# C Interview Questions vs Vastlabs App

The clearest difference is update cadence: Vastlabs App at fortnightly against C Interview Questions's every 51 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. C Interview Questions sells 1 one-off in-app purchase and Vastlabs App sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

C Interview Questions ships an update every 51 months, Vastlabs App fortnightly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | C Interview Questions | Vastlabs App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 51 months | **Fortnightly** |
| Size | 16 MB | 37 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RAVINDHIRAN SUMITHRA](https://appshunter.io/developer/1571016391) | [George Raphael](https://appshunter.io/developer/1453288135) |

## What reviewers say

### C Interview Questions

[App page](https://appshunter.io/ios/app/c-interview-questions/id1070985063)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| C Interview Questions Adfree | $3.99 | one-time |


### Vastlabs App

[App page](https://appshunter.io/ios/app/vastlabs-app/id1662007120)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| C Programming | $34.99 | one-time |
| HTML - Beginners Guide | $34.99 | one-time |
| CSS- Beginner's Guide | $69.99 | one-time |
| PHP - Beginners Guide | $89.99 | one-time |
| MySQL - Beginners Guide | $99.99 | one-time |
| Javascript - Beginners Guide | $99.99 | one-time |
| Beginner's Guide To Laravel | $149.99 | one-time |
| Mobile Application Development | $229.99 | one-time |


## Frequently asked questions

### Is C Interview Questions free?

C Interview Questions is free to download, with in-app purchases available.

### Is Vastlabs App free?

Vastlabs App is free to download, with in-app purchases available.

### Do C Interview Questions or Vastlabs App have ads?

Both C Interview Questions and Vastlabs App show ads.

### Which is updated more often, C Interview Questions or Vastlabs App?

C Interview Questions ships an update every 51 months, and Vastlabs App fortnightly. Most recently, C Interview Questions was updated on November 2, 2026 and Vastlabs App on November 3, 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.*