Amicus INTERACT?

Geca Watch by Hydrostasis ships an update every 5 weeks, and Amicus INTERACT every 2 weeks. Most recently, Geca Watch by Hydrostasis was updated on November 4, 2026 and Amicus INTERACT on October 30, 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.*