# TM+ Pro vs Mars Hydro

The clearest difference is rating: TM+ Pro at 3.1 against Mars Hydro's 2.6. TM+ Pro also leads on review sentiment (32% vs 24%) and ratings volume (97 vs 27). On price, update cadence, 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.

TM+ Pro holds the better App Store score, 3.1 against 2.6. Both are backed by a comparable volume of ratings — 97 and 27 respectively. Written reviews point the same way: 32% of TM+ Pro's written reviews are positive against 24% of Mars Hydro's.

TM+ Pro ships an update every 2 months, Mars Hydro monthly. The most recent releases landed on October 9, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | TM+ Pro | Mars Hydro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (97 ratings)](https://appshunter.io/ios/app/tm-plus-pro/id1619222131/reviews)** | [2.6 (27 ratings)](https://appshunter.io/ios/app/mars-hydro/id6479227564/reviews) |
| Number of ratings | **97** | 27 |
| Positive reviews | **32.4% of reviews** | 23.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free | Free |
| Size | 124 MB | 45 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [TrolMaster Agro Instruments Co., Limited](https://appshunter.io/developer/1619222133) | [MARS TRADING RCC, INC.](https://appshunter.io/developer/1726858942) |

## What reviewers say

### TM+ Pro

[App page](https://appshunter.io/ios/app/tm-plus-pro/id1619222131)

Remotely monitor and control horticulture automation systems for your growth facilities. Features a new UI, historical charts, customizable device displays, and a logbook for tracking plant data. Connect with a community of growers and access support resources.

**Highlights:** Remote access to control systems, Historical data charting, Customizable device naming and photos, Plant growth logbook, Grower community and forum, Controller sharing with authorization

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is TM+ Pro free?

TM+ Pro is free to download, with no in-app purchases.

### Is Mars Hydro free?

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

### Which has better reviews, TM+ Pro or Mars Hydro?

TM+ Pro is rated higher. TM+ Pro averages 3.1 out of 5 from 97 ratings, while Mars Hydro averages 2.6 from 27 ratings.

### Do TM+ Pro or Mars Hydro have ads?

Neither TM+ Pro nor Mars Hydro shows ads.

### Which is updated more often, TM+ Pro or Mars Hydro?

TM+ Pro ships an update every 2 months, and Mars Hydro monthly. Most recently, TM+ Pro was updated on October 9, 2026 and Mars Hydro on October 13, 2026.

---

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