# PSA Calculator vs UMC Research App

The clearest difference is update cadence: PSA Calculator at every 4 days against UMC Research App's every 3 months. PSA Calculator also leads on iOS requirement (7.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

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

PSA Calculator ships an update every 4 days, UMC Research App every 3 months. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | PSA Calculator | UMC Research App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 months |
| Size | 11 MB | 93 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [ASolutions bv](https://appshunter.io/developer/592688597) | [Your Research B.V.](https://appshunter.io/developer/1504669925) |

## What reviewers say

### PSA Calculator

[App page](https://appshunter.io/ios/app/psa-calculator/id1112886138)

**Features:** macOS Compatibility

**In-app purchases:** none


### UMC Research App

[App page](https://appshunter.io/ios/app/umc-research-app/id1617831213)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PSA Calculator free?

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

### Is UMC Research App free?

UMC Research App is free to download, with no in-app purchases.

### Do PSA Calculator or UMC Research App have ads?

Neither PSA Calculator nor UMC Research App shows ads.

### Which is updated more often, PSA Calculator or UMC Research App?

PSA Calculator ships an update every 4 days, and UMC Research App every 3 months. Most recently, PSA Calculator was updated on November 6, 2026 and UMC Research App on November 7, 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.*