# 關鍵英單：進階字彙4401 vs TutorABC

The clearest difference is price: TutorABC at Free against 關鍵英單：進階字彙4401's $7.99. TutorABC also leads on update cadence (every 9 days vs every 31 months). 關鍵英單：進階字彙4401's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 16.0). On review sentiment, ads and device support there is nothing between them.

TutorABC is free to download; 關鍵英單：進階字彙4401 costs $7.99 up front. TutorABC sells 2 one-off in-app purchases. 關鍵英單：進階字彙4401 asks for nothing beyond the download.

關鍵英單：進階字彙4401 ships an update every 31 months, TutorABC every 9 days. The most recent releases landed on September 27, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | 關鍵英單：進階字彙4401 | TutorABC |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | — | **[3.8 (4 ratings)](https://appshunter.io/ios/app/tutorabc/id6448898280/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 9 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 286 MB | 290 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Soyong Corporation](https://appshunter.io/developer/339142397) | [TutorABC](https://appshunter.io/developer/503066904) |

## What reviewers say

### 關鍵英單：進階字彙4401

[App page](https://appshunter.io/ios/app/4401-7000/id1190075855)

This app uses spaced repetition and scientific memory theories to help users efficiently memorize advanced English vocabulary. It offers structured learning modules, diverse practice exercises, and progress tracking to build a strong vocabulary foundation for academic success.

**Highlights:** Spaced repetition learning system, Advanced vocabulary sets (4401-7000), Thematic and unit-based organization, Root, prefix, and suffix analysis, Diverse and practical example sentences, Listening and spelling practice, Progress tracking and achievements

**In-app purchases:** none


### TutorABC

[App page](https://appshunter.io/ios/app/tutorabc/id6448898280)

Enhance your English and Chinese language skills with flexible, on-the-go learning. Practice listening and speaking through live classes, themed video lessons, and interactive sessions with foreign teachers.

**Highlights:** 24/7 flexible class booking, Daily updated live auditorium, Real-time interaction with foreign teachers, Themed video lessons, Practice listening and speaking, Support for English and Chinese

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TutorABC Master Class | $24.99 | one-time |
| TutorABC 1 on 1 Session | $99.99 | one-time |


## Frequently asked questions

### Is 關鍵英單：進階字彙4401 free?

關鍵英單：進階字彙4401 costs $7.99, with no in-app purchases.

### Is TutorABC free?

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

### Do 關鍵英單：進階字彙4401 or TutorABC have ads?

Neither 關鍵英單：進階字彙4401 nor TutorABC shows ads.

### Which is updated more often, 關鍵英單：進階字彙4401 or TutorABC?

關鍵英單：進階字彙4401 ships an update every 31 months, and TutorABC every 9 days. Most recently, 關鍵英單：進階字彙4401 was updated on September 27, 2026 and TutorABC on September 24, 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.*