# Interview Prep vs Callback

The clearest difference is update cadence: Callback at every 4 days against Interview Prep's fortnightly. Interview Prep's advantage is iOS requirement (16.4 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Interview Prep sells 2 in-app purchases, starting at $6.99 per 7 days and Callback sells 3 in-app purchases, starting at $16.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Interview Prep ships an update fortnightly, Callback every 4 days. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Interview Prep | Callback |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Size | 64 MB | 50 MB |
| Requires iOS | **16.4** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Marco Santonocito](https://appshunter.io/developer/940445653) | [Nocte Ventures Ltd](https://appshunter.io/developer/1824906600) |

## What reviewers say

### Interview Prep

[App page](https://appshunter.io/ios/app/interview-prep-finance-career/id6784305234)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Altair Weekly | $6.99 | per 7 days |
| Altair Yearly | $59.99 | per year |


### Callback

[App page](https://appshunter.io/ios/app/callback-finance-interviews/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 Interview Prep free?

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

### Is Callback free?

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

### Do Interview Prep or Callback have ads?

Neither Interview Prep nor Callback shows ads.

### Which is updated more often, Interview Prep or Callback?

Interview Prep ships an update fortnightly, and Callback every 4 days. Most recently, Interview Prep was updated on October 28, 2026 and Callback on October 29, 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.*