# NTK Portal vs ViSymulation Pro

The clearest difference is update cadence: ViSymulation Pro at every 3 weeks against NTK Portal's every 5 weeks. 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.

NTK Portal ships an update every 5 weeks, ViSymulation Pro every 3 weeks. The most recent releases landed on October 26, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | NTK Portal | ViSymulation Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Size | 13 MB | 240 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [NTK Academic Group](https://appshunter.io/developer/635797342) | [HKU TELI](https://appshunter.io/developer/1153931100) |

## What reviewers say

### NTK Portal

[App page](https://appshunter.io/ios/app/ntk-portal/id1031189972)

**Features:** macOS Compatibility

**In-app purchases:** none


### ViSymulation Pro

[App page](https://appshunter.io/ios/app/visymulation-pro/id6477567943)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NTK Portal free?

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

### Is ViSymulation Pro free?

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

### Do NTK Portal or ViSymulation Pro have ads?

Neither NTK Portal nor ViSymulation Pro shows ads.

### Which is updated more often, NTK Portal or ViSymulation Pro?

NTK Portal ships an update every 5 weeks, and ViSymulation Pro every 3 weeks. Most recently, NTK Portal was updated on October 26, 2026 and ViSymulation Pro on November 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*