OTOTETSU vs 6uo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OTOTETSU
This app simulates the characteristic sounds of electric trains, generated by inverters controlling motor torque and speed. Users can design sounds for imaginary trains by manipulating waveforms and motor sounds.
- Simulates electric train acceleration/deceleration sounds
- Generates waveforms from inverters
- Simulates motor sounds
- Design imaginary train sounds
- Customize torque and rotational speed effects
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When electric trains accelerate and decelerate, we can hear some characteristic sounds, which is caused by inverters' controlling the torque and the rotational speed of the motors. This app simulates the waveforms generated by inverters and sounds coming from motors, and you can also design sounds of imaginary trains.
6uo
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Join us in shaping the future of gaming finance and innovative gaming experiences! - Earn 6uo Tokens - Manage your game assets and rewards - Share your favorite games with friends - Explore new games featuring 6uo - Chat with your gaming partners
Screenshots
Verdict
OTOTETSU and 6uo are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
OTOTETSU ships an update every 2 months, 6uo monthly. The most recent releases landed on October 22, 2026 and October 6, 2026 respectively.
| Parameter | OTOTETSU | 6uo |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (19 ratings) — better | — |
| Positive reviews | 93.1% of reviews | — |
| Number of ratings | 19 — better | — |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 20 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Hisato Takeuchi | 6uo Games |
In-app purchases
OTOTETSU
No in-app purchases
6uo
No in-app purchases
![ATOS接近放送[山手線]](https://cdn3.appshunter.io/i/Purple211/d19010e53546c58c2b003aa93f5e7dbf/AppIcon-0-0-1x_U007emarketing-0-11-0-85-220.png/640x0w.webp "ATOS接近放送[山手線]")
![ATOS接近放送[中央線]](https://cdn3.appshunter.io/i/Purple221/4996107af1896a2e5e535b631323dd51/AppIcon-0-0-1x_U007emarketing-0-8-0-85-220.png/640x0w.webp "ATOS接近放送[中央線]")
