# Kessil AP700 Controller vs HYDROS App

The clearest difference is review sentiment: HYDROS App at 62% against Kessil AP700 Controller's 15%. HYDROS App also leads on rating (3.7 vs 1.9) and update cadence (every 3 months vs every 9 months). Kessil AP700 Controller's advantage is iOS requirement (9.0 vs 15.6). On price, ratings volume, 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.

HYDROS App holds the better App Store score, 3.7 against 1.9. Both are backed by a comparable volume of ratings — 33 and 22 respectively. Written reviews point the same way: 15% of Kessil AP700 Controller's written reviews are positive against 62% of HYDROS App's.

Kessil AP700 Controller ships an update every 9 months, HYDROS App every 3 months. The most recent releases landed on October 7, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Kessil AP700 Controller | HYDROS App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.9 (33 ratings)](https://appshunter.io/ios/app/kessil-ap700-controller/id1097431839/reviews) | **[3.7 (22 ratings)](https://appshunter.io/ios/app/hydros-app/id1455344294/reviews)** |
| Number of ratings | **33** | 22 |
| Positive reviews | 15.0% of reviews | **62.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 50 MB | 70 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dicon Lighting](https://appshunter.io/developer/932272980) | [Coralvue](https://appshunter.io/developer/1455344293) |

## What reviewers say

### Kessil AP700 Controller

[App page](https://appshunter.io/ios/app/kessil-ap700-controller/id1097431839)

Control and program your aquarium lighting system with this app. Customize color, intensity, and create unique light schedules to simulate natural cycles. Features include hue control, custom color saving, and special effects for a personalized aquarium environment.

**Highlights:** Hue control for custom spectrums, Full color wheel and custom color saving, Create and preview light schedules, Flexible grouping and renaming, Coral Acclimation Mode, Moonlight and special effects

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Kessil AP700 Controller free?

Kessil AP700 Controller is free to download, with no in-app purchases.

### Is HYDROS App free?

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

### Which has better reviews, Kessil AP700 Controller or HYDROS App?

HYDROS App is rated higher. Kessil AP700 Controller averages 1.9 out of 5 from 33 ratings, while HYDROS App averages 3.7 from 22 ratings.

### Do Kessil AP700 Controller or HYDROS App have ads?

Neither Kessil AP700 Controller nor HYDROS App shows ads.

### Which is updated more often, Kessil AP700 Controller or HYDROS App?

Kessil AP700 Controller ships an update every 9 months, and HYDROS App every 3 months. Most recently, Kessil AP700 Controller was updated on October 7, 2026 and HYDROS App on October 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*