# Scan & Trace vs Ring Sizer

The clearest difference is in-app purchases: Scan & Trace at none against Ring Sizer's 2. Scan & Trace also leads on device support (3 vs 1) and iOS requirement (9.3 vs 17.0). Ring Sizer's advantage is update cadence (every 6 months vs every 18 months). On price and ads there is nothing between them.

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

Scan & Trace ships an update every 18 months, Ring Sizer every 6 months. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Scan & Trace | Ring Sizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ring-sizer-measure-and-try-on/id6759631149/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 6 months** |
| Size | 15 MB | 63 MB |
| Requires iOS | **9.3** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Viking Life-saving Equipment AS](https://appshunter.io/developer/1500726789) | [APPSURGE](https://appshunter.io/developer/1473427573) |

## What reviewers say

### Scan & Trace

[App page](https://appshunter.io/ios/app/scan-and-trace/id1500726790)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-measure-and-try-on/id6759631149)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.99 | per 7 days |
| Annual | $44.99 | per year |


## Frequently asked questions

### Is Scan & Trace free?

Scan & Trace is free to download, with no in-app purchases.

### Is Ring Sizer free?

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

### Do Scan & Trace or Ring Sizer have ads?

Neither Scan & Trace nor Ring Sizer shows ads.

### Which is updated more often, Scan & Trace or Ring Sizer?

Scan & Trace ships an update every 18 months, and Ring Sizer every 6 months. Most recently, Scan & Trace was updated on October 25, 2026 and Ring Sizer on October 28, 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.*