# 航概 HangGai vs 佐安飞行3.0

The clearest difference is in-app purchases: 航概 HangGai at none against 佐安飞行3.0's 6. 佐安飞行3.0's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. 佐安飞行3.0 sells 6 one-off in-app purchases. 航概 HangGai asks for nothing beyond the download.

## The numbers

| Metric | 航概 HangGai | 佐安飞行3.0 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hanggai/id1570322898/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Monthly |
| Monetization | Free | — |
| Size | 38 MB | 36 MB |
| Requires iOS | 14.1 | **13.0** |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [安杰 熊](https://appshunter.io/developer/1567353033) | [Sichuan Zuoan Education Consulting Co., Ltd.](https://appshunter.io/developer/1736703006) |

## What reviewers say

### 航概 HangGai

[App page](https://appshunter.io/ios/app/hanggai/id1570322898)

Practice aerospace engineering concepts with a comprehensive question bank. Features include error tracking, favorite question saving, random quizzes, and a memorization mode to reinforce learning.

**Highlights:** 972 multiple-choice questions, Error tracking, Favorite question saving, Random quiz mode, Memorization mode, Consolidate learning

**In-app purchases:** none


### 佐安飞行3.0

[App page](https://appshunter.io/ios/app/30/id6749174621)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 6个航家币 | $0.99 | one-time |
| 38个航家币 | $4.99 | one-time |
| 68个航家币 | $9.99 | one-time |
| 98个航家币 | $14.99 | one-time |
| 128个航家币 | $19.99 | one-time |
| 198个航家币 | $29.99 | one-time |


## Frequently asked questions

### Is 航概 HangGai free?

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

### Is 佐安飞行3.0 free?

佐安飞行3.0 is free to download, with in-app purchases available.

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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.*