# HYDROS App vs Cufflink

The clearest difference is rating: Cufflink at 5.0 against HYDROS App's 3.7. Cufflink also leads on update cadence (every 3 weeks vs every 3 months). HYDROS App's advantage is ratings volume (22 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Cufflink holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: HYDROS App has 22 ratings behind it against 2, so its average is the more settled of the two.

HYDROS App ships an update every 3 months, Cufflink every 3 weeks. The most recent releases landed on October 9, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | HYDROS App | Cufflink |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (22 ratings)](https://appshunter.io/ios/app/hydros-app/id1455344294/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cufflink/id1671035016/reviews)** |
| Number of ratings | **22** | 2 |
| Positive reviews | 62.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 70 MB | 47 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Coralvue](https://appshunter.io/developer/1455344293) | [Mountain Vector Energy, LLC](https://appshunter.io/developer/1579929341) |

## What reviewers say

### HYDROS App

[App page](https://appshunter.io/ios/app/hydros-app/id1455344294)

Easily monitor and control your aquarium's vital parameters like temperature, pH, and salinity. Manage all your connected devices, including ATOs, lights, and pumps, with a user-friendly interface. Quick setup with preset configurations means no coding is required to get your system running.

**Highlights:** Monitor temperature, ORP, pH, salinity, Control ATO, lights, heaters, pumps, User-friendly interface, Quick setup with presets, Manage multiple devices and aquariums, Set schedules and create modes

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

**In-app purchases:** none


### Cufflink

[App page](https://appshunter.io/ios/app/cufflink/id1671035016)

Monitor and manage your cufflink devices with this mobile application. View real-time readings, receive alerts, and locate devices on a map. Pin important devices for quick access on the home screen.

**Highlights:** View cufflink device readings, Pin/unpin devices, Search for facilities and devices, Map device locations, Real-time alerts

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

**In-app purchases:** none


## Frequently asked questions

### Is HYDROS App free?

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

### Is Cufflink free?

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

### Which has better reviews, HYDROS App or Cufflink?

Cufflink is rated higher. HYDROS App averages 3.7 out of 5 from 22 ratings, while Cufflink averages 5.0 from 2 ratings.

### Do HYDROS App or Cufflink have ads?

Neither HYDROS App nor Cufflink shows ads.

### Which is updated more often, HYDROS App or Cufflink?

HYDROS App ships an update every 3 months, and Cufflink every 3 weeks. Most recently, HYDROS App was updated on October 9, 2026 and Cufflink on October 5, 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.*