# O vs 定位助手

The clearest difference is review sentiment: O at 100% against 定位助手's 50%. O also leads on rating (5.0 vs 1.0) and in-app purchases (none vs 1). 定位助手's advantage is update cadence (every 2 months vs every 11 months) and ratings volume (3 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. 定位助手 sells 1 one-off in-app purchase. O asks for nothing beyond the download.

O holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 100% of O's written reviews are positive against 50% of 定位助手's.

O ships an update every 11 months, 定位助手 every 2 months. Both last shipped on September 26, 2026.

## The numbers

| Metric | O | 定位助手 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/o-ring-master/id1072051820/reviews)** | [1.0 (3 ratings)](https://appshunter.io/ios/app/and/id6739753308/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 47 MB | 11 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [GE MAO RUBBER INDUSTRIAL CO., LTD.](https://appshunter.io/developer/1078558543) | [Shibumon Te](https://appshunter.io/developer/1786859158) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-ring-master/id1072051820)

This app provides a comprehensive offline tool for selecting standard rubber seal sizes, including O-Rings, X-Rings, and Back-Up Rings. It offers dimension searches, housing calculations for various sealing applications, and supports multiple international standards in both metric and imperial units.

**Highlights:** Offline standard rubber seal size selection, Search for O-Ring, X-Ring, and Back-Up Ring sizes, O-Ring housing calculations for sealing applications, Supports multiple international standards (AS568, METRIC, JIS, etc.), Metric and Imperial unit support, Substitutable O-Ring size suggestions

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

**In-app purchases:** none


### 定位助手

[App page](https://appshunter.io/ios/app/and/id6739753308)

This utility app offers a suite of tools including coordinate picking, location modification, GIF creation, media trimming, text extraction, and QR code generation. It aims to provide a range of practical functions for users.

**Highlights:** Virtual location modification, Coordinate picking, Image to GIF conversion, Media trimming and conversion, Text extraction, QR code generation

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 永久会员 | $3.99 | one-time |


## Frequently asked questions

### Is O free?

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

### Is 定位助手 free?

定位助手 is free to download, with in-app purchases available.

### Which has better reviews, O or 定位助手?

O is rated higher. O averages 5.0 out of 5 from 1 ratings, while 定位助手 averages 1.0 from 3 ratings.

### Do O or 定位助手 have ads?

Neither O nor 定位助手 shows ads.

### Which is updated more often, O or 定位助手?

O ships an update every 11 months, and 定位助手 every 2 months. Most recently, O was updated on September 26, 2026 and 定位助手 on September 26, 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.*