# Fundus Link vs Ring Sizer

The clearest difference is in-app purchases: Fundus Link at none against Ring Sizer's 3. Fundus Link also leads on update cadence (every 9 days vs every 3 weeks) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

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

Fundus Link ships an update every 9 days, Ring Sizer every 3 weeks. The most recent releases landed on September 29, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Fundus Link | Ring Sizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (35 ratings)](https://appshunter.io/ios/app/ring-sizer-ring-measure/id6739887211/reviews)** |
| Number of ratings | — | **35** |
| Positive reviews | — | 71.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 11 MB | 29 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RainsOptics Limited](https://appshunter.io/developer/1428224518) | [Ramkumar Vellaisamy](https://appshunter.io/developer/1706335914) |

## What reviewers say

### Fundus Link

[App page](https://appshunter.io/ios/app/fundus-link/id6467824481)

**In-app purchases:** none


### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-ring-measure/id6739887211)

Instantly determine your precise ring size for online shopping, custom orders, or gift purchases. Offers multiple international sizing standards and saves your measurements for future use. Get accurate results with clear, step-by-step instructions.

**Highlights:** Instant ring size measurement, Support for multiple international sizing standards, Save and access size history, Step-by-step measurement guidance, Measure for custom ring widths

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ring Sizer Weekly | $3.99 | per 7 days |
| Ring Sizer Yearly | $9.99 | per year |
| Ring Sizer Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is Fundus Link free?

Fundus Link 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 Fundus Link or Ring Sizer have ads?

Neither Fundus Link nor Ring Sizer shows ads.

### Which is updated more often, Fundus Link or Ring Sizer?

Fundus Link ships an update every 9 days, and Ring Sizer every 3 weeks. Most recently, Fundus Link was updated on September 29, 2026 and Ring Sizer on October 8, 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.*