# Mars Legacy vs GrowDiary

The clearest difference is ads: Mars Legacy at none against GrowDiary's shown. Mars Legacy also leads on iOS requirement (13.0 vs 16.4). GrowDiary's advantage is update cadence (every 9 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 Legacy ships an update monthly, GrowDiary every 9 days. The most recent releases landed on October 14, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Mars Legacy | GrowDiary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.3 (70 ratings)](https://appshunter.io/ios/app/mars-legacy/id1612237275/reviews)** | — |
| Number of ratings | **70** | — |
| Positive reviews | 12.2% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | Free | — |
| Size | 59 MB | 46 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [MARS TRADING RCC, INC.](https://appshunter.io/developer/1726858942) | [GrowD soft s.r.o.](https://appshunter.io/developer/1784239247) |

## What reviewers say

### Mars Legacy

[App page](https://appshunter.io/ios/app/mars-legacy/id1612237275)

Control and configure your indoor grow lights remotely. Automate growth cycles with custom timers, simulate sunrise and sunset, and manage multiple lights independently from a single device. Compatible with the Mars Hydro Smart Grow System.

**Highlights:** Remote LED light control, Adjustable light intensity, Automatic growth cycle programming, Sunrise/sunset simulation, Wireless multi-light control, Independent lighting group management

**In-app purchases:** none

**What reviewers like**

- ✅ Fan control works reliably
- ⚙️ Basic on/off functionality operational
- 🎯 Good hardware quality (lights and fans)
- 💰 Reasonable price-to-quality ratio
- 📱 App concept is innovative

**What reviewers complain about**

- 🐛 Frequent disconnections (WiFi and Bluetooth)
- ⏱️ Timer functionality completely broken
- 🌅 Sunrise/sunset mode non-functional
- 🎬 Scene/automation features unreliable
- 🔄 App randomly resets or crashes

**Reported bugs**

- App cannot detect Bluetooth despite phone detecting it
- Timer settings do not execute at scheduled times
- Scenes and automation groups fail to work
- WiFi connection drops frequently and reconnection fails
- Light brightness changes unexpectedly without user input

**Requested features**

- Multiple on/off cycles per day for automation
- Daylight saving time adjustment option
- Sunrise/sunset mode with adjustable brightness levels
- Better WiFi stability and range
- Improved app interface and user experience


### GrowDiary

[App page](https://appshunter.io/ios/app/growdiary/id6739211123)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mars Legacy free?

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

### Is GrowDiary free?

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

### Do Mars Legacy or GrowDiary have ads?

GrowDiary shows ads; Mars Legacy does not.

### Which is updated more often, Mars Legacy or GrowDiary?

Mars Legacy ships an update monthly, and GrowDiary every 9 days. Most recently, Mars Legacy was updated on October 14, 2026 and GrowDiary on October 2, 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.*