# HYDROS App vs TWINSTAR LightControl

The clearest difference is review sentiment: HYDROS App at 64% against TWINSTAR LightControl's 15%. HYDROS App also leads on rating (4.1 vs 1.9). TWINSTAR LightControl's advantage is update cadence (fortnightly vs every 3 months). 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, 4.1 against 1.9. Both are backed by a comparable volume of ratings — 17 and 15 respectively. Written reviews point the same way: 64% of HYDROS App's written reviews are positive against 15% of TWINSTAR LightControl's.

HYDROS App ships an update every 3 months, TWINSTAR LightControl fortnightly. The most recent releases landed on September 16, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | HYDROS App | TWINSTAR LightControl |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (17 ratings)](https://appshunter.io/ios/app/hydros-app/id1455344294/reviews)** | [1.9 (15 ratings)](https://appshunter.io/ios/app/twinstar-lightcontrol/id6743735243/reviews) |
| Number of ratings | **17** | 15 |
| Positive reviews | **63.5% of reviews** | 15.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 69 MB | 140 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CV Industries LLC](https://appshunter.io/developer/1455344293) | [Twinstar Inc](https://appshunter.io/developer/1804257047) |

## 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

**In-app purchases:** none


### TWINSTAR LightControl

[App page](https://appshunter.io/ios/app/twinstar-lightcontrol/id6743735243)

Control your TWINSTAR LED lights with this app. Adjust Red, Green, Blue, and Plant Growing LEDs, and set custom timers for sunrise and sunset effects. Requires Bluetooth and TWINSTAR LED Dimmer hardware.

**Highlights:** Control LED lights, Adjust RGB and Plant Growing LEDs, Set timers, Sunrise and sunset effects, Intuitive interface

**In-app purchases:** none


## Frequently asked questions

### Is HYDROS App free?

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

### Is TWINSTAR LightControl free?

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

### Which has better reviews, HYDROS App or TWINSTAR LightControl?

HYDROS App is rated higher. HYDROS App averages 4.1 out of 5 from 17 ratings, while TWINSTAR LightControl averages 1.9 from 15 ratings.

### Do HYDROS App or TWINSTAR LightControl have ads?

Neither HYDROS App nor TWINSTAR LightControl shows ads.

### Which is updated more often, HYDROS App or TWINSTAR LightControl?

HYDROS App ships an update every 3 months, and TWINSTAR LightControl fortnightly. Most recently, HYDROS App was updated on September 16, 2026 and TWINSTAR LightControl on September 23, 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.*