# RF vs TavKey

The clearest difference is price: TavKey at Free against RF's $0.99. TavKey also leads on update cadence (every 2 months vs every 8 months). RF's advantage is iOS requirement (13.0 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

TavKey is free to download; RF costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RF ships an update every 8 months, TavKey every 2 months. The most recent releases landed on October 7, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | RF | TavKey |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Size | 6 MB | 6 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Julien Geissbuehler](https://appshunter.io/developer/1762554076) | [Yaron Shemesh](https://appshunter.io/developer/6790495661) |

## What reviewers say

### RF

[App page](https://appshunter.io/ios/app/rf-calc/id647697327)

**Features:** macOS Compatibility

**In-app purchases:** none


### TavKey

[App page](https://appshunter.io/ios/app/tavkey/id6790495659)

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

**In-app purchases:** none


## Frequently asked questions

### Is RF free?

RF costs $0.99, with no in-app purchases.

### Is TavKey free?

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

### Do RF or TavKey have ads?

Neither RF nor TavKey shows ads.

### Which is updated more often, RF or TavKey?

RF ships an update every 8 months, and TavKey every 2 months. Most recently, RF was updated on October 7, 2026 and TavKey on September 29, 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.*