# 求知 vs 专业指南针

The clearest difference is in-app purchases: 求知 at none against 专业指南针's 4. 求知 also leads on iOS requirement (12.0 vs 15). 专业指南针's advantage is ads (none vs shown) and update cadence (every 4 days vs every 10 days). On price and device support there is nothing between them.

Both are free to download. 专业指南针 sells 4 in-app purchases, starting at $6.99 per 7 days. 求知 asks for nothing beyond the download.

求知 ships an update every 10 days, 专业指南针 every 4 days. The most recent releases landed on September 12, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | 求知 | 专业指南针 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/gps/id6752315093/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 14.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 10 days | **Every 4 days** |
| Monetization | — | Freemium |
| Size | 94 MB | 43 MB |
| Requires iOS | **12.0** | 15 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [常州乐活旅游投资有限公司](https://appshunter.io/developer/1023257601) | [Hutui tech](https://appshunter.io/developer/1814030829) |

## What reviewers say

### 求知

[App page](https://appshunter.io/ios/app/ai/id6743887031)

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

**In-app purchases:** none


### 专业指南针

[App page](https://appshunter.io/ios/app/gps/id6752315093)

This app offers precise directional guidance and location services, featuring a high-accuracy compass, altitude, and coordinate display. It also includes a smart level tool, real-time weather updates, and a camera that adds location-based watermarks to photos.

**Highlights:** High-accuracy electronic compass, Altitude and coordinate display, Smart level tool, Real-time weather information, Watermark camera with location data, Outdoor navigation and life assistant

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 立即使用专业指南针 | $6.99 | per 7 days |
| 立即使用 | $6.99 | per 7 days |
| 立即使用 | $6.99 | per 7 days |
| 立即使用专业指南针 | $29.99 | per year |


## Frequently asked questions

### Is 求知 free?

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

### Is 专业指南针 free?

专业指南针 is free to download, with in-app purchases available.

### Do 求知 or 专业指南针 have ads?

求知 shows ads; 专业指南针 does not.

### Which is updated more often, 求知 or 专业指南针?

求知 ships an update every 10 days, and 专业指南针 every 4 days. Most recently, 求知 was updated on September 12, 2026 and 专业指南针 on September 22, 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.*