# Plant Light Meter vs Luminosys

The clearest difference is price: Luminosys at Free against Plant Light Meter's $2.99. Luminosys also leads on review sentiment (75% vs 39%). Plant Light Meter's advantage is ads (none vs shown) and update cadence (fortnightly vs every 19 months). On in-app purchases there is nothing between them.

Luminosys is free to download; Plant Light Meter costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Plant Light Meter holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Plant Light Meter has 1.1K ratings behind it against 10, so its average is the more settled of the two. Written reviews complicate that: 39% of Plant Light Meter's written reviews are positive against 75% of Luminosys's, so the app with the better star average is not the one people write more warmly about.

Plant Light Meter ships an update fortnightly, Luminosys every 19 months. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Plant Light Meter | Luminosys |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.6 (1.1K ratings)](https://appshunter.io/ios/app/plant-light-meter/id1213431133/reviews)** | [4.3 (10 ratings)](https://appshunter.io/ios/app/luminosys-light-meter/id6476405389/reviews) |
| Number of ratings | **1.1K** | 10 |
| Positive reviews | 38.7% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 19 months |
| Monetization | **Free** | Ad-supported |
| Size | 217 MB | 3 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Studio Nano Ship, Inc.](https://appshunter.io/developer/818733631) | [Melissa Zwick](https://appshunter.io/developer/1616726350) |

## What reviewers say

### Plant Light Meter

[App page](https://appshunter.io/ios/app/plant-light-meter/id1213431133)

This app helps indoor plant owners assess the light conditions their plants are receiving. By using your phone's camera, you can measure light levels and understand if they are optimal for your specific plant's needs, preventing common issues like lack of light.

**Highlights:** Measure natural and artificial light, Interpret light levels for plant health, Compatible with rear camera

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Accurate and helpful
- 💡 Useful for newbie plant owners
- 💡 Saves time and guesswork
- 🚀 Quick and easy measurements

**What reviewers complain about**

- 🐛 Limited plant database
- 🐛 Inaccurate readings
- 🐛 Measures leaf color, not light
- 🐛 Broken after recent update
- 🐛 Doesn't work on newer devices

**Reported bugs**

- Fails to access camera
- Inconsistent light readings
- Completely inaccurate measurements
- Stopped working after update

**Requested features**

- Add more plant varieties
- Allow use of front-facing camera
- Provide numerical light readings
- Add watering information
- Improve compatibility with latest devices


### Luminosys

[App page](https://appshunter.io/ios/app/luminosys-light-meter/id6476405389)

Accurately measure ambient light levels in Lux or Foot Candles using your phone's camera. This tool is ideal for photography, comparing light sources, or indoor gardening. It's designed for ease of use and provides precise readings.

**Highlights:** Measures light in Lux, Measures light in Foot Candles (FC), Uses phone camera for accuracy, Easy to use interface, Suitable for photography, Useful for indoor gardening

**In-app purchases:** none


## Frequently asked questions

### Is Plant Light Meter free?

Plant Light Meter costs $2.99, with no in-app purchases.

### Is Luminosys free?

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

### Which has better reviews, Plant Light Meter or Luminosys?

Plant Light Meter is rated higher. Plant Light Meter averages 4.6 out of 5 from 1.1K ratings, while Luminosys averages 4.3 from 10 ratings.

### Do Plant Light Meter or Luminosys have ads?

Luminosys shows ads; Plant Light Meter does not.

### Which is updated more often, Plant Light Meter or Luminosys?

Plant Light Meter ships an update fortnightly, and Luminosys every 19 months. Most recently, Plant Light Meter was updated on November 2, 2026 and Luminosys on November 4, 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.*