# School Pay vs CST Exam Prep

The clearest difference is in-app purchases: School Pay at none against CST Exam Prep's 5. School Pay also leads on ads (none vs shown). CST Exam Prep's advantage is update cadence (every 5 days vs monthly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. CST Exam Prep sells 5 in-app purchases, starting at $5.99 per 7 days. School Pay asks for nothing beyond the download.

School Pay ships an update monthly, CST Exam Prep every 5 days. The most recent releases landed on October 11, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | School Pay | CST Exam Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 5 days** |
| Size | 36 MB | 47 MB |
| Requires iOS | **14.0.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OPERATION TECHNOLOGY FOR FINANCIAL FACILITIES COMPANY E-FINANCE](https://appshunter.io/developer/1729209254) | [Ilia Chernikov](https://appshunter.io/developer/1818071113) |

## What reviewers say

### School Pay

[App page](https://appshunter.io/ios/app/school-pay/id6670402594)

**Features:** macOS Compatibility

**In-app purchases:** none


### CST Exam Prep

[App page](https://appshunter.io/ios/app/cst-exam-prep/id6755035712)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $5.99 | per 7 days |
| Month | $9.99 | per month |
| 3 Month | $19.99 | per 3 months |
| 1 Month | $29.99 | per month |
| 3 Month | $59.99 | per 3 months |


## Frequently asked questions

### Is School Pay free?

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

### Is CST Exam Prep free?

CST Exam Prep is free to download, with in-app purchases available.

### Do School Pay or CST Exam Prep have ads?

CST Exam Prep shows ads; School Pay does not.

### Which is updated more often, School Pay or CST Exam Prep?

School Pay ships an update monthly, and CST Exam Prep every 5 days. Most recently, School Pay was updated on October 11, 2026 and CST Exam Prep on October 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*