# Mars Hydro vs Grove's Expense Manager

The clearest difference is ads: Mars Hydro at none against Grove's Expense Manager's shown. Mars Hydro also leads on iOS requirement (15.0 vs 17.0). Grove's Expense Manager's advantage is update cadence (every 11 days vs monthly). On price, 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, Grove's Expense Manager every 11 days. The most recent releases landed on August 11, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Mars Hydro | Grove's Expense Manager |
| --- | --- | --- |
| 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** | Yes |
| Update frequency | Monthly | **Every 11 days** |
| Monetization | Free | — |
| Size | 45 MB | 21 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [MARS TRADING RCC, INC.](https://appshunter.io/developer/1726858942) | [Grove OU](https://appshunter.io/developer/1819044273) |

## 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


### Grove's Expense Manager

[App page](https://appshunter.io/ios/app/groves-expense-manager/id6771747585)

**Features:** macOS Compatibility, Family Sharing, 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 Grove's Expense Manager free?

Grove's Expense Manager is free to download, with no in-app purchases.

### Do Mars Hydro or Grove's Expense Manager have ads?

Grove's Expense Manager shows ads; Mars Hydro does not.

### Which is updated more often, Mars Hydro or Grove's Expense Manager?

Mars Hydro ships an update monthly, and Grove's Expense Manager every 11 days. Most recently, Mars Hydro was updated on August 11, 2026 and Grove's Expense Manager on September 30, 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.*