# QPP vs ZDiiin

The clearest difference is in-app purchases: ZDiiin at none against QPP's 4. ZDiiin also leads on iOS requirement (9.0 vs 13.0). QPP's advantage is update cadence (monthly vs every 17 months). On price, ads and device support there is nothing between them.

Both are free to download. QPP sells 4 one-off in-app purchases. ZDiiin asks for nothing beyond the download.

QPP ships an update monthly, ZDiiin every 17 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | QPP | ZDiiin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/qpp-the-digital-backpack/id1501319938/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 44.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 17 months |
| Monetization | Free with in-app purchases | — |
| Size | 58 MB | 26 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HOLY BUSINESS CO., LTD](https://appshunter.io/developer/1501319937) | [Chun Jung Ho](https://appshunter.io/developer/1647095579) |

## What reviewers say

### QPP

[App page](https://appshunter.io/ios/app/qpp-the-digital-backpack/id1501319938)

This app offers a secure and convenient way to manage digital items and create digital member cards. Easily transfer items to friends and build a social circle with quick registration.

**Highlights:** Create and transfer digital items, Secure item transfer, Quick registration via phone number, Import contacts easily, Build social circles, Digital backpack management, Create digital member cards

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Transfer Pack | $0.99 | one-time |
| Silver Package | $4.99 | one-time |
| Gold Package | $24.99 | one-time |
| Platinum Package | $48.99 | one-time |


### ZDiiin

[App page](https://appshunter.io/ios/app/zdiiin/id6443550105)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is QPP free?

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

### Is ZDiiin free?

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

### Do QPP or ZDiiin have ads?

Neither QPP nor ZDiiin shows ads.

### Which is updated more often, QPP or ZDiiin?

QPP ships an update monthly, and ZDiiin every 17 months. Most recently, QPP was updated on November 3, 2026 and ZDiiin on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*