# 改 理解を深める 核心古文単語351 vs WurdS

The clearest difference is in-app purchases: 改 理解を深める 核心古文単語351 at none against WurdS's 1. 改 理解を深める 核心古文単語351 also leads on update cadence (every 3 days vs every 10 months) and device support. On price there is nothing between them.

Both are free to download. WurdS sells 1 one-off in-app purchase. 改 理解を深める 核心古文単語351 asks for nothing beyond the download.

改 理解を深める 核心古文単語351 ships an update every 3 days, WurdS every 10 months. The most recent releases landed on September 21, 2026 and May 18, 2026 respectively.

## The numbers

| Metric | 改 理解を深める 核心古文単語351 | WurdS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Update frequency | **Every 3 days** | Every 10 months |
| Size | 22 MB | 25 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [SYOBUN SHUPPAN CO.LTD.](https://appshunter.io/developer/1224576325) | [Kouta Takahashi](https://appshunter.io/developer/1739984430) |

## What reviewers say

### 改 理解を深める 核心古文単語351

[App page](https://appshunter.io/ios/app/351/id6444208641)

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

**In-app purchases:** none


### WurdS

[App page](https://appshunter.io/ios/app/wurds/id6482990133)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| removeads | $1.99 | one-time |


## Frequently asked questions

### Is 改 理解を深める 核心古文単語351 free?

改 理解を深める 核心古文単語351 is free to download, with no in-app purchases.

### Is WurdS free?

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

### Which is updated more often, 改 理解を深める 核心古文単語351 or WurdS?

改 理解を深める 核心古文単語351 ships an update every 3 days, and WurdS every 10 months. Most recently, 改 理解を深める 核心古文単語351 was updated on September 21, 2026 and WurdS on May 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*