# PSC vs SizeRight

The clearest difference is in-app purchases: SizeRight at none against PSC's 3. SizeRight also leads on device support (3 vs 1). PSC's advantage is update cadence (every 9 days vs every 3 weeks). On price, ads and iOS requirement there is nothing between them.

Both are free to download. PSC sells 3 in-app purchases, starting at $3.99 per month. SizeRight asks for nothing beyond the download.

PSC ships an update every 9 days, SizeRight every 3 weeks. The most recent releases landed on September 23, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | PSC | SizeRight |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Size | 92 MB | 26 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Vladyslav Boiko](https://appshunter.io/developer/1894025020) | [Alexander Bacsa](https://appshunter.io/developer/1895938685) |

## What reviewers say

### PSC

[App page](https://appshunter.io/ios/app/psc-position-size-calculator/id6762391592)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Monthly | $3.99 | per month |
| PRO Annual | $19.99 | per year |
| PRO Lifetime | $39.99 | one-time |


### SizeRight

[App page](https://appshunter.io/ios/app/sizeright-position-size/id6764857338)

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

**In-app purchases:** none


## Frequently asked questions

### Is PSC free?

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

### Is SizeRight free?

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

### Do PSC or SizeRight have ads?

Both PSC and SizeRight show ads.

### Which is updated more often, PSC or SizeRight?

PSC ships an update every 9 days, and SizeRight every 3 weeks. Most recently, PSC was updated on September 23, 2026 and SizeRight on September 20, 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.*