# Ring Sizing vs Nasu

The clearest difference is update cadence: Nasu at fortnightly against Ring Sizing's every 10 months. Nasu also leads on iOS requirement (17.5 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Ring Sizing ships an update every 10 months, Nasu fortnightly. The most recent releases landed on August 17, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Ring Sizing | Nasu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/ring-sizing/id1466446037/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 10 MB | 9 MB |
| Requires iOS | 26.0 | **17.5** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gerhard Lentschik](https://appshunter.io/developer/629988041) | [Zebel OU](https://appshunter.io/developer/882509165) |

## What reviewers say

### 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


### Nasu

[App page](https://appshunter.io/ios/app/nasu-therapy-session-notes/id6677000272)

**In-app purchases:** none


## Frequently asked questions

### Is Ring Sizing free?

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

### Is Nasu free?

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

### Do Ring Sizing or Nasu have ads?

Neither Ring Sizing nor Nasu shows ads.

### Which is updated more often, Ring Sizing or Nasu?

Ring Sizing ships an update every 10 months, and Nasu fortnightly. Most recently, Ring Sizing was updated on August 17, 2026 and Nasu on September 11, 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.*