# Flying Ruler vs Ring Sizing

The clearest difference is price: Ring Sizing at Free against Flying Ruler's $1.99. Flying Ruler's advantage is rating (4.1 vs 1.0) and ratings volume (186 vs 1). On ads, in-app purchases and device support there is nothing between them.

Ring Sizing is free to download; Flying Ruler costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Flying Ruler holds the better App Store score, 4.1 against 1.0. That said, the two scores are not equally well evidenced: Flying Ruler has 186 ratings behind it against 1, so its average is the more settled of the two.

Flying Ruler ships an update every 2 months, Ring Sizing every 10 months. The most recent releases landed on October 29, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Flying Ruler | Ring Sizing |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.1 (186 ratings)](https://appshunter.io/ios/app/flying-ruler-3d-tape-measure/id667579844/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/ring-sizing/id1466446037/reviews) |
| Number of ratings | **186** | 1 |
| Positive reviews | 86.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 10 months |
| Monetization | Paid | **Free** |
| Size | 78 MB | 10 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ALEXEY BRILEV](https://appshunter.io/developer/667579847) | [Gerhard Lentschik](https://appshunter.io/developer/629988041) |

## What reviewers say

### Flying Ruler

[App page](https://appshunter.io/ios/app/flying-ruler-3d-tape-measure/id667579844)

Measure distances and angles using your device's sensors. This app functions as a ruler, tape measure, rangefinder, protractor, and 3D angle finder, offering a quick and accurate way to take measurements in various conditions.

**Highlights:** Measure distance by moving device, Ruler, tape measure, rangefinder, Protractor and 3D angle finder, Inertial navigational system technology, Adjustable units (inches/cm), Save measurements with photos, Avoid obstacles during measurement

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Convenient for quick measurements
- 💡 Clever use of phone sensors
- ⭐ Accurate for most use cases
- 🎨 Visually appealing interface

**What reviewers complain about**

- 🐛 Inconsistent measurement accuracy
- 📏 Not as precise as a physical ruler
- ⚠️ Requires multiple measurements for reliable results
- 🤔 Confusing calibration process

**Reported bugs**

- Measurements vary wildly between attempts
- Calibration process fails to complete
- App crashes when used with certain phone cases

**Requested features**

- Add imperial unit support
- Integrate with smart home devices
- Provide more advanced measurement tools
- Improve accuracy for smaller distances


### Ring Sizing

[App page](https://appshunter.io/ios/app/ring-sizing/id1466446037)

Accurately measure ring sizes using your phone's screen. Determine diameter, circumference, and convert between international sizing systems. Ideal for jewelers and shoppers needing precise measurements.

**Highlights:** Measure ring diameter on screen, Determine circumference in mm/inches, Pacher method calculation, International size conversion (EU, US, UK, JP), Precise slider for measurement

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

**In-app purchases:** none


## Frequently asked questions

### Is Flying Ruler free?

Flying Ruler costs $1.99, with no in-app purchases.

### Is Ring Sizing free?

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

### Which has better reviews, Flying Ruler or Ring Sizing?

Flying Ruler is rated higher. Flying Ruler averages 4.1 out of 5 from 186 ratings, while Ring Sizing averages 1.0 from 1 ratings.

### Do Flying Ruler or Ring Sizing have ads?

Neither Flying Ruler nor Ring Sizing shows ads.

### Which is updated more often, Flying Ruler or Ring Sizing?

Flying Ruler ships an update every 2 months, and Ring Sizing every 10 months. Most recently, Flying Ruler was updated on October 29, 2026 and Ring Sizing on October 12, 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.*