# 指南针 vs 上海地铁助手

The clearest difference is price: 指南针 at Free against 上海地铁助手's $1.99. 指南针 also leads on ads (none vs shown) and iOS requirement (14.0 vs 16.6). 上海地铁助手's advantage is in-app purchases (none vs 1). On update cadence and device support there is nothing between them.

指南针 is free to download; 上海地铁助手 costs $1.99 up front. 指南针 sells 1 one-off in-app purchase. 上海地铁助手 asks for nothing beyond the download.

指南针 ships an update every 3 months, 上海地铁助手 every 2 months. The most recent releases landed on October 20, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | 指南针 | 上海地铁助手 |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.8 (44 ratings)](https://appshunter.io/ios/app/gps/id6446302179/reviews)** | — |
| Number of ratings | **44** | — |
| Positive reviews | 90.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 4 MB | 36 MB |
| Requires iOS | **14.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [智平 刘](https://appshunter.io/developer/1125861933) | [乐祥 胡](https://appshunter.io/developer/1572365721) |

## What reviewers say

### 指南针

[App page](https://appshunter.io/ios/app/gps/id6446302179)

This app provides real-time environmental data including altitude, pressure, and GPS coordinates. It offers customizable display modes and supports both GPS and phone altimeter data sources. Designed for simplicity and efficiency, it ensures a clean, ad-free user experience.

**Highlights:** Altitude, pressure, and GPS data display, Switchable GPS or phone altimeter sources, Dark and light mode support, UI customization, Ad-free experience, Minimal resource usage

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 指南针PLUS 永久买断会员 | $1.99 | one-time |


### 上海地铁助手

[App page](https://appshunter.io/ios/app/id6736857821)

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

**In-app purchases:** none


## Frequently asked questions

### Is 指南针 free?

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

### Is 上海地铁助手 free?

上海地铁助手 costs $1.99, with no in-app purchases.

### Do 指南针 or 上海地铁助手 have ads?

上海地铁助手 shows ads; 指南针 does not.

### Which is updated more often, 指南针 or 上海地铁助手?

指南针 ships an update every 3 months, and 上海地铁助手 every 2 months. Most recently, 指南针 was updated on October 20, 2026 and 上海地铁助手 on October 16, 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.*