# Stop Calculator vs Flicker Safe

The clearest difference is price: Flicker Safe at Free against Stop Calculator's $0.99. Stop Calculator's advantage is in-app purchases (none vs 1) and update cadence (every 2 days vs every 3 weeks). On ads there is nothing between them.

Flicker Safe is free to download; Stop Calculator costs $0.99 up front. Flicker Safe sells 1 one-off in-app purchase. Stop Calculator asks for nothing beyond the download.

Stop Calculator ships an update every 2 days, Flicker Safe every 3 weeks. The most recent releases landed on October 10, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Stop Calculator | Flicker Safe |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/stop-calculator/id6720706774/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 weeks |
| Monetization | Paid | — |
| Size | 1 MB | 2 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [eric Hernandez](https://appshunter.io/developer/875120891) | [Jan Sokol](https://appshunter.io/developer/1896490456) |

## What reviewers say

### Stop Calculator

[App page](https://appshunter.io/ios/app/stop-calculator/id6720706774)

This tool helps filmmakers quickly compare exposure settings between two cameras. It calculates precise stop differences in real-time, ensuring your shots are perfectly exposed and matched across different setups. Simplify your workflow and eliminate guesswork.

**Highlights:** Compare ISO, t-stop, shutter angle, and FPS, Real-time stop difference calculation, Intuitive interface for filmmakers, Exposure feedback for underexposed/overexposed shots

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

**In-app purchases:** none


### Flicker Safe

[App page](https://appshunter.io/ios/app/flicker-safe-test-light/id6771406035)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FlickerSafe Pro | $6.99 | one-time |


## Frequently asked questions

### Is Stop Calculator free?

Stop Calculator costs $0.99, with no in-app purchases.

### Is Flicker Safe free?

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

### Do Stop Calculator or Flicker Safe have ads?

Neither Stop Calculator nor Flicker Safe shows ads.

### Which is updated more often, Stop Calculator or Flicker Safe?

Stop Calculator ships an update every 2 days, and Flicker Safe every 3 weeks. Most recently, Stop Calculator was updated on October 10, 2026 and Flicker Safe on September 30, 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.*