# 长龙航空 vs Realtime Altimeter Pro

The clearest difference is price: 长龙航空 at Free against Realtime Altimeter Pro's $1.99. 长龙航空 also leads on ads (none vs shown) and update cadence (every 2 months vs every 22 months). Realtime Altimeter Pro's advantage is rating (5.0 vs 3.0) and review sentiment (68% vs 57%). On in-app purchases and device support there is nothing between them.

长龙航空 is free to download; Realtime Altimeter Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Realtime Altimeter Pro holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 8 respectively. Written reviews point the same way: 57% of 长龙航空's written reviews are positive against 68% of Realtime Altimeter Pro's.

长龙航空 ships an update every 2 months, Realtime Altimeter Pro every 22 months. The most recent releases landed on November 11, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | 长龙航空 | Realtime Altimeter Pro |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/id1048828178/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/realtime-altimeter-pro/id6736500613/reviews)** |
| Number of ratings | 2 | **8** |
| Positive reviews | 57.4% of reviews | **68.2% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 22 months |
| Monetization | — | Paid |
| Size | 57 MB | 2 MB |
| Requires iOS | **9.0** | 13 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [浙江长龙航空有限公司](https://appshunter.io/developer/1048828177) | [Zhenlai Xia](https://appshunter.io/developer/1435731218) |

## What reviewers say

### 长龙航空

[App page](https://appshunter.io/ios/app/id1048828178)

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

**In-app purchases:** none


### Realtime Altimeter Pro

[App page](https://appshunter.io/ios/app/realtime-altimeter-pro/id6736500613)

Track your real-time altitude, speed, and direction without needing a network connection. Capture photos with embedded altitude and GPS data to document your journeys. Includes a free compass and barometer.

**Highlights:** Offline altitude tracking, Real-time compass, Velocimeter for speed measurement, Barometer, Watermark camera with GPS data, No ads

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

**In-app purchases:** none


## Frequently asked questions

### Is 长龙航空 free?

长龙航空 is free to download, with no in-app purchases.

### Is Realtime Altimeter Pro free?

Realtime Altimeter Pro costs $1.99, with no in-app purchases.

### Which has better reviews, 长龙航空 or Realtime Altimeter Pro?

Realtime Altimeter Pro is rated higher. 长龙航空 averages 3.0 out of 5 from 2 ratings, while Realtime Altimeter Pro averages 5.0 from 8 ratings.

### Do 长龙航空 or Realtime Altimeter Pro have ads?

Realtime Altimeter Pro shows ads; 长龙航空 does not.

### Which is updated more often, 长龙航空 or Realtime Altimeter Pro?

长龙航空 ships an update every 2 months, and Realtime Altimeter Pro every 22 months. Most recently, 长龙航空 was updated on November 11, 2026 and Realtime Altimeter Pro on November 8, 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.*