# 高中英文基本單字 vs 空中家教

The clearest difference is in-app purchases: 高中英文基本單字 at none against 空中家教's 1. 空中家教's advantage is update cadence (every 3 weeks vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 空中家教 sells 1 in-app purchase, starting at $59.99 per month. 高中英文基本單字 asks for nothing beyond the download.

高中英文基本單字 ships an update every 4 months, 空中家教 every 3 weeks. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 高中英文基本單字 | 空中家教 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Size | 4 MB | 34 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chi-Cheng Liao](https://appshunter.io/developer/1053803113) | [空中美語](https://appshunter.io/developer/1373172419) |

## What reviewers say

### 高中英文基本單字

[App page](https://appshunter.io/ios/app/id1173737097)

**Features:** macOS Compatibility

**In-app purchases:** none


### 空中家教

[App page](https://appshunter.io/ios/app/id6477124116)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 空中家教學習+ | $59.99 | per month |


## Frequently asked questions

### Is 高中英文基本單字 free?

高中英文基本單字 is free to download, with no in-app purchases.

### Is 空中家教 free?

空中家教 is free to download, with in-app purchases available.

### Do 高中英文基本單字 or 空中家教 have ads?

Neither 高中英文基本單字 nor 空中家教 shows ads.

### Which is updated more often, 高中英文基本單字 or 空中家教?

高中英文基本單字 ships an update every 4 months, and 空中家教 every 3 weeks. Most recently, 高中英文基本單字 was updated on October 26, 2026 and 空中家教 on October 27, 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.*