# DevPrep vs Delta IS Mobile

The clearest difference is in-app purchases: Delta IS Mobile at none against DevPrep's 1. Delta IS Mobile also leads on iOS requirement (13.0 vs 17.0). DevPrep's advantage is device support. On price there is nothing between them.

Both are free to download. DevPrep sells 1 in-app purchase, starting at $2.99 per 6 months. Delta IS Mobile asks for nothing beyond the download.

## The numbers

| Metric | DevPrep | Delta IS Mobile |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Every 9 days | — |
| Size | 28 MB | 23 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | **iPhone, iPad, iPod, Mac** | — |
| Age rating | 4+ | 4+ |
| Developer | [Aliaksei Yelin](https://appshunter.io/developer/1502827500) | [Oleg Marchenko](https://appshunter.io/developer/1618908200) |

## What reviewers say

### DevPrep

[App page](https://appshunter.io/ios/app/devprep-coding-interview/id1527624816)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get full access | $2.99 | per 6 months |


### Delta IS Mobile

[App page](https://appshunter.io/ios/app/delta-is-mobile/id1618908198)

**In-app purchases:** none


## Frequently asked questions

### Is DevPrep free?

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

### Is Delta IS Mobile free?

Delta IS Mobile is free to download, with no in-app purchases.

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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.*