# Triangle Area Calculator Pro vs Ring Sizer

The clearest difference is price: Ring Sizer at Free against Triangle Area Calculator Pro's $1.99. Ring Sizer also leads on update cadence (every 2 days vs every 38 months). Triangle Area Calculator Pro's advantage is in-app purchases (none vs 4) and device support (3 vs 1). On ads there is nothing between them.

Ring Sizer is free to download; Triangle Area Calculator Pro costs $1.99 up front. Ring Sizer sells 4 in-app purchases, starting at $6.99 per 7 days. Triangle Area Calculator Pro asks for nothing beyond the download.

Triangle Area Calculator Pro ships an update every 38 months, Ring Sizer every 2 days. The most recent releases landed on September 25, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Triangle Area Calculator Pro | Ring Sizer |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[4.5 (22 ratings)](https://appshunter.io/ios/app/ring-sizer-measuring-tool-app/id6476114277/reviews)** |
| Number of ratings | — | **22** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 0 MB | 56 MB |
| Requires iOS | **14.2** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Anna Filobok](https://appshunter.io/developer/1613515832) | [Francis Flores](https://appshunter.io/developer/1783813786) |

## What reviewers say

### Triangle Area Calculator Pro

[App page](https://appshunter.io/ios/app/triangle-area-calculator-pro/id1568248433)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-measuring-tool-app/id6476114277)

Easily determine your precise ring size with this user-friendly tool. Avoid guesswork and ensure a perfect fit for your next ring purchase, whether for yourself or a gift.  It simplifies the sizing process for accurate results.

**Highlights:** Effortless ring size gauging, Guarantees a flawless fit, User-friendly experience, Precise measurement, Simplifies sizing process

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ring Size Gauge & Measurement | $6.99 | per 7 days |
| Ring Size Gauge & Measurement | $6.99 | per 7 days |
| Ring Sizer App: Measuring Tool | $19.99 | per month |
| Ring Size Gauge & Measurement | $39.99 | per year |


## Frequently asked questions

### Is Triangle Area Calculator Pro free?

Triangle Area Calculator Pro costs $1.99, with no in-app purchases.

### Is Ring Sizer free?

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

### Do Triangle Area Calculator Pro or Ring Sizer have ads?

Neither Triangle Area Calculator Pro nor Ring Sizer shows ads.

### Which is updated more often, Triangle Area Calculator Pro or Ring Sizer?

Triangle Area Calculator Pro ships an update every 38 months, and Ring Sizer every 2 days. Most recently, Triangle Area Calculator Pro was updated on September 25, 2026 and Ring Sizer on September 9, 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.*