# KeyLight PRO vs FilmMeter

The clearest difference is review sentiment: FilmMeter at 100% against KeyLight PRO's 44%. FilmMeter also leads on price (Free vs $0.99) and rating (5.0 vs 4.0). KeyLight PRO's advantage is in-app purchases (none vs 4) and iOS requirement (10.0 vs 17.0). On ads and device support there is nothing between them.

FilmMeter is free to download; KeyLight PRO costs $0.99 up front. FilmMeter sells 4 one-off in-app purchases. KeyLight PRO asks for nothing beyond the download.

FilmMeter holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: FilmMeter has 41 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 44% of KeyLight PRO's written reviews are positive against 100% of FilmMeter's.

KeyLight PRO ships an update every 26 months, FilmMeter every 2 days. The most recent releases landed on September 23, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | KeyLight PRO | FilmMeter |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/keylight-pro/id635455188/reviews) | **[5.0 (41 ratings)](https://appshunter.io/ios/app/filmmeter/id6753060069/reviews)** |
| Number of ratings | 4 | **41** |
| Positive reviews | 44.4% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 2 days** |
| Monetization | Paid | **Free** |
| Size | 3 MB | 143 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Brewer](https://appshunter.io/developer/635455211) | [宗 侯](https://appshunter.io/developer/1841159038) |

## What reviewers say

### KeyLight PRO

[App page](https://appshunter.io/ios/app/keylight-pro/id635455188)

This app simplifies off-camera flash photography by providing calculators for optimal exposure settings. It helps photographers determine ISO, aperture, strobe power, and distance, removing guesswork for both beginners and advanced users. Manage multiple lighting setups and modifiers with its virtual gear bag.

**Highlights:** Exposure calculators (ISO, aperture, strobe power, distance), Key Falloff calculator, Virtual Gear Bag for unlimited strobe configurations, Strobe Library with 100+ pre-loaded models, Support for various light modifiers, Save multiple setups

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### FilmMeter

[App page](https://appshunter.io/ios/app/filmmeter/id6753060069)

This app transforms your iPhone into a professional light meter for film photography. It offers real-time metering, LiDAR ranging for accurate focus, and comprehensive film roll management. Features include reciprocity calculation, ND filter compensation, and an exposure log to streamline your shooting workflow.

**Highlights:** Real-time light metering, LiDAR ranging and depth of field, Film roll and camera management, Reciprocity and ND filter compensation, Long exposure timer, Exposure logging

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy me a coffee | $0.99 | one-time |
| Buy me lunch | $2.99 | one-time |
| 请我吃块蛋糕 | $9.99 | one-time |
| 赞助开发 | $19.99 | one-time |


## Frequently asked questions

### Is KeyLight PRO free?

KeyLight PRO costs $0.99, with no in-app purchases.

### Is FilmMeter free?

FilmMeter is free to download, with in-app purchases available.

### Which has better reviews, KeyLight PRO or FilmMeter?

FilmMeter is rated higher. KeyLight PRO averages 4.0 out of 5 from 4 ratings, while FilmMeter averages 5.0 from 41 ratings.

### Do KeyLight PRO or FilmMeter have ads?

Neither KeyLight PRO nor FilmMeter shows ads.

### Which is updated more often, KeyLight PRO or FilmMeter?

KeyLight PRO ships an update every 26 months, and FilmMeter every 2 days. Most recently, KeyLight PRO was updated on September 23, 2026 and FilmMeter on September 27, 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.*