# AB vs DP

The clearest difference is update cadence: DP at every 4 days against AB's every 9 days. DP also leads on iOS requirement (15.1 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. AB sells 1 one-off in-app purchase and DP sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

AB ships an update every 9 days, DP every 4 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | AB | DP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 4 days** |
| Size | 12 MB | 145 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nichful](https://appshunter.io/developer/1871193294) | [CHOI SEONGMIN](https://appshunter.io/developer/6772332527) |

## What reviewers say

### AB

[App page](https://appshunter.io/ios/app/ab-900-prep-m365-admin/id6776277539)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Questions | $12.99 | one-time |


### DP

[App page](https://appshunter.io/ios/app/dp-900-data-fundamentals-study/id6782107654)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DP-900 Lifetime Access | $4.99 | one-time |


## Frequently asked questions

### Is AB free?

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

### Is DP free?

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

### Do AB or DP have ads?

Neither AB nor DP shows ads.

### Which is updated more often, AB or DP?

AB ships an update every 9 days, and DP every 4 days. Most recently, AB was updated on October 25, 2026 and DP on October 24, 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.*