# 海拔 Pro vs 沧县市民通

The clearest difference is in-app purchases: 沧县市民通 at none against 海拔 Pro's 3. 沧县市民通 also leads on ads (none vs shown) and update cadence (every 9 days vs monthly). On price and device support there is nothing between them.

Both are free to download. 海拔 Pro sells 3 in-app purchases, starting at $2.99 per month. 沧县市民通 asks for nothing beyond the download.

海拔 Pro ships an update monthly, 沧县市民通 every 9 days. The most recent releases landed on October 3, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | 海拔 Pro | 沧县市民通 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pro/id1603666667/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 33 MB |
| Requires iOS | 17.0 | **11.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [上海氢木科技有限公司](https://appshunter.io/developer/1546421993) | [河北科艺智慧能源发展有限公司](https://appshunter.io/developer/1586933335) |

## What reviewers say

### 海拔 Pro

[App page](https://appshunter.io/ios/app/pro/id1603666667)

This utility app provides real-time altitude and compass readings, combining GPS and barometer data. It allows users to record and track their exploration data, including altitude, coordinates, and ascent speed, with historical trend charts for review.

**Highlights:** Real-time altitude display, Smart compass with 72-degree scale, Record exploration data (altitude, coordinates, pressure), Historical trend charts, Meters and feet unit switching

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 海拔Pro 连续包月 | $2.99 | per month |
| 海拔Pro连续包年 | $59.99 | per year |
| 永久会员 | $24.99 | one-time |


### 沧县市民通

[App page](https://appshunter.io/ios/app/id6499110820)

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

**In-app purchases:** none


## Frequently asked questions

### Is 海拔 Pro free?

海拔 Pro is free to download, with in-app purchases available.

### Is 沧县市民通 free?

沧县市民通 is free to download, with no in-app purchases.

### Do 海拔 Pro or 沧县市民通 have ads?

海拔 Pro shows ads; 沧县市民通 does not.

### Which is updated more often, 海拔 Pro or 沧县市民通?

海拔 Pro ships an update monthly, and 沧县市民通 every 9 days. Most recently, 海拔 Pro was updated on October 3, 2026 and 沧县市民通 on October 5, 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.*