Lumu Light Meter vs Lightme
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lumu Light Meter
This app functions as a standalone reflective light meter or pairs with hardware for professional flash and color temperature measurements. It offers various modes for photography and videography, storing measurements with notes and location.
- Standalone reflective light meter
- Flash and color temperature metering
- Photo and cine/video modes
- Spot metering
- Color temperature in Kelvin
- Store measurements with notes
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The light metering tool for every great image maker. Use the standalone app as a reflective light meter or use it in combination with Lumu Power hardware for professional Flash and Color Temperature measurements. Lumu Power is an easy-to-use digital incident color and light meter that works seamlessly with the free Lumu app to deliver Color Temperature, Illuminance, Spot, Ambient, and Flash Exposure metering functionality on your iPhone. A new expression of what a light meter can be, Lumu meets the needs of enthusiasts, professionals, and students who find existing light metering solutions too bulky, expensive, and complicated. “The Lumu Power is without any doubt the most full featured light meter I have ever owned. It’s tiny, it weighs hardly anything, it manages to offer a feature set that expands way beyond what most will ever need from such a device.” - www.35mmc.com Key features: - SPOT METERING: Use your phone’s camera as a reflective light meter. With Lumu Power: - PHOTO SINGLE mode: Giving you exact parameters: exposure time, f-number, ISO, EV, lux. - PHOTO MULTI mode: Calculating average value or contrast between multiple measurements. - PHOTO PINHOLE mode: Measuring exposure time for custom pinhole camera settings. - CINE/VIDEO mode: Set FPS, F-number, exposure time and ISO. Get the values for the ambiental light. - FLASH EXPOSURE: See the graph of flash duration, measure its intensity. - COLOR TEMPERATURE: Read light Color temperature in Kelvin and Green/Magenta shift. - CHROMATICITY: See light colour in CIE1931 diagram and get X,Y,Z coordinates. - ILLUMINANCE mode: showing incident light level in lux / foot-candle values. - NOTES: Store all your measurements together with geo-location, custom notes and your photo in one place. + ND FILTERS, EXPOSURE COMPENSATION and more… Visit http://lu.mu/ to learn more.
Lightme
This app helps analog photographers meticulously track their film rolls, shots, and development processes. It allows for detailed logging of gear and consumables, with features for data visualization and export. Users can also manage film holders and add post-development notes with photos of final results.
- Log film rolls, shots, and development
- Track gear and consumables
- Data visualization with graphs/histograms
- Data export in JSON/CSV formats
- Manage large format film holders
- Post-development notes with photos
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Lightme - Logbook is a clean and powerful tool to record and keep track of your rolls, shots, developments, and all the gear that revolves around shooting film — from 35mm to medium and large format. The idea behind it is simple: logging a shot should take seconds, not steal time from actually shooting. Lightme pairs a beautiful, immediate interface with enough depth and flexibility to fit any workflow, whether you shoot a couple of rolls a year or fill several large format holders in an afternoon. LOGGING, EFFORTLESSLY • Log a shot in seconds: aperture, shutter speed, focal length, filters, bellows correction, measured EV, notes and more • Log straight from your wrist with the companion Apple Watch app, with Siri and Shortcuts, or from the home screen and lock screen widgets • Together with the Lightme Lightmeter app, your meter readings can prefill a new shot automatically • Every shot can carry a location and address, a preview photo, and later its final scan, plus a star rating ROLLS, SHEETS AND DEVELOPMENTS • Track rolls from loading to unloading, with film stocks from a growing database and a processing pipeline: waiting for development, off to the lab, back from the lab, to be scanned, scanned • Keep detailed development notes — developer, dilution, time, temperature, agitation — for rolls and single sheets alike, including push/pull (N+ / N-) development • Add post-development notes and a photo of the final result to rolls, sheets and individual shots YOUR GEAR, ORGANIZED • Cameras and lenses with nicknames, formats (including custom formats you define), pinhole and bellows flags, custom shutter speeds and selectable shutter step sizes • Roll film backs and lens filters with their exposure compensation • Film holders and backs can be marked as compatible with specific cameras, and everything is searchable from a