# Ring Sizer vs Caliper

The clearest difference is in-app purchases: Caliper at none against Ring Sizer's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Ring Sizer sells 2 in-app purchases, starting at $3.99 per 7 days. Caliper asks for nothing beyond the download.

Ring Sizer ships an update every 2 weeks, Caliper every 6 days. The most recent releases landed on October 2, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Ring Sizer | Caliper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (3 ratings)](https://appshunter.io/ios/app/ring-sizer-sizerly/id6746245798/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 2 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Dziyana Dashynevich](https://appshunter.io/developer/1815927618) | [UFUK OZDEMIR](https://appshunter.io/developer/1885204934) |

## What reviewers say

### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-sizerly/id6746245798)

Accurately determine your ring size using your phone's screen or a built-in ruler. Supports multiple international sizing standards and allows saving measurements for future use. Ideal for online shoppers and jewelers.

**Highlights:** Measure ring size via diameter or circumference, Supports US, UK, EU/ISO, AU, JP, CN, RU sizes, Built-in screen ruler for finger measurement, Save measurements for multiple users, Ad-free experience

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $3.99 | per 7 days |
| Annual Premium | $19.99 | per year |


### Caliper

[App page](https://appshunter.io/ios/app/caliper-level-ruler-and-angle/id6794116622)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ring Sizer free?

Ring Sizer is free to download, with in-app purchases available.

### Is Caliper free?

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

### Do Ring Sizer or Caliper have ads?

Neither Ring Sizer nor Caliper shows ads.

### Which is updated more often, Ring Sizer or Caliper?

Ring Sizer ships an update every 2 weeks, and Caliper every 6 days. Most recently, Ring Sizer was updated on October 2, 2026 and Caliper on October 13, 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.*