# Mars Hydro vs NthGrow

The clearest difference is rating: Mars Hydro at 2.6 against NthGrow's 2.4. Mars Hydro also leads on ratings volume (27 vs 8). NthGrow's advantage is update cadence (fortnightly vs monthly) and review sentiment (33% vs 24%). 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.

Mars Hydro holds the better App Store score, 2.6 against 2.4. Both are backed by a comparable volume of ratings — 27 and 8 respectively. Written reviews complicate that: 24% of Mars Hydro's written reviews are positive against 33% of NthGrow's, so the app with the better star average is not the one people write more warmly about.

Mars Hydro ships an update monthly, NthGrow fortnightly. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Mars Hydro | NthGrow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (27 ratings)](https://appshunter.io/ios/app/mars-hydro/id6479227564/reviews)** | [2.4 (8 ratings)](https://appshunter.io/ios/app/nthgrow/id6479299040/reviews) |
| Number of ratings | **27** | 8 |
| Positive reviews | 23.8% of reviews | **33.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free | Free |
| Size | 45 MB | 46 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [MARS TRADING RCC, INC.](https://appshunter.io/developer/1726858942) | [Shenzhen Lazelaze Ecological Agriculture Technology Co., Ltd.](https://appshunter.io/developer/1595529331) |

## 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


### NthGrow

[App page](https://appshunter.io/ios/app/nthgrow/id6479299040)

Control and configure your NthGrow devices remotely. This utility app allows for easy management of settings and device operations.

**Highlights:** Device configuration, Remote control, Settings management, Effortless operation

**In-app purchases:** none


## Frequently asked questions

### Is Mars Hydro free?

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

### Is NthGrow free?

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

### Which has better reviews, Mars Hydro or NthGrow?

Mars Hydro is rated higher. Mars Hydro averages 2.6 out of 5 from 27 ratings, while NthGrow averages 2.4 from 8 ratings.

### Do Mars Hydro or NthGrow have ads?

Neither Mars Hydro nor NthGrow shows ads.

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

Mars Hydro ships an update monthly, and NthGrow fortnightly. Most recently, Mars Hydro was updated on October 13, 2026 and NthGrow on October 4, 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.*