# ISS iGuard vs Ring sizer

The clearest difference is ads: ISS iGuard at none against Ring sizer's shown. ISS iGuard also leads on update cadence (every 4 months vs every 8 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

ISS iGuard ships an update every 4 months, Ring sizer every 8 months. The most recent releases landed on September 28, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | ISS iGuard | Ring sizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (13 ratings)](https://appshunter.io/ios/app/ring-sizer-unit-convertor/id1566103820/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | — | 64.1% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 months** | Every 8 months |
| Monetization | — | Ad-supported |
| Size | 95 MB | 48 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Infratec Security Systems](https://appshunter.io/developer/1389685856) | [Regent Branding Ltd](https://appshunter.io/developer/1128207635) |

## What reviewers say

### ISS iGuard

[App page](https://appshunter.io/ios/app/iss-iguard/id973087448)

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

**In-app purchases:** none


### Ring sizer

[App page](https://appshunter.io/ios/app/ring-sizer-unit-convertor/id1566103820)

Easily determine your accurate ring size and convert between international sizing standards. This tool helps you find the perfect fit for any ring, avoiding the frustration of ill-fitting jewelry. Save your sizes and compare them effortlessly.

**Highlights:** Accurate ring and finger size measurement, Convert between international ring size standards (US, UK, EU), Simple and easy-to-use interface, Supports a wide range of ring sizes, Save and compare ring sizes, Unit conversion functionality

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ISS iGuard free?

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

### Is Ring sizer free?

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

### Do ISS iGuard or Ring sizer have ads?

Ring sizer shows ads; ISS iGuard does not.

### Which is updated more often, ISS iGuard or Ring sizer?

ISS iGuard ships an update every 4 months, and Ring sizer every 8 months. Most recently, ISS iGuard was updated on September 28, 2026 and Ring sizer on October 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.*