# AZ vs DP

The clearest difference is in-app purchases: AZ at none against DP's 1. DP's advantage is ads (none vs shown) and device support (3 vs 1). On price and update cadence there is nothing between them.

Both are free to download. DP sells 1 one-off in-app purchase. AZ asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | AZ | DP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 days | Every 4 days |
| Size | 7 MB | 145 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tom App Works](https://appshunter.io/developer/1874760041) | [CHOI SEONGMIN](https://appshunter.io/developer/6772332527) |

## What reviewers say

### AZ

[App page](https://appshunter.io/ios/app/az-900-ai/id6777317783)

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

**In-app purchases:** none


### 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 AZ free?

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

### Is DP free?

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

### Do AZ or DP have ads?

AZ shows ads; DP does not.

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

AZ ships an update every 4 days, and DP every 4 days. Most recently, AZ was updated on October 31, 2026 and DP on November 10, 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.*