# hey abby vs Mars Hydro

The clearest difference is rating: hey abby at 3.4 against Mars Hydro's 2.6. hey abby also leads on review sentiment (36% vs 24%) and ratings volume (107 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.

hey abby holds the better App Store score, 3.4 against 2.6. Both are backed by a comparable volume of ratings — 107 and 27 respectively. Written reviews point the same way: 36% of hey abby's written reviews are positive against 24% of Mars Hydro's.

hey abby ships an update every 3 weeks, Mars Hydro monthly. The most recent releases landed on July 4, 2026 and August 11, 2026 respectively.

## The numbers

| Metric | hey abby | Mars Hydro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (107 ratings)](https://appshunter.io/ios/app/hey-abby/id1594778711/reviews)** | [2.6 (27 ratings)](https://appshunter.io/ios/app/mars-hydro/id6479227564/reviews) |
| Number of ratings | **107** | 27 |
| Positive reviews | **35.7% of reviews** | 23.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free | Free |
| Size | 90 MB | 45 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [CL Design Studio LLC](https://appshunter.io/developer/1594778713) | [MARS TRADING RCC, INC.](https://appshunter.io/developer/1726858942) |

## What reviewers say

### hey abby

[App page](https://appshunter.io/ios/app/hey-abby/id1594778711)

This app guides users through plant cultivation from seed to harvest with step-by-step video instructions. It offers tools to track plant progress, maintain detailed grow diaries with data charts, and manage climate settings.

**Highlights:** Step-by-step video grow instructions, Plant progress tracking, Detailed grow diaries, Climate management tools, Grow community access

**Features:** macOS Compatibility

**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 hey abby free?

hey abby 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, hey abby or Mars Hydro?

hey abby is rated higher. hey abby averages 3.4 out of 5 from 107 ratings, while Mars Hydro averages 2.6 from 27 ratings.

### Do hey abby or Mars Hydro have ads?

Neither hey abby nor Mars Hydro shows ads.

### Which is updated more often, hey abby or Mars Hydro?

hey abby ships an update every 3 weeks, and Mars Hydro monthly. Most recently, hey abby was updated on July 4, 2026 and Mars Hydro on August 11, 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.*