# O vs 汇率管家

The clearest difference is price: O at Free against 汇率管家's $1.99. O also leads on iOS requirement (12.1 vs 15). On ads, in-app purchases and device support there is nothing between them.

O is free to download; 汇率管家 costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | O | 汇率管家 |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[3.8 (5 ratings)](https://appshunter.io/ios/app/o-ring/id485346224/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Free | — |
| Size | 26 MB | 9 MB |
| Requires iOS | **12.1** | 15 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [Guangzhou Shengqi Network Technology Co.,Ltd.](https://appshunter.io/developer/1673930230) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-ring/id485346224)

This app helps users calculate O-Ring dimensions and find compatible materials for their applications. It provides recommendations based on ISO standards and supports both metric and inch measurements.

**Highlights:** O-Ring housing calculation, O-Ring size recommendations by ISO standard, Quick search by national/international standards, O-Ring tolerance calculation, Metric and inch unit switching, Chemical compatibility check, Integration of Trelleborg Sealing Solutions Videos

**Features:** macOS Compatibility

**In-app purchases:** none


### 汇率管家

[App page](https://appshunter.io/ios/app/id6760175260)

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

**In-app purchases:** none


## Frequently asked questions

### Is O free?

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

### Is 汇率管家 free?

汇率管家 costs $1.99, with no in-app purchases.

### Do O or 汇率管家 have ads?

Neither O nor 汇率管家 shows ads.

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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.*