# Mars Hydro vs AppHush

The clearest difference is update cadence: AppHush at every 3 days against Mars Hydro's monthly. Mars Hydro's advantage is iOS requirement (15.0 vs 26.5). On price, ads, in-app purchases and device support there is nothing between them.

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

Mars Hydro ships an update monthly, AppHush every 3 days. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Mars Hydro | AppHush |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (27 ratings)](https://appshunter.io/ios/app/mars-hydro/id6479227564/reviews)** | — |
| Number of ratings | **27** | — |
| Positive reviews | 23.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | Free | — |
| Size | 45 MB | 12 MB |
| Requires iOS | **15.0** | 26.5 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [MARS TRADING RCC, INC.](https://appshunter.io/developer/1726858942) | [Moutaz Baaj](https://appshunter.io/developer/1797829279) |

## What reviewers say

### Mars Hydro

[App page](https://appshunter.io/ios/app/mars-hydro/id6479227564)

Control your smart grow system with this app. Manage LED lights, ventilation, and monitor environmental data like CO2, temperature, and humidity for optimal plant growth. Automate your entire grow kit to mimic natural conditions.

**Highlights:** LED light control with timers and simulation, Ventilation system management, Complete grow kit automation via iHub, Environmental data monitoring (CO2, temp, humidity, PPFD), Sunrise and sunset simulation

**In-app purchases:** none


### AppHush

[App page](https://appshunter.io/ios/app/apphush/id6806198142)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Mars Hydro free?

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

### Is AppHush free?

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

### Do Mars Hydro or AppHush have ads?

Neither Mars Hydro nor AppHush shows ads.

### Which is updated more often, Mars Hydro or AppHush?

Mars Hydro ships an update monthly, and AppHush every 3 days. Most recently, Mars Hydro was updated on October 13, 2026 and AppHush on October 8, 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.*