# Ontrasys Pro vs TH View

The clearest difference is update cadence: TH View at every 3 weeks against Ontrasys Pro's every 3 months. TH View also leads on iOS requirement (11.0 vs 13.6). 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.

Ontrasys Pro ships an update every 3 months, TH View every 3 weeks. Both last shipped on September 16, 2026.

## The numbers

| Metric | Ontrasys Pro | TH View |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 17 MB | 13 MB |
| Requires iOS | 13.6 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TOPPAN PRINTING CO.,LTD.](https://appshunter.io/developer/373909233) | [SHINYEI TECHNOLOGY CO.,LTD](https://appshunter.io/developer/1460229492) |

## What reviewers say

### Ontrasys Pro

[App page](https://appshunter.io/ios/app/ontrasys-pro/id1486536359)

**Features:** macOS Compatibility

**In-app purchases:** none


### TH View

[App page](https://appshunter.io/ios/app/th-view/id1508960620)

**In-app purchases:** none


## Frequently asked questions

### Is Ontrasys Pro free?

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

### Is TH View free?

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

### Do Ontrasys Pro or TH View have ads?

Neither Ontrasys Pro nor TH View shows ads.

### Which is updated more often, Ontrasys Pro or TH View?

Ontrasys Pro ships an update every 3 months, and TH View every 3 weeks. Most recently, Ontrasys Pro was updated on September 16, 2026 and TH View on September 16, 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.*