# C Interview Questions vs Pi

The clearest difference is in-app purchases: Pi at none against C Interview Questions's 1. Pi also leads on ads (none vs shown) and update cadence (every 2 months vs every 51 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. C Interview Questions sells 1 one-off in-app purchase. Pi asks for nothing beyond the download.

C Interview Questions ships an update every 51 months, Pi every 2 months. The most recent releases landed on October 12, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | C Interview Questions | Pi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 51 months | **Every 2 months** |
| Size | 16 MB | 206 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RAVINDHIRAN SUMITHRA](https://appshunter.io/developer/1571016391) | [Abdul Rafeeque Parakkal](https://appshunter.io/developer/1464562964) |

## 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 |


### Pi

[App page](https://appshunter.io/ios/app/pi-rates-learning/id6480366979)

**In-app purchases:** none


## Frequently asked questions

### Is C Interview Questions free?

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

### Is Pi free?

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

### Do C Interview Questions or Pi have ads?

C Interview Questions shows ads; Pi does not.

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

C Interview Questions ships an update every 51 months, and Pi every 2 months. Most recently, C Interview Questions was updated on October 12, 2026 and Pi on October 9, 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.*