# Cambridge® C1 Tests 2026 vs Callback AI

The clearest difference is iOS requirement: Cambridge® C1 Tests 2026 at 16.0 against Callback AI's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Cambridge® C1 Tests 2026 sells 3 one-off in-app purchases and Callback AI sells 3 in-app purchases, starting at $16.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Cambridge® C1 Tests 2026 | Callback AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/cambridge-c1-tests-2026/id6777397796/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Daily |
| Monetization | Free | — |
| Size | 78 MB | 13 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Diego Marco](https://appshunter.io/developer/1882099369) | [Nocte Ventures Ltd](https://appshunter.io/developer/1824906600) |

## What reviewers say

### Cambridge® C1 Tests 2026

[App page](https://appshunter.io/ios/app/cambridge-c1-tests-2026/id6777397796)

Prepare for the Cambridge C1 Advanced exam with hundreds of practice questions covering Reading, Use of English, and Listening. Get detailed explanations for every answer to master grammar, vocabulary, and comprehension skills. Track your progress through authentic exam formats.

**Highlights:** Hundreds of practice questions, Authentic exam format, Detailed answer explanations, Reading, Use of English, Listening practice, Progress tracking, No ads or tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Pro | $4.99 | one-time |
| 3 Months Pro | $7.99 | one-time |
| 6 Months Pro | $9.99 | one-time |


### Callback AI

[App page](https://appshunter.io/ios/app/callback-ai/id6800513662)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Callback Pro Weekly | $16.99 | per 7 days |
| Callback Pro (Monthly) | $34.99 | per month |
| Callback Pro (Quarterly) | $79.99 | per 3 months |


## Frequently asked questions

### Is Cambridge® C1 Tests 2026 free?

Cambridge® C1 Tests 2026 is free to download, with in-app purchases available.

### Is Callback AI free?

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

### Do Cambridge® C1 Tests 2026 or Callback AI have ads?

Neither Cambridge® C1 Tests 2026 nor Callback AI shows ads.

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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.*