# J vs Morse Learn

The clearest difference is ads: J at none against Morse Learn's shown. J also leads on monetization model (free vs ad-supported). Morse Learn's advantage is update cadence (every 2 months vs every 13 months) and review sentiment (44% vs 33%). 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.

J ships an update every 13 months, Morse Learn every 2 months. The most recent releases landed on September 10, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | J | Morse Learn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/morse-learn/id1521664435/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 33.3% of reviews | **44.4% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Every 2 months** |
| Monetization | **Free** | Ad-supported |
| Size | 9 MB | 7 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [National Research Institute for Earth Science and Disaster Prevention](https://appshunter.io/developer/427125457) | [koji kamogawa](https://appshunter.io/developer/1488210713) |

## What reviewers say

### J

[App page](https://appshunter.io/ios/app/j-shis/id517160013)

This app provides official earthquake hazard maps for Japan, allowing users to view predictions of ground shaking intensity. It offers detailed information based on location and displays fault lines and seismic activity models.

**Highlights:** View national earthquake hazard maps, Zoom, pan, and adjust map transparency, Display probabilistic seismic hazard maps, Show surface and deep ground maps, View earthquake source fault locations, Display seismic activity models, Show location-specific earthquake probabilities

**Features:** Vision Pro support

**In-app purchases:** none


### Morse Learn

[App page](https://appshunter.io/ios/app/morse-learn/id1521664435)

Learn Morse code through guided steps and practice listening with random generation. Customize volume, playback speed, and tone, with added features like reverb and noise simulation for realistic training.

**Highlights:** Step-by-step Morse code learning, Random Morse code generation for practice, Adjustable volume, playback speed, and tone, Reverb and noise simulation, High-speed sound training adjustment, Endless generation function

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is J free?

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

### Is Morse Learn free?

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

### Do J or Morse Learn have ads?

Morse Learn shows ads; J does not.

### Which is updated more often, J or Morse Learn?

J ships an update every 13 months, and Morse Learn every 2 months. Most recently, J was updated on September 10, 2026 and Morse Learn on September 8, 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.*