Plant Light Meter vs Luminosys
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Plant Light Meter
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.
- Measure natural and artificial light
- Interpret light levels for plant health
- Compatible with rear camera
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After excessive watering, lack of light is the second most common cause of death of indoor plants. Better light conditions will keep your plants healthy. Measure your plants’ ideal light levels for the price of a cup of coffee! How to use: - Launch the application - Point the camera toward the plant’s leaves - Press the “Measure” button How to interpret the measurement: - Very low light: Difficult conditions for plants to survive. - Low light: For plants that can tolerate low levels of light, such as the aglaonema, parlor palm, and philodendron. - Medium light: For the majority of indoor plants, such as the Dracaena, Pothos, and spider plant. - High light: For plants that love light, such as the zebra plant, areca palm, and croton. Features: - Detection of natural light & artificial lights - Compatible with rear camera only Notes: This application allows you to measure the light levels of indoor plants. However, if you need very precise measurements, the use of professional equipment is recommended.
Luminosys
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.
- 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
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Luminosys allows you to accurately measure the ambient light level in Lux or Foot Candles (FC). To do this, Luminosys uses your phone's camera in conjunction with a piece of paper to accurately measure the light level. It is very easy to use and is a great app for those looking for accurate light measurements for photography, comparing light sources, or indoor gardening.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Plant Light Meter | Luminosys |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.6 (1.1K ratings) — better | 4.3 (10 ratings) |
| Positive reviews | 38.7% of reviews | 75.0% of reviews — better |
| Number of ratings | 1.1K — better | 10 |
| Update frequency | Fortnightly — better | Every 19 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 217 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Studio Nano Ship, Inc. | Melissa Zwick |
Customer experience
Plant Light Meter
Luminosys
Bugs and requests
Plant Light Meter
Reported bugs
4 issues- Fails to access camera
- Inconsistent light readings
- Completely inaccurate measurements
- Stopped working after update
Requested features
5 requests- Add more plant varieties
- Allow use of front-facing camera
- Provide numerical light readings
- Add watering information
- Improve compatibility with latest devices
Luminosys
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Plant Light Meter
No in-app purchases
Luminosys
No in-app purchases
Questions
Is Plant Light Meter free?
Is Luminosys free?
Which has better reviews, Plant Light Meter or Luminosys?
Do Plant Light Meter or Luminosys have ads?
Which is updated more often, Plant Light Meter or Luminosys?
Other comparisons
