# RTctrl vs Video Size Calculator Pro

The clearest difference is in-app purchases: RTctrl at none against Video Size Calculator Pro's 1. RTctrl also leads on iOS requirement (11.0 vs 18.5). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Video Size Calculator Pro sells 1 one-off in-app purchase. RTctrl asks for nothing beyond the download.

RTctrl ships an update monthly, Video Size Calculator Pro every 3 weeks. The most recent releases landed on September 23, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | RTctrl | Video Size Calculator Pro |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 39 MB | 11 MB |
| Requires iOS | **11.0** | 18.5 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [HMO Europe B.V.](https://appshunter.io/developer/1247770241) | [Cederic Schmid](https://appshunter.io/developer/1833020611) |

## What reviewers say

### RTctrl

[App page](https://appshunter.io/ios/app/rtctrl-light-control/id1618410189)

**Features:** macOS Compatibility

**In-app purchases:** none


### Video Size Calculator Pro

[App page](https://appshunter.io/ios/app/video-size-calculator-pro/id6751235728)

Estimate video file sizes before recording or export. Calculate based on resolution, frame rate, codec, audio, and duration. Balance quality and storage needs with accurate, offline calculations.

**Highlights:** Video size calculation, Batch processing for multiple clips, Reverse calculation for target file size, Extensive resolution, FPS, and codec options, Offline functionality, Accessibility features

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Unlock | $4.99 | one-time |


## Frequently asked questions

### Is RTctrl free?

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

### Is Video Size Calculator Pro free?

Video Size Calculator Pro is free to download, with in-app purchases available.

### Do RTctrl or Video Size Calculator Pro have ads?

Neither RTctrl nor Video Size Calculator Pro shows ads.

### Which is updated more often, RTctrl or Video Size Calculator Pro?

RTctrl ships an update monthly, and Video Size Calculator Pro every 3 weeks. Most recently, RTctrl was updated on September 23, 2026 and Video Size Calculator Pro on September 25, 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.*