# RED Tools vs Kessler kOS

The clearest difference is review sentiment: RED Tools at 50% against Kessler kOS's 0%. RED Tools also leads on rating (3.3 vs 3.0) and ratings volume (15 vs 3). Kessler kOS's advantage is update cadence (every 3 months vs every 21 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

RED Tools holds the better App Store score, 3.3 against 3.0. That said, the two scores are not equally well evidenced: RED Tools has 15 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 50% of RED Tools's written reviews are positive against 0% of Kessler kOS's.

RED Tools ships an update every 21 months, Kessler kOS every 3 months. The most recent releases landed on September 19, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | RED Tools | Kessler kOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (15 ratings)](https://appshunter.io/ios/app/red-tools/id894739141/reviews)** | [3.0 (3 ratings)](https://appshunter.io/ios/app/kessler-kos/id1128523711/reviews) |
| Number of ratings | **15** | 3 |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 7 MB | 38 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [RED Digital Cinema](https://appshunter.io/developer/632147766) | [Kessler Crane Inc.](https://appshunter.io/developer/529307950) |

## What reviewers say

### 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


### Kessler kOS

[App page](https://appshunter.io/ios/app/kessler-kos/id1128523711)

This advanced software provides precise wireless control for professional camera motion systems. It enables users to create complex, repeatable camera movements for various video and photography applications through an intuitive interface.

**Highlights:** Ultra-refined keyframe control, Wireless iPad control, Timelapse and stop motion modes, Complex keyframe movement, Editable keyframes, Repeatable camera moves, Event mode for live scenarios

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

**In-app purchases:** none


## Frequently asked questions

### Is RED Tools free?

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

### Is Kessler kOS free?

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

### Which has better reviews, RED Tools or Kessler kOS?

RED Tools is rated higher. RED Tools averages 3.3 out of 5 from 15 ratings, while Kessler kOS averages 3.0 from 3 ratings.

### Do RED Tools or Kessler kOS have ads?

Neither RED Tools nor Kessler kOS shows ads.

### Which is updated more often, RED Tools or Kessler kOS?

RED Tools ships an update every 21 months, and Kessler kOS every 3 months. Most recently, RED Tools was updated on September 19, 2026 and Kessler kOS on September 26, 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.*