# Train Drill — Couple Trains, Learn Math

> Couple Trains, Learn Math (iPhone/iPad app by Kuromoji LLC.)

- Source: https://appshunter.io/ios/app/train-drill/id6778407957 (this page in markdown: same URL + `.md`)
- Developer: [Kuromoji LLC](https://appshunter.io/developer/6772408096)
- Category: Education, Games
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.1 · 34 MB
- Languages: American English, Japanese
- Released: 2026-06-11
- Data updated: 2026-09-22
- User reviews in markdown: https://appshunter.io/ios/app/train-drill/id6778407957/reviews.md

## What is Train Drill?

Learn addition and subtraction through train coupling and uncoupling.

Two trains couple with a satisfying "clunk!" — how many cars in all?
Cars uncouple from the consist — how many are left?

The coupling and uncoupling animations turn numbers into something you can see and count, so arithmetic sinks in through play.

■ Features
- Adventure map with 9 routes: forest, mountains, sea, and the stars
- Clear every addition route to unlock Subtraction mode
- Train collection: stainless, two-tone liveries, and special cars
- Special showcase: Shinkansen, steam locomotive, and a luxury cruise train
- Rank up as you answer: Trainee -> Local -> Express -> Limited Express -> Shinkansen Driver
- Parents' dashboard: weekly play counts and tricky problems
- Built-in daily limits (Free: 3 stages/day)
- No ads, all data stays on the device

■ Plans
- Free: 3 stages/day
- Mini: 10 stages/day + Subtraction mode
- Unlimited: unlimited + Subtraction mode

■ Terms & Privacy
- Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
- Privacy Policy: https://kuromojilabs.github.io/traindrill-site/privacy.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Unlimited | $1.99 | per month |
| Mini | $0.99 | per month |



## Version history (last 2 releases)

### 2.0.0 — 2026-08-03

A big v2.0 update!
- All-new landscape-first design
- New Subtraction mode
- Japanese / English support
- Renamed to Train Drill

### 1.0 — 2026-06-11

No release notes.

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## More apps by Kuromoji LLC

- [2048 Japan](https://appshunter.io/ios/app/2048-japan/id6789882382)
- [Ukiyo-e Puzzle](https://appshunter.io/ios/app/ukiyo-e-puzzle/id6789886340)
- [Omikuji Fortune](https://appshunter.io/ios/app/omikuji-fortune/id6789886990)
- [保育士試験対策クイズ - 一問一答で覚える重要用語](https://appshunter.io/ios/app/id6796954608)

All apps by Kuromoji LLC: https://appshunter.io/developer/6772408096

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-22.*