# FLICKERfree Calculator vs RED Tools

The clearest difference is rating: FLICKERfree Calculator at 4.7 against RED Tools's 3.3. FLICKERfree Calculator also leads on review sentiment (86% vs 50%) and update cadence (monthly vs every 21 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

FLICKERfree Calculator holds the better App Store score, 4.7 against 3.3. Both are backed by a comparable volume of ratings — 6 and 15 respectively. Written reviews point the same way: 86% of FLICKERfree Calculator's written reviews are positive against 50% of RED Tools's.

FLICKERfree Calculator ships an update monthly, RED Tools every 21 months. The most recent releases landed on October 14, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | FLICKERfree Calculator | RED Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (6 ratings)](https://appshunter.io/ios/app/flickerfree-calculator/id447247056/reviews)** | [3.3 (15 ratings)](https://appshunter.io/ios/app/red-tools/id894739141/reviews) |
| Number of ratings | 6 | **15** |
| Positive reviews | **85.7% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 21 months |
| Monetization | Free | Free |
| Size | 2 MB | 7 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Barton](https://appshunter.io/developer/447247059) | [RED Digital Cinema](https://appshunter.io/developer/632147766) |

## What reviewers say

### FLICKERfree Calculator

[App page](https://appshunter.io/ios/app/flickerfree-calculator/id447247056)

This tool helps cinematographers calculate precise camera speeds and shutter angles for flicker-free film or digital recording. It's particularly useful with HMI or fluorescent lighting, offering instant calculations for 50 Hz or 60 Hz frequencies.

**Highlights:** Calculate camera speed (fps), Calculate shutter angle (degrees), Selectable line frequency (50/60 Hz), Instant calculations, Finger slider for value selection, Includes reference card images

**Features:** macOS Compatibility

**In-app purchases:** none


### RED Tools

[App page](https://appshunter.io/ios/app/red-tools/id894739141)

This app assists filmmakers and camera operators with camera setup by providing tools for crop factor, recording time, flicker-free video, depth of field, panning speed, and exposure. It offers customizable settings for various shooting situations and RED camera systems.

**Highlights:** Crop factor preview, R3D recording time evaluation, Flicker-free video calculation, Depth of field estimation, Panning speed guidance, Exposure assistance

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FLICKERfree Calculator free?

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

### Is RED Tools free?

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

### Which has better reviews, FLICKERfree Calculator or RED Tools?

FLICKERfree Calculator is rated higher. FLICKERfree Calculator averages 4.7 out of 5 from 6 ratings, while RED Tools averages 3.3 from 15 ratings.

### Do FLICKERfree Calculator or RED Tools have ads?

Neither FLICKERfree Calculator nor RED Tools shows ads.

### Which is updated more often, FLICKERfree Calculator or RED Tools?

FLICKERfree Calculator ships an update monthly, and RED Tools every 21 months. Most recently, FLICKERfree Calculator was updated on October 14, 2026 and RED Tools on October 6, 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.*