# AI英語添削くん 正しい英文に添削推敲 vs Focus Train

The clearest difference is in-app purchases: AI英語添削くん 正しい英文に添削推敲 at none against Focus Train's 5. Focus Train's advantage is ads (none vs shown) and update cadence (every 5 days vs every 4 months). On price and iOS requirement there is nothing between them.

Both are free to download. Focus Train sells 5 in-app purchases, starting at $1.99 per 7 days. AI英語添削くん 正しい英文に添削推敲 asks for nothing beyond the download.

AI英語添削くん 正しい英文に添削推敲 ships an update every 4 months, Focus Train every 5 days. The most recent releases landed on September 21, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | AI英語添削くん 正しい英文に添削推敲 | Focus Train |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/focus-train-pomodoro-timer/id6774918673/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 8 MB | 28 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [kaitekidigital Inc.](https://appshunter.io/developer/1305009205) | [帅 陈](https://appshunter.io/developer/1655624601) |

## What reviewers say

### AI英語添削くん 正しい英文に添削推敲

[App page](https://appshunter.io/ios/app/ai/id6737055247)

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

**In-app purchases:** none


### Focus Train

[App page](https://appshunter.io/ios/app/focus-train-pomodoro-timer/id6774918673)

This app transforms focus sessions into engaging train journeys. Stay concentrated to travel farther, collect trip stamps, and unlock new routes. It offers a visually appealing and rewarding alternative to traditional timers.

**Highlights:** Gamified focus sessions with train journeys, Collect trip stamps and unlock new routes, Live Ticket on Lock Screen, One-tap widget for instant boarding, Customizable themes and train colors, Baggage blocking for distraction management, Native iOS design with haptics and Live Activities

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FocusTrain Premium Weekly | $1.99 | per 7 days |
| FocusTrain Premium Monthly | $3.99 | per month |
| FocusTrain Premium Yearly | $14.99 | per year |
| FocusTrain Premium Lifetime | $19.99 | one-time |
| FocusTrain Premium | $24.99 | one-time |


## Frequently asked questions

### Is AI英語添削くん 正しい英文に添削推敲 free?

AI英語添削くん 正しい英文に添削推敲 is free to download, with no in-app purchases.

### Is Focus Train free?

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

### Do AI英語添削くん 正しい英文に添削推敲 or Focus Train have ads?

AI英語添削くん 正しい英文に添削推敲 shows ads; Focus Train does not.

### Which is updated more often, AI英語添削くん 正しい英文に添削推敲 or Focus Train?

AI英語添削くん 正しい英文に添削推敲 ships an update every 4 months, and Focus Train every 5 days. Most recently, AI英語添削くん 正しい英文に添削推敲 was updated on September 21, 2026 and Focus Train on September 18, 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.*