# ViscoelasticsApp vs BASIS Prague

The clearest difference is in-app purchases: BASIS Prague at none against ViscoelasticsApp's 2. ViscoelasticsApp's advantage is update cadence (every 4 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ViscoelasticsApp sells 2 in-app purchases, starting at $4.99 per month. BASIS Prague asks for nothing beyond the download.

ViscoelasticsApp ships an update every 4 days, BASIS Prague every 3 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ViscoelasticsApp | BASIS Prague |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Size | 42 MB | 66 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [MONGICORE S.A.S](https://appshunter.io/developer/1896712619) | [SPORK Holdings, LLC.](https://appshunter.io/developer/1747700301) |

## What reviewers say

### ViscoelasticsApp

[App page](https://appshunter.io/ios/app/viscoelasticsapp/id6770065023)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $4.99 | per month |
| Premium Yearly | $44.99 | per year |


### BASIS Prague

[App page](https://appshunter.io/ios/app/basis-prague/id6786581179)

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

**In-app purchases:** none


## Frequently asked questions

### Is ViscoelasticsApp free?

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

### Is BASIS Prague free?

BASIS Prague is free to download, with no in-app purchases.

### Do ViscoelasticsApp or BASIS Prague have ads?

Neither ViscoelasticsApp nor BASIS Prague shows ads.

### Which is updated more often, ViscoelasticsApp or BASIS Prague?

ViscoelasticsApp ships an update every 4 days, and BASIS Prague every 3 weeks. Most recently, ViscoelasticsApp was updated on November 5, 2026 and BASIS Prague on October 31, 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.*