# REINER SCT Authenticator vs Marko Viewer

The clearest difference is in-app purchases: REINER SCT Authenticator at none against Marko Viewer's 1. REINER SCT Authenticator also leads on iOS requirement (15.0 vs 26.2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Marko Viewer sells 1 one-off in-app purchase. REINER SCT Authenticator asks for nothing beyond the download.

REINER SCT Authenticator ships an update every 5 weeks, Marko Viewer every 2 months. The most recent releases landed on October 16, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | REINER SCT Authenticator | Marko Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Size | 178 MB | 15 MB |
| Requires iOS | **15.0** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [REINER SCT](https://appshunter.io/developer/635800415) | [E-String Technologies, Inc.](https://appshunter.io/developer/294199643) |

## What reviewers say

### REINER SCT Authenticator

[App page](https://appshunter.io/ios/app/reiner-sct-authenticator/id6757697786)

**In-app purchases:** none


### Marko Viewer

[App page](https://appshunter.io/ios/app/marko-viewer/id6759970069)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Marko Viewer | $4.99 | one-time |


## Frequently asked questions

### Is REINER SCT Authenticator free?

REINER SCT Authenticator is free to download, with no in-app purchases.

### Is Marko Viewer free?

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

### Do REINER SCT Authenticator or Marko Viewer have ads?

Neither REINER SCT Authenticator nor Marko Viewer shows ads.

### Which is updated more often, REINER SCT Authenticator or Marko Viewer?

REINER SCT Authenticator ships an update every 5 weeks, and Marko Viewer every 2 months. Most recently, REINER SCT Authenticator was updated on October 16, 2026 and Marko Viewer on October 11, 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.*