# StereoCards vs MPO Viewer

The clearest difference is in-app purchases: StereoCards at none against MPO Viewer's 1. StereoCards also leads on iOS requirement (15.1 vs 26.0). MPO Viewer's advantage is update cadence (every 2 days vs every 11 months). On price, ads and device support there is nothing between them.

Both are free to download. MPO Viewer sells 1 one-off in-app purchase. StereoCards asks for nothing beyond the download.

StereoCards ships an update every 11 months, MPO Viewer every 2 days. The most recent releases landed on September 15, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | StereoCards | MPO Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 days** |
| Size | 355 MB | 4 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [Denk Manufaktur für IT-Lösungen KG](https://appshunter.io/developer/1449716447) | [G.G. van der Steen](https://appshunter.io/developer/6800212440) |

## What reviewers say

### StereoCards

[App page](https://appshunter.io/ios/app/stereocards/id6618153180)

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

**In-app purchases:** none


### MPO Viewer

[App page](https://appshunter.io/ios/app/mpo-viewer/id6800211928)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MPO Viewer Pro | $4.99 | one-time |


## Frequently asked questions

### Is StereoCards free?

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

### Is MPO Viewer free?

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

### Do StereoCards or MPO Viewer have ads?

Neither StereoCards nor MPO Viewer shows ads.

### Which is updated more often, StereoCards or MPO Viewer?

StereoCards ships an update every 11 months, and MPO Viewer every 2 days. Most recently, StereoCards was updated on September 15, 2026 and MPO Viewer on September 18, 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.*