# 速習英単語 vs Stackd

The clearest difference is in-app purchases: 速習英単語 at none against Stackd's 1. 速習英単語 also leads on update cadence (daily vs fortnightly) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Stackd sells 1 one-off in-app purchase. 速習英単語 asks for nothing beyond the download.

速習英単語 ships an update daily, Stackd fortnightly. The most recent releases landed on August 16, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | 速習英単語 | Stackd |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Fortnightly |
| Monetization | Free | — |
| Size | 31 MB | 3 MB |
| Requires iOS | **15.0** | 18 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [StudyPeaks](https://appshunter.io/developer/901134689) | [Nene Nakagawa](https://appshunter.io/developer/1821103094) |

## What reviewers say

### 速習英単語

[App page](https://appshunter.io/ios/app/id6581484543)

Master essential vocabulary for the Common Test with this app. It efficiently teaches 2140 frequently appearing English words, offering audio, example sentences, and targeted review of words you find difficult. Ideal for students aiming to improve their English scores.

**Highlights:** Learn 2140 essential vocabulary words, Focus on Common Test frequent words, Efficient and fast memorization, Includes audio pronunciation, Provides example sentences, Reviews only difficult words

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

**In-app purchases:** none


### Stackd

[App page](https://appshunter.io/ios/app/stackd-study-timer-and-tracker/id6761293821)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stackd Pro | $1.99 | one-time |


## Frequently asked questions

### Is 速習英単語 free?

速習英単語 is free to download, with no in-app purchases.

### Is Stackd free?

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

### Do 速習英単語 or Stackd have ads?

Neither 速習英単語 nor Stackd shows ads.

### Which is updated more often, 速習英単語 or Stackd?

速習英単語 ships an update daily, and Stackd fortnightly. Most recently, 速習英単語 was updated on August 16, 2026 and Stackd on September 14, 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.*