# Mars Legacy vs PPFD METER

The clearest difference is rating: PPFD METER at 4.6 against Mars Legacy's 1.3. PPFD METER also leads on review sentiment (53% vs 12%). Mars Legacy's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price, ratings volume, update cadence and device support there is nothing between them.

Both are free to download. PPFD METER sells 3 in-app purchases, starting at $1.99 per month. Mars Legacy asks for nothing beyond the download.

PPFD METER holds the better App Store score, 4.6 against 1.3. Both are backed by a comparable volume of ratings — 70 and 118 respectively. Written reviews point the same way: 12% of Mars Legacy's written reviews are positive against 53% of PPFD METER's.

Mars Legacy ships an update monthly, PPFD METER every 3 weeks. The most recent releases landed on August 7, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Mars Legacy | PPFD METER |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.3 (70 ratings)](https://appshunter.io/ios/app/mars-legacy/id1612237275/reviews) | **[4.6 (118 ratings)](https://appshunter.io/ios/app/ppfd-meter-grow-light-meter/id6479329051/reviews)** |
| Number of ratings | 70 | **118** |
| Positive reviews | 12.2% of reviews | **52.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 59 MB | 43 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MARS TRADING RCC, INC.](https://appshunter.io/developer/1726858942) | [Candas Pamukcu](https://appshunter.io/developer/1735587895) |

## 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


### PPFD METER

[App page](https://appshunter.io/ios/app/ppfd-meter-grow-light-meter/id6479329051)

This app measures light intensity for plants, converting LUX to PPFD and DLI. It offers advanced light mapping, uniformity analysis, and efficiency insights to optimize plant growth. Customize profiles for different environments and growth stages.

**Highlights:** LUX, PPFD, DLI, and PAR measurements, Light mapping and distribution analysis, Uniformity and PPF evaluation, Energy efficiency and consumption tracking, Customizable setting profiles, Bluetooth sensor integration

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $1.99 | per month |
| Premium Plus | $2.99 | per month |
| Remove Ads | $29.99 | one-time |


## Frequently asked questions

### Is Mars Legacy free?

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

### Is PPFD METER free?

PPFD METER is free to download, with in-app purchases available.

### Which has better reviews, Mars Legacy or PPFD METER?

PPFD METER is rated higher. Mars Legacy averages 1.3 out of 5 from 70 ratings, while PPFD METER averages 4.6 from 118 ratings.

### Do Mars Legacy or PPFD METER have ads?

PPFD METER shows ads; Mars Legacy does not.

### Which is updated more often, Mars Legacy or PPFD METER?

Mars Legacy ships an update monthly, and PPFD METER every 3 weeks. Most recently, Mars Legacy was updated on August 7, 2026 and PPFD METER on September 26, 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.*