# HTML Viewer vs ThermoCALC

The clearest difference is in-app purchases: ThermoCALC at none against HTML Viewer's 3. HTML Viewer's advantage is iOS requirement (15.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. HTML Viewer sells 3 in-app purchases, starting at $4.99 per 7 days. ThermoCALC asks for nothing beyond the download.

## The numbers

| Metric | HTML Viewer | ThermoCALC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | — |
| Size | 26 MB | 6 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [明航 李](https://appshunter.io/developer/1823569127) | [DAVID BURCHIANTI](https://appshunter.io/developer/6799716631) |

## What reviewers say

### HTML Viewer

[App page](https://appshunter.io/ios/app/html-viewer-htmly/id6780105308)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access | $4.99 | per 7 days |
| Unlimited access | $24.99 | per year |
| Unlimited access | $24.99 | per year |


### ThermoCALC

[App page](https://appshunter.io/ios/app/thermocalc/id6800330978)

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

**In-app purchases:** none


## Frequently asked questions

### Is HTML Viewer free?

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

### Is ThermoCALC free?

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

### Do HTML Viewer or ThermoCALC have ads?

Neither HTML Viewer nor ThermoCALC shows ads.

---

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