# myLightMeter PRO vs UnionDocs

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.

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.

## The numbers

| Metric | myLightMeter PRO | UnionDocs |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.8 (1.2K ratings)](https://appshunter.io/ios/app/mylightmeter-pro/id583922375/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/uniondocs/id1630921215/reviews)** |
| Number of ratings | **1.2K** | 1 |
| Positive reviews | 90.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 2 months |
| Monetization | Paid | **Free** |
| Best chart rank | **#25** | — |
| Size | 98 MB | 64 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [David Quiles](https://appshunter.io/developer/578971109) | [UnionDocs, INC](https://appshunter.io/developer/1630921217) |

## What reviewers say

### myLightMeter PRO

[App page](https://appshunter.io/ios/app/mylightmeter-pro/id583922375)

**Currently charting:** #25 Top Paid · Photo & Video (US App Store)

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.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Accurate and reliable
- 👍 Convenient and easy to use
- 🔍 Useful for vintage/manual cameras
- 💡 Helpful for learning photography
- ⭐ Excellent value for money

**What reviewers complain about**

- 🐛 Crashes and bugs in recent versions
- 🔍 Spot metering mode not precise enough
- 🔧 Needs more customization options
- 🔋 Volume control issues

**Reported bugs**

- Crashes on startup
- Inconsistent behavior between free and pro versions
- Incorrect shutter speed and aperture options for some cameras

**Requested features**

- Ability to lock shutter speed and aperture
- Smaller spot metering area
- Support for more film/sensor formats
- Improved incident metering with diffuser


### UnionDocs

[App page](https://appshunter.io/ios/app/uniondocs/id1630921215)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is myLightMeter PRO free?

myLightMeter PRO costs $4.99, with no in-app purchases.

### Is UnionDocs free?

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

### Which has better reviews, myLightMeter PRO or UnionDocs?

UnionDocs is rated higher. myLightMeter PRO averages 4.8 out of 5 from 1.2K ratings, while UnionDocs averages 5.0 from 1 ratings.

### Do myLightMeter PRO or UnionDocs have ads?

Neither myLightMeter PRO nor UnionDocs shows ads.

### Which is updated more often, myLightMeter PRO or UnionDocs?

myLightMeter PRO ships an update every 5 days, and UnionDocs every 2 months. Most recently, myLightMeter PRO was updated on November 1, 2026 and UnionDocs on November 3, 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.*