# mos.viewer vs Phraseon

The clearest difference is in-app purchases: mos.viewer at none against Phraseon's 2. mos.viewer also leads on iOS requirement (13.0 vs 17.0). Phraseon's advantage is update cadence (fortnightly vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Phraseon sells 2 in-app purchases, starting at $9.99 per month. mos.viewer asks for nothing beyond the download.

mos.viewer ships an update every 4 months, Phraseon fortnightly. The most recent releases landed on September 28, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | mos.viewer | Phraseon |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Size | 23 MB | 20 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Fabrik 19 AG](https://appshunter.io/developer/501964744) | [Robert Adamczyk](https://appshunter.io/developer/1561487642) |

## What reviewers say

### mos.viewer

[App page](https://appshunter.io/ios/app/mosviewer/id6470921065)

**In-app purchases:** none


### Phraseon

[App page](https://appshunter.io/ios/app/phraseon/id6477338296)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $9.99 | per month |
| Yearly | $59.99 | per year |


## Frequently asked questions

### Is mos.viewer free?

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

### Is Phraseon free?

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

### Do mos.viewer or Phraseon have ads?

Neither mos.viewer nor Phraseon shows ads.

### Which is updated more often, mos.viewer or Phraseon?

mos.viewer ships an update every 4 months, and Phraseon fortnightly. Most recently, mos.viewer was updated on September 28, 2026 and Phraseon on September 17, 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.*