# illumeter vs SLR Assist

The clearest difference is rating: illumeter at 4.6 against SLR Assist's 1.0. illumeter also leads on in-app purchases (none vs 2) and ratings volume (12 vs 1). SLR Assist's advantage is device support (3 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. SLR Assist sells 2 in-app purchases, starting at $0.99 per month. illumeter asks for nothing beyond the download.

illumeter holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: illumeter has 12 ratings behind it against 1, so its average is the more settled of the two.

illumeter ships an update every 2 weeks, SLR Assist every 3 weeks. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | illumeter | SLR Assist |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (12 ratings)](https://appshunter.io/ios/app/illumeter/id6474086258/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/slr-assist-light-meter/id6478798272/reviews) |
| Number of ratings | **12** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | **Free** | Freemium |
| Size | 12 MB | 7 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Seunghun Yang](https://appshunter.io/developer/1586944242) | [Vsevolod Kemaev](https://appshunter.io/developer/1733952138) |

## What reviewers say

### illumeter

[App page](https://appshunter.io/ios/app/illumeter/id6474086258)

This app functions as a portable light meter, allowing users to measure exposure values like aperture, shutter speed, and ISO. It offers features for logging shots with location and settings, and provides customization options for a personalized user experience.

**Highlights:** Exposure measurement (Aperture, Shutter Speed, ISO), Tap-to-focus exposure lock, Exposure compensation, Frame logging with location and settings, List and map view of logged frames, Customizable settings and appearance

**Features:** macOS Compatibility

**In-app purchases:** none


### SLR Assist

[App page](https://appshunter.io/ios/app/slr-assist-light-meter/id6478798272)

This app helps film photographers achieve perfect exposure with its intuitive light metering tools. It offers various shooting modes, real-time readings, and helpful tips for both beginners and enthusiasts. Unlock advanced features with a paid plan, including a free trial.

**Highlights:** Exposure measurement for film photography, Shutter priority mode, Program mode, Aperture priority mode, Real-time exposure readings, Expired film mode, Exposure compensation

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Annual | $9.99 | per year |


## Frequently asked questions

### Is illumeter free?

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

### Is SLR Assist free?

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

### Which has better reviews, illumeter or SLR Assist?

illumeter is rated higher. illumeter averages 4.6 out of 5 from 12 ratings, while SLR Assist averages 1.0 from 1 ratings.

### Do illumeter or SLR Assist have ads?

Neither illumeter nor SLR Assist shows ads.

### Which is updated more often, illumeter or SLR Assist?

illumeter ships an update every 2 weeks, and SLR Assist every 3 weeks. Most recently, illumeter was updated on October 24, 2026 and SLR Assist on October 8, 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.*