# Simple Wordbook vs PomoTrain

The clearest difference is in-app purchases: Simple Wordbook at none against PomoTrain's 4. Simple Wordbook also leads on iOS requirement (14.1 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PomoTrain sells 4 in-app purchases, starting at $3.99 per month. Simple Wordbook asks for nothing beyond the download.

Simple Wordbook ships an update every 5 days, PomoTrain every 4 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Simple Wordbook | PomoTrain |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 4 days** |
| Monetization | — | Freemium |
| Size | 1 MB | 303 MB |
| Requires iOS | **14.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [eventcast inc.](https://appshunter.io/developer/1572595480) | [Tatsuya Kawauchi](https://appshunter.io/developer/1716320513) |

## What reviewers say

### Simple Wordbook

[App page](https://appshunter.io/ios/app/simple-wordbook/id1572595478)

**Features:** Vision Pro support

**In-app purchases:** none


### PomoTrain

[App page](https://appshunter.io/ios/app/pomotrain/id6759304993)

Enhance your focus with a unique timer that blends the Pomodoro Technique with a virtual train journey across Japan. Complete focus sessions to advance through real railway routes, explore stations with Street View during breaks, and enjoy immersive ambient sounds. Gamified elements like collecting stamps and bento boxes keep you motivated.

**Highlights:** Virtual Japanese railway routes, Pomodoro Technique timer, Station exploration with Street View, Immersive ambient sounds, Collect station stamps and bento boxes, Daily focus logs and streak tracking

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Montyly | $3.99 | per month |
| Pro Yearly | $11.99 | per year |
| Pro Lifetime 24 | $14.99 | one-time |
| Pro Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is Simple Wordbook free?

Simple Wordbook is free to download, with no in-app purchases.

### Is PomoTrain free?

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

### Do Simple Wordbook or PomoTrain have ads?

Neither Simple Wordbook nor PomoTrain shows ads.

### Which is updated more often, Simple Wordbook or PomoTrain?

Simple Wordbook ships an update every 5 days, and PomoTrain every 4 days. Most recently, Simple Wordbook was updated on November 3, 2026 and PomoTrain on November 5, 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.*