Comparison

TriFