# CoilCalc vs RTF Converter

The clearest difference is in-app purchases: CoilCalc at none against RTF Converter's 3. RTF Converter's advantage is iOS requirement (16.0 vs 26.1). On price, ads and device support there is nothing between them.

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

## The numbers

| Metric | CoilCalc | RTF Converter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 months |
| Size | 1 MB | 7 MB |
| Requires iOS | 26.1 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [VortexCom UG (haftungsbeschränkt)](https://appshunter.io/developer/1830473436) | [Muhammad Zikaria](https://appshunter.io/developer/1825902592) |

## What reviewers say

### CoilCalc

[App page](https://appshunter.io/ios/app/coilcalc/id6756119384)

**Features:** macOS Compatibility

**In-app purchases:** none


### RTF Converter

[App page](https://appshunter.io/ios/app/rtf-converter-pdf-and-doc-tools/id6768378651)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $4.99 | per 7 days |
| Monthly Plan | $9.99 | per month |
| Yearly Plan | $19.99 | per year |


## Frequently asked questions

### Is CoilCalc free?

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

### Is RTF Converter free?

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

### Do CoilCalc or RTF Converter have ads?

Neither CoilCalc nor RTF Converter shows ads.

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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.*