# English Core vs シャドーイング Shadog

The clearest difference is update cadence: シャドーイング Shadog at every 11 days against English Core's every 5 weeks. シャドーイング Shadog also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. English Core sells 10 in-app purchases, starting at $2.99 per month and シャドーイング Shadog sells 3 in-app purchases, starting at $22.99 per month. Whichever you choose, the download price is not the number that matters.

English Core ships an update every 5 weeks, シャドーイング Shadog every 11 days. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | English Core | シャドーイング Shadog |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 70.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 11 days** |
| Monetization | — | Free with in-app purchases |
| Size | 132 MB | 75 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [CORE & INITIALS Co., Ltd.](https://appshunter.io/developer/1219310161) | [Shadog LLC](https://appshunter.io/developer/1685605147) |

## What reviewers say

### English Core

[App page](https://appshunter.io/ios/app/english-core/id6443809306)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CORE月間プラン | $2.99 | per month |
| VTX Andrew Foy年間プラン | $2.99 | per year |
| VTX ぺちたん校長(Alisa)年間プラン | $2.99 | per year |
| VTX ToriPeebs年間プラン | $2.99 | per year |
| VTX Cちゃん年間プラン | $2.99 | per year |
| VTX Alexandria年間プラン | $2.99 | per year |
| VTX Dylan年間プラン | $2.99 | per year |
| VTX Delice年間プラン | $2.99 | per year |
| VTX Laila & Lily年間プラン | $2.99 | per year |
| CORE年間プラン | $34.99 | per year |


### シャドーイング Shadog

[App page](https://appshunter.io/ios/app/shadog/id6448691638)

Enhance your English listening skills with AI-powered shadowing. Get instant pronunciation feedback, identify weak spots, and practice with a vast library of materials. Achieve your language goals with personalized, daily practice.

**Highlights:** AI pronunciation feedback, Shadowing practice, Personalized learning paths, Extensive material library (500+ questions), Progress tracking, Daily practice reminders, Weakness-focused script generation

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shadog | $22.99 | per month |
| Shadog 3ヶ月プラン | $59.99 | per 3 months |
| Shadog 1年プラン | $149.99 | per year |


## Frequently asked questions

### Is English Core free?

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

### Is シャドーイング Shadog free?

シャドーイング Shadog is free to download, with in-app purchases available.

### Do English Core or シャドーイング Shadog have ads?

Neither English Core nor シャドーイング Shadog shows ads.

### Which is updated more often, English Core or シャドーイング Shadog?

English Core ships an update every 5 weeks, and シャドーイング Shadog every 11 days. Most recently, English Core was updated on October 27, 2026 and シャドーイング Shadog on October 30, 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.*