myLightMeter PRO vs UnionDocs
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
myLightMeter PRO
This app provides precise exposure measurement for photographers, offering both incident and reflected light metering. It allows full manual control over exposure settings and includes advanced tools like a hyperfocal-distance calculator and configurable presets. Readings can be organized into sessions and synced via iCloud.
- Incident and reflected-light metering
- Full manual exposure control
- Long exposure and low-light sensitivity
- Session organization and iCloud sync
- Hyperfocal-distance calculator
- Configurable presets
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Designed by a photographer, for photographers. Built for reliable, precise exposure measurement across film and digital workflows. myLightMeter PRO gives you full control over exposure through a clean, professional set of tools. Key Features • Incident and reflected-light metering • Classic and Pro interface styles • Full manual control over aperture, shutter speed, ISO, and exposure compensation in 1/3- or 1/2-stop increments • Exposure range from 4 hours in Long Exposure mode to 1/8000 s, f/1.0 to f/512, and ISO 0.8 to 409,600 • Aperture-priority (Av) and shutter-priority (Tv) modes • Automatic ISO adjustment or ISO lock • Reciprocity correction for long film exposures • Sensitivity down to −2.5 EV, ideal for low-light scenes • Average multiple readings • Import shutter speed, aperture, and ISO from photos in your library • Organize readings into Sessions with photos, exposure data, camera and lens details, and notes • Keep your Sessions synced through iCloud, so they remain available when you switch phones or use another device • Export Sessions as PDFs or print them Advanced Tools • Hyperfocal-distance calculator • Five configurable presets, each storing camera, lens, ISO, filter, and film settings • EV display with an analog scale or numerical reading • mySPOTMETER and f/Tools integration About This app is built and maintained by an independent photographer and developer. It is the tool I personally use and continuously refine. If you have suggestions or need support, contact me at: davidquiles@me.com
UnionDocs
Access experimental nonfiction programs, documentary screenings, and live events from a global community. Engage in discussions with artists and thinkers, and enjoy exclusive member benefits for IRL events.
- Stream curated documentary programs
- Access live events and screenings
- Listen to masterclasses and workshops
- Participate in study groups
- Get free admission to IRL events
- Connect with a global community
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Become a member and stay tuned into all things UnionDocs from anywhere around the world. We’re a curious community that asks what we can do and undo together through a set of exciting, experimental nonfiction programs. We’re always generating new ideas, and bringing folks together to deconstruct them. It’s a rich and vibrant space where storytelling, visual experimentation, journalism, politics, activism and poetry intersect. Peek in the window of our bustling three story building in NYC and tune into the ideas and energy bubbling up at UnionDocs. Stream cutting-edge, powerful and poetic documentary programs and connect to conversations with the artists and thinkers passing through. Link up with UnionDocs and a wide range of collaborators, from our closest neighbors to the most exciting festivals and cultural spaces around the world. 5 top reasons to join the UNDO community! Stream incredible stuff! Watch curated programs, UNDO productions, and live events from the comfort of your home. Listen and learn! Eavesdrop on our Labs & Workshops with masterclasses from the top voices in documentary. Participate in the debate! Attend monthly Study Groups that feature international artists & thinkers in a dynamic conversation. Swing by our spot! Get free admission to IRL events and discounts for your friends, with an annual membership. Meet fun, smart people! Find a community invested in urgent expressions of the human experience, practical perspectives on the world today, and compelling visions for the future. We operate with confidence in the idea that documentary art, when paired with thoughtful context and open debate, is an invaluable tool for understanding the complexities of contemporary life and creating a more just and equitable society. Show your support. Become a member, and start UN-DO-ING today! ----- https://uniondocs.org/terms-conditions/ https://uniondocs.org/privacy_policy/
Screenshots
Verdict
The clearest difference is price: UnionDocs at Free against myLightMeter PRO's $4.99. UnionDocs also leads on rating (5.0 vs 4.8) and device support (3 vs 1). myLightMeter PRO's advantage is update cadence (every 5 days vs every 2 months) and ratings volume (1.2K vs 1). On 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
UnionDocs is free to download; myLightMeter PRO costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
UnionDocs holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: myLightMeter PRO has 1.2K ratings behind it against 1, so its average is the more settled of the two.
myLightMeter PRO ships an update every 5 days, UnionDocs every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | myLightMeter PRO | UnionDocs |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 4.8 (1.2K ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 90.3% of reviews | — |
| Number of ratings | 1.2K — better | 1 |
| Update frequency | Every 5 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #25 — better | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 98 MB | 64 MB |
| Age rating | 4+ | 12+ |
| Developer | David Quiles | UnionDocs, INC |
Customer experience
myLightMeter PRO
UnionDocs
Bugs and requests
myLightMeter PRO
Reported bugs
3 issues- Crashes on startup
- Inconsistent behavior between free and pro versions
- Incorrect shutter speed and aperture options for some cameras
Requested features
4 requests- Ability to lock shutter speed and aperture
- Smaller spot metering area
- Support for more film/sensor formats
- Improved incident metering with diffuser
UnionDocs
Not enough reviews yet to summarise bugs or requests.
In-app purchases
myLightMeter PRO
No in-app purchases
UnionDocs
No in-app purchases
Questions
Is myLightMeter PRO free?
Is UnionDocs free?
Which has better reviews, myLightMeter PRO or UnionDocs?
Do myLightMeter PRO or UnionDocs have ads?
Which is updated more often, myLightMeter PRO or UnionDocs?
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