# Tamarin.app vs Ring Sizer

The clearest difference is ads: Tamarin.app at none against Ring Sizer's shown. Tamarin.app also leads on device support (3 vs 1) and iOS requirement (14.2 vs 16.6). Ring Sizer's advantage is update cadence (fortnightly vs monthly). On price and in-app purchases there is nothing between them.

Both are free to download. Tamarin.app sells 1 one-off in-app purchase and Ring Sizer sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Tamarin.app ships an update monthly, Ring Sizer fortnightly. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Tamarin.app | Ring Sizer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Fortnightly** |
| Size | 75 MB | 62 MB |
| Requires iOS | **14.2** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sudelli](https://appshunter.io/developer/1671369128) | [Mastertex Fab](https://appshunter.io/developer/1857166298) |

## What reviewers say

### Tamarin.app

[App page](https://appshunter.io/ios/app/tamarinapp/id1671369126)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month subscription | $17.99 | one-time |


### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-finger-size/id6788002855)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MeasureRing One Week | $4.99 | per 7 days |
| MeasureRing One Year | $19.99 | per year |


## Frequently asked questions

### Is Tamarin.app free?

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

### Is Ring Sizer free?

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

### Do Tamarin.app or Ring Sizer have ads?

Ring Sizer shows ads; Tamarin.app does not.

### Which is updated more often, Tamarin.app or Ring Sizer?

Tamarin.app ships an update monthly, and Ring Sizer fortnightly. Most recently, Tamarin.app was updated on October 27, 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.*