# Femtek Sizer vs Riidaa

The clearest difference is price: Femtek Sizer at Free against Riidaa's $0.99. On ads, in-app purchases, device support and iOS requirement there is nothing between them.

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

## The numbers

| Metric | Femtek Sizer | Riidaa |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Monetization | Free | — |
| Size | 1 MB | 16 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Femtek PTY LTD](https://appshunter.io/developer/1552913506) | [Thomas Sturm](https://appshunter.io/developer/1735252059) |

## What reviewers say

### Femtek Sizer

[App page](https://appshunter.io/ios/app/femtek-sizer/id1664137756)

This utility app helps you find your ring size accurately using your phone's screen. Simply place a ring on your device and adjust the slider to match the size, eliminating the need for physical tools or guesswork.

**Highlights:** On-screen ring sizing, Slider adjustment for precise measurement, Eliminates need for physical tools, Troubleshooting guide available

**Features:** macOS Compatibility

**In-app purchases:** none


### Riidaa

[App page](https://appshunter.io/ios/app/riidaa/id6743688839)

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

**In-app purchases:** none


## Frequently asked questions

### Is Femtek Sizer free?

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

### Is Riidaa free?

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

### Do Femtek Sizer or Riidaa have ads?

Neither Femtek Sizer nor Riidaa 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.*