# Kessler kOS vs pCAM Pro

The clearest difference is review sentiment: pCAM Pro at 97% against Kessler kOS's 0%. pCAM Pro also leads on rating (4.9 vs 3.0) and update cadence (every 8 days vs every 3 months). Kessler kOS's advantage is price (Free vs $34.99) and in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

Kessler kOS is free to download; pCAM Pro costs $34.99 up front. pCAM Pro sells 3 one-off in-app purchases. Kessler kOS asks for nothing beyond the download.

pCAM Pro holds the better App Store score, 4.9 against 3.0. That said, the two scores are not equally well evidenced: pCAM Pro has 221 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of Kessler kOS's written reviews are positive against 97% of pCAM Pro's.

Kessler kOS ships an update every 3 months, pCAM Pro every 8 days. The most recent releases landed on July 18, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Kessler kOS | pCAM Pro |
| --- | --- | --- |
| Price | **Free** | $34.99 |
| Rating | [3.0 (3 ratings)](https://appshunter.io/ios/app/kessler-kos/id1128523711/reviews) | **[4.9 (221 ratings)](https://appshunter.io/ios/app/pcam-pro-camera-tools/id1308057201/reviews)** |
| Number of ratings | 3 | **221** |
| Positive reviews | 0.0% of reviews | **97.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 8 days** |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#130** |
| Size | 38 MB | 42 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Kessler Crane Inc.](https://appshunter.io/developer/529307950) | [David Eubank](https://appshunter.io/developer/1645606643) |

## What reviewers say

### 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


### pCAM Pro

[App page](https://appshunter.io/ios/app/pcam-pro-camera-tools/id1308057201)

**Currently charting:** #130 Top Paid · Photo & Video (US App Store)

This app provides 27 essential tools for cinematography and photography professionals and students. It offers instant calculations for depth of field, field of view, exposure, and more, with a user-friendly interface designed for on-the-go use.

**Highlights:** Depth of Field calculations, Field of View preview, Focal Length matching, Exposure calculations, HMI Flicker-free settings, Speed Booster adapter calculations, VFX tracking markers

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $1.99 | one-time |
| Medium Tip | $4.99 | one-time |
| Large Tip | $7.99 | one-time |

**What reviewers like**

- 👍 Indispensable tool for cinematographers
- 👍 Great calculators and converters
- 👍 Very easy to use and intuitive
- 👍 Clear, accurate, and concise
- 👍 Useful for pre-visualization

**What reviewers complain about**

- 🐛 Does not access iPhone camera for POV simulation
- 🐛 Cartoon cutouts for actors are not realistic
- 🐛 Hyperfocal 'apply' button placement on iPad is accidental
- 🐛 Users had to repurchase the app for updates

**Reported bugs**

- None explicitly mentioned, but feature requests imply areas for improvement.

**Requested features**

- Access iPhone camera for exact POV simulation
- Implement a night mode
- Relocate hyperfocal 'apply' button in Depth-of-Field calculator


## Frequently asked questions

### Is Kessler kOS free?

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

### Is pCAM Pro free?

pCAM Pro costs $34.99, and also offers in-app purchases.

### Which has better reviews, Kessler kOS or pCAM Pro?

pCAM Pro is rated higher. Kessler kOS averages 3.0 out of 5 from 3 ratings, while pCAM Pro averages 4.9 from 221 ratings.

### Do Kessler kOS or pCAM Pro have ads?

Neither Kessler kOS nor pCAM Pro shows ads.

### Which is updated more often, Kessler kOS or pCAM Pro?

Kessler kOS ships an update every 3 months, and pCAM Pro every 8 days. Most recently, Kessler kOS was updated on July 18, 2026 and pCAM Pro on September 29, 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.*