# AB vs DP

The clearest difference is update cadence: AB at every 9 days against DP's every 2 months. 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 2 months. The most recent releases landed on October 13, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | AB | DP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Size | 12 MB | 6 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nichful](https://appshunter.io/developer/1871193294) | [Shunya Iwasaki](https://appshunter.io/developer/1796095304) |

## 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/id6789575681)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム(買い切り) | $14.99 | 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 2 months. Most recently, AB was updated on October 13, 2026 and DP on October 20, 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.*