# MEGA地震予測 vs Osushi

The clearest difference is in-app purchases: Osushi at none against MEGA地震予測's 2. Osushi also leads on update cadence (every 6 days vs every 3 months). MEGA地震予測's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. MEGA地震予測 sells 2 in-app purchases, starting at $2.99 per month. Osushi asks for nothing beyond the download.

MEGA地震予測 ships an update every 3 months, Osushi every 6 days. The most recent releases landed on October 22, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | MEGA地震予測 | Osushi |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 10.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 days** |
| Monetization | Subscription | — |
| Size | 42 MB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [JESEA](https://appshunter.io/developer/1252972114) | [Kaito Muraoka](https://appshunter.io/developer/1596462135) |

## What reviewers say

### MEGA地震予測

[App page](https://appshunter.io/ios/app/mega/id1252972115)

This app provides earthquake predictions based on a unique surveying approach. It analyzes data from nationwide electronic reference points and private observation points to detect precursor phenomena. Predictions are visualized by area and updated weekly.

**Highlights:** PUSH notifications for updates, Graph display of electronic reference point fluctuations, Area-specific earthquake predictions, Access to past articles and predictions, Weekly forecast delivery

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MEGA地震予測 | $2.99 | per month |
| MEGA地震予測 | $19.99 | per month |


### Osushi

[App page](https://appshunter.io/ios/app/osushi/id6480398872)

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

**In-app purchases:** none


## Frequently asked questions

### Is MEGA地震予測 free?

MEGA地震予測 is free to download, with in-app purchases available.

### Is Osushi free?

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

### Do MEGA地震予測 or Osushi have ads?

Neither MEGA地震予測 nor Osushi shows ads.

### Which is updated more often, MEGA地震予測 or Osushi?

MEGA地震予測 ships an update every 3 months, and Osushi every 6 days. Most recently, MEGA地震予測 was updated on October 22, 2026 and Osushi on October 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*