# illumeter vs FFF

The clearest difference is update cadence: FFF at weekly against illumeter's every 2 weeks. FFF also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

illumeter ships an update every 2 weeks, FFF weekly. The most recent releases landed on July 18, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | illumeter | FFF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (11 ratings)](https://appshunter.io/ios/app/illumeter/id6474086258/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 12 MB | 88 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Seunghun Yang](https://appshunter.io/developer/1586944242) | [Gi Seong Lee](https://appshunter.io/developer/1588552428) |

## 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


### FFF

[App page](https://appshunter.io/ios/app/fff-f-for-fun/id6502235765)

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

**In-app purchases:** none


## Frequently asked questions

### Is illumeter free?

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

### Is FFF free?

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

### Do illumeter or FFF have ads?

Neither illumeter nor FFF shows ads.

### Which is updated more often, illumeter or FFF?

illumeter ships an update every 2 weeks, and FFF weekly. Most recently, illumeter was updated on July 18, 2026 and FFF on September 16, 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.*