# PhotoRelay vs QSDC

The clearest difference is in-app purchases: QSDC at none against PhotoRelay's 1. PhotoRelay's advantage is iOS requirement (18.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

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

PhotoRelay ships an update monthly, QSDC every 2 weeks. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | PhotoRelay | QSDC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Size | 3 MB | 16 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [志炯 陈](https://appshunter.io/developer/1619306695) | [Seung Hyun Jin](https://appshunter.io/developer/585609773) |

## What reviewers say

### PhotoRelay

[App page](https://appshunter.io/ios/app/photorelay/id6751777519)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Original View | $4.99 | one-time |


### QSDC

[App page](https://appshunter.io/ios/app/qsdc/id6782549424)

**Features:** iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is PhotoRelay free?

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

### Is QSDC free?

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

### Do PhotoRelay or QSDC have ads?

Neither PhotoRelay nor QSDC shows ads.

### Which is updated more often, PhotoRelay or QSDC?

PhotoRelay ships an update monthly, and QSDC every 2 weeks. Most recently, PhotoRelay was updated on November 6, 2026 and QSDC on November 5, 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.*