# National auto services vs Ring Sizer

The clearest difference is in-app purchases: National auto services at none against Ring Sizer's 3. National auto services also leads on update cadence (every 5 days vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Ring Sizer sells 3 in-app purchases, starting at $3.99 per 7 days. National auto services asks for nothing beyond the download.

National auto services ships an update every 5 days, Ring Sizer every 4 months. The most recent releases landed on September 17, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | National auto services | Ring Sizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (79 ratings)](https://appshunter.io/ios/app/ring-sizer-measure-ring-size/id6477376330/reviews)** |
| Number of ratings | — | **79** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 4 months |
| Monetization | — | Free with in-app purchases |
| Size | 126 MB | 22 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [IBRAHIM ABU BAKER AND HIS PARTNER](https://appshunter.io/developer/1612418300) | [TECHISTIC LTD](https://appshunter.io/developer/1628067321) |

## What reviewers say

### National auto services

[App page](https://appshunter.io/ios/app/national-auto-services/id1661090809)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-measure-ring-size/id6477376330)

Easily determine your precise ring size using your iPhone's camera. Get measurements in various units and international standards, with helpful guides and sharing options.

**Highlights:** Measure ring size with iPhone camera, Metric and imperial units, International ring size standards, Visual guides for accuracy, Save and share measurements, Includes ring sizing guide

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Measure Ring Size - Ring Sizer | $3.99 | per 7 days |
| Ring Sizer App: Ring Size Tool | $8.99 | per month |
| Ring Sizer Unlimited Access | $29.99 | per year |


## Frequently asked questions

### Is National auto services free?

National auto services 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 National auto services or Ring Sizer have ads?

Neither National auto services nor Ring Sizer shows ads.

### Which is updated more often, National auto services or Ring Sizer?

National auto services ships an update every 5 days, and Ring Sizer every 4 months. Most recently, National auto services was updated on September 17, 2026 and Ring Sizer on September 24, 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.*