# Skyline Drone 無人機 vs OORA Train

The clearest difference is iOS requirement: OORA Train at 13.0 against Skyline Drone 無人機's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Skyline Drone 無人機 ships an update every 2 months, OORA Train every 6 weeks. The most recent releases landed on October 10, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Skyline Drone 無人機 | OORA Train |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | — | Free |
| Size | 408 MB | 134 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Jon-Chao Hong](https://appshunter.io/developer/547495524) | [Yoshinn CO., LTD.](https://appshunter.io/developer/1856072122) |

## What reviewers say

### Skyline Drone 無人機

[App page](https://appshunter.io/ios/app/skyline-drone/id6759943191)

**In-app purchases:** none


### OORA Train

[App page](https://appshunter.io/ios/app/oora-train/id6784865377)

Learn Japanese by listening to real train announcements and station information from across Japan. Features synchronized subtitles, word-by-word highlighting, and pronunciation practice tools.

**Highlights:** Real train announcements, Synchronized subtitles, Word-by-word highlighting, Pronunciation practice, Station and route information, Curated announcement lessons

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

**In-app purchases:** none


## Frequently asked questions

### Is Skyline Drone 無人機 free?

Skyline Drone 無人機 is free to download, with no in-app purchases.

### Is OORA Train free?

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

### Do Skyline Drone 無人機 or OORA Train have ads?

Neither Skyline Drone 無人機 nor OORA Train shows ads.

### Which is updated more often, Skyline Drone 無人機 or OORA Train?

Skyline Drone 無人機 ships an update every 2 months, and OORA Train every 6 weeks. Most recently, Skyline Drone 無人機 was updated on October 10, 2026 and OORA Train on October 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.*