single bar LARGE FORMAT, COVERED • Keep track of your film holders with three states — unloaded, loaded and exposed — always knowing which film is inside each one • Group holders together and follow every sheet from exposure through development INSIGHTS FROM YOUR DATA • Build and save custom queries, filtering by date (fixed or rolling windows), camera, lens, film stock, format, ISO, aperture, shutter speed, focal length and notes • Visualize results with histograms — by camera, lens, film stock, shutter speed, aperture, focal length, ISO, format, rating or hour of the day — alongside aggregate stats like mean aperture and average exposure • Save the queries you use most and re-run them anytime YOUR DATA, YOURS • Everything syncs privately through iCloud across your iPhone and iPad • Export any selection of data as CSV or JSON, or as a beautifully formatted PDF with customizable columns and a contact-sheet mode, bundled with your images in a single ZIP • Batch-write shooting metadata (EXIF) onto your scans — for a whole roll at once, or by matching files from the Files app • Viewing and exporting your data is free, forever; adding and editing is unlocked with a one-time purchase or a subscription AND MORE • Full-text search, favourites and an archive to keep things tidy • Available in English, Italian, Spanish, Japanese and Simplified Chinese • A roadmap of what's coming next lives right in the app — new very cool features are on the way :) If you have any suggestion or issue, write me at lightme.apps@gmail.com Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: Lightme at 4.8 against Lumu Light Meter's 3.4. Lightme also leads on review sentiment (74% vs 53%) and update cadence (every 9 days vs monthly). Lumu Light Meter's advantage is iOS requirement (12.0 vs 17.0). On price, ratings volume, ads and 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
Both are free to download. Lumu Light Meter sells 3 one-off in-app purchases and Lightme sells 8 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Lightme holds the better App Store score, 4.8 against 3.4. Both are backed by a comparable volume of ratings — 99 and 101 respectively. Written reviews point the same way: 53% of Lumu Light Meter's written reviews are positive against 74% of Lightme's.
Lumu Light Meter ships an update monthly, Lightme every 9 days. The most recent releases landed on September 19, 2026 and September 23, 2026 respectively.
| Parameter | Lumu Light Meter | Lightme |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (99 ratings) | 4.8 (101 ratings) — better |
| Positive reviews | 52.8% of reviews | 73.9% of reviews — better |
| Number of ratings | 99 | 101 — better |
| Update frequency | Monthly | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 52 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Lumu d.o.o. | Giuseppe Bertolini |
Customer experience
Lumu Light Meter
Lightme
Bugs and requests
Lumu Light Meter
Reported bugs
14 issues- 🐛 LUX value shown as FootCandle
- 🐛 ISO keeps changing when metering
- 🐛 Color temp readout option disappeared
- 🐛 Error when factory resetting module
- 🐛 Cannot read CCT
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- 🐛 App no longer recognizes original Lumu
- 🐛 Photo Ambient mode turns off
- 🐛 Device not recognized after app update
- 🐛 High-pitched squeal on app open
- 🐛 Loud painful high frequency noise with earphones
- 🐛 Saved files not found
- 🐛 App not working with older iPhones
- 🐛 Exposure compensation backwards
- 🐛 Extremely high pitched squeal
Requested features
11 requests- 💡 Aperture priority mode
- 💡 Ability to lock aperture
- 💡 Analog style shutter speed/aperture display
- 💡 Option to see all equivalent exposure settings at a glance
- 💡 Ability to take two readings and see difference in stops
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- 💡 Use phone's volume button to take reading
- 💡 Add lower ISO options (below 50)
- 💡 Half-stop increments for ISO/aperture
- 💡 Video mode
- 💡 Location tracking for readings
- 💡 Sync only on Wi-Fi setting
Lightme
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Lumu Light Meter
- Lite to Power Upgrade$69.99
- Power to Pro Upgrade$229.99
- Lite to Pro Upgrade$249.99
Lightme
- 1 Cappuccino7 Days trial$2.991 Month
- Focaccia Barese7 Days trial$12.991 Year
- Spaghetti Carbonara7 Days trial$29.991 Year
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- Homemade Pizza party7 Days trial$49.991 Year
- A smile :)Free
- Box of Prosecco$59.99
- Fuel for my '90s camper$119.99
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- Terme for two$239.99
Questions
Is Lumu Light Meter free?
Is Lightme free?
Which has better reviews, Lumu Light Meter or Lightme?
Do Lumu Light Meter or Lightme have ads?
Which is updated more often, Lumu Light Meter or Lightme?
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