# 数形加油站HD vs AI指南针助手

The clearest difference is in-app purchases: 数形加油站HD at none against AI指南针助手's 3. 数形加油站HD also leads on iOS requirement (9.0 vs 13.0). AI指南针助手's advantage is device support (3 vs 1). On price, update cadence and ads there is nothing between them.

Both are free to download. AI指南针助手 sells 3 in-app purchases, starting at $9.99 per 7 days. 数形加油站HD asks for nothing beyond the download.

数形加油站HD ships an update every 3 weeks, AI指南针助手 monthly. The most recent releases landed on September 18, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 数形加油站HD | AI指南针助手 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 191 MB | 60 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Beijing Ruozhuo Technology Co., Ltd](https://appshunter.io/developer/1758901031) | [忠法 周](https://appshunter.io/developer/1670518732) |

## What reviewers say

### 数形加油站HD

[App page](https://appshunter.io/ios/app/hd/id6751450237)

**Features:** macOS Compatibility

**In-app purchases:** none


### AI指南针助手

[App page](https://appshunter.io/ios/app/ai/id6753898094)

This utility app provides precise location data, including latitude, longitude, and altitude, along with real-time weather information. It offers features like GPS speed measurement, wind direction tracking, and the ability to capture photos with embedded location data. Unlock premium features for an ad-free experience and unlimited usage.

**Highlights:** Latitude and longitude display, Altitude measurement, Real-time weather updates, GPS speed tracking, Wind direction recording, Photo geotagging

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI指南针助手专业版 | $9.99 | per 7 days |
| AI指南针助手专业版 | $14.99 | per 7 days |
| AI指南针助手专业Pro+ | $14.99 | per month |


## Frequently asked questions

### Is 数形加油站HD free?

数形加油站HD is free to download, with no in-app purchases.

### Is AI指南针助手 free?

AI指南针助手 is free to download, with in-app purchases available.

### Do 数形加油站HD or AI指南针助手 have ads?

Neither 数形加油站HD nor AI指南针助手 shows ads.

### Which is updated more often, 数形加油站HD or AI指南针助手?

数形加油站HD ships an update every 3 weeks, and AI指南针助手 monthly. Most recently, 数形加油站HD was updated on September 18, 2026 and AI指南针助手 on October 7, 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.*