# PTI viewer vs Teradek Prism

The clearest difference is update cadence: Teradek Prism at every 3 months against PTI viewer's every 7 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PTI viewer ships an update every 7 months, Teradek Prism every 3 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | PTI viewer | Teradek Prism |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Size | 64 MB | 65 MB |
| Requires iOS | **12.0** | 13.2 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Playback Technologies, Inc.](https://appshunter.io/developer/1462645155) | [Teradek](https://appshunter.io/developer/450852792) |

## What reviewers say

### PTI viewer

[App page](https://appshunter.io/ios/app/pti-viewer/id1487227584)

**In-app purchases:** none


### Teradek Prism

[App page](https://appshunter.io/ios/app/teradek-prism/id1582532805)

**In-app purchases:** none


## Frequently asked questions

### Is PTI viewer free?

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

### Is Teradek Prism free?

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

### Do PTI viewer or Teradek Prism have ads?

Neither PTI viewer nor Teradek Prism shows ads.

### Which is updated more often, PTI viewer or Teradek Prism?

PTI viewer ships an update every 7 months, and Teradek Prism every 3 months. Most recently, PTI viewer was updated on November 3, 2026 and Teradek Prism on November 3, 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.*