# IIT CA EndUser vs PRRO STS

The clearest difference is review sentiment: PRRO STS at 50% against IIT CA EndUser's 42%. IIT CA EndUser's advantage is iOS requirement (12.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

IIT CA EndUser ships an update every 7 months, PRRO STS every 3 months. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | IIT CA EndUser | PRRO STS |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 41.7% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 40 MB | 212 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IIT, JSC](https://appshunter.io/developer/1447134477) | [The State Tax Service of Ukraine](https://appshunter.io/developer/1634048992) |

## What reviewers say

### IIT CA EndUser

[App page](https://appshunter.io/ios/app/iit-ca-enduser/id1447134478)

This application allows users to manage private keys and certificates for digital signatures. It enables the creation and verification of signatures to ensure data protection and authenticity.

**Highlights:** Private key management, Certificate control, Signature creation, Signature verification, Data protection

**Features:** macOS Compatibility

**In-app purchases:** none


### PRRO STS

[App page](https://appshunter.io/ios/app/prro-sts/id1634048990)

This application provides a simple and convenient tool for businesses to manage sales and services. It allows for the creation and registration of fiscal receipts, easy item management, and sending receipts to customers. The app supports various payment methods and offers features for discounts, returns, and shift management.

**Highlights:** Create and register fiscal receipts, Add products and services to receipts, Send receipts via email or messengers, Manage shift openings and closings, Use barcode scanner, Process various payment types, Apply discounts and process returns

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IIT CA EndUser free?

IIT CA EndUser is free to download, with no in-app purchases.

### Is PRRO STS free?

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

### Do IIT CA EndUser or PRRO STS have ads?

Neither IIT CA EndUser nor PRRO STS shows ads.

### Which is updated more often, IIT CA EndUser or PRRO STS?

IIT CA EndUser ships an update every 7 months, and PRRO STS every 3 months. Most recently, IIT CA EndUser was updated on October 18, 2026 and PRRO STS on October 24, 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.*