# correctPlus vs Train Clock

The clearest difference is ads: Train Clock at none against correctPlus's shown. Train Clock also leads on iOS requirement (13.0 vs 17.6). correctPlus's advantage is update cadence (every 7 months vs every 23 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

correctPlus ships an update every 7 months, Train Clock every 23 months. The most recent releases landed on July 21, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | correctPlus | Train Clock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 7 months** | Every 23 months |
| Monetization | Ad-supported | — |
| Size | 10 MB | 143 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [hiromu izuwa](https://appshunter.io/developer/599721911) | [hiroyuki uchida](https://appshunter.io/developer/669938829) |

## What reviewers say

### correctPlus

[App page](https://appshunter.io/ios/app/correctplus/id718264772)

This app provides a wide variety of sound effects for Japanese language lessons and conversation practice. It's designed to be useful for educators and learners in various fun situations beyond the classroom.

**Highlights:** Sound effects for class activities, Conversation practice sounds, Wide variety of sounds, Useful in fun situations, Designed for Japanese teachers

**Features:** macOS Compatibility

**In-app purchases:** none


### Train Clock

[App page](https://appshunter.io/ios/app/train-clock/id1097870845)

**In-app purchases:** none


## Frequently asked questions

### Is correctPlus free?

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

### Is Train Clock free?

Train Clock is free to download, with no in-app purchases.

### Do correctPlus or Train Clock have ads?

correctPlus shows ads; Train Clock does not.

### Which is updated more often, correctPlus or Train Clock?

correctPlus ships an update every 7 months, and Train Clock every 23 months. Most recently, correctPlus was updated on July 21, 2026 and Train Clock on September 11, 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.*