# CST Exam Prep & Practice Test vs Teachback AI

The clearest difference is device support: CST Exam Prep & Practice Test at 3 against Teachback AI's 1. CST Exam Prep & Practice Test also leads on iOS requirement (13.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. CST Exam Prep & Practice Test sells 1 one-off in-app purchase and Teachback AI sells 3 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | CST Exam Prep & Practice Test | Teachback AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 4 months |
| Size | 73 MB | 35 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nova Scotia Limited](https://appshunter.io/developer/1757830011) | [Mahmoud Barazi](https://appshunter.io/developer/1886927977) |

## What reviewers say

### CST Exam Prep & Practice Test

[App page](https://appshunter.io/ios/app/cst-exam-prep-and-practice-test/id6754791705)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $9.99 | one-time |


### Teachback AI

[App page](https://appshunter.io/ios/app/teachback-ai/id6760937065)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Teachback AI Pro | $7.99 | per 7 days |
| Teachback AI Pro | $9.99 | per month |
| Teachback AI Pro | $59.99 | per year |


## Frequently asked questions

### Is CST Exam Prep & Practice Test free?

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

### Is Teachback AI free?

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

### Do CST Exam Prep & Practice Test or Teachback AI have ads?

Neither CST Exam Prep & Practice Test nor Teachback AI shows ads.

---

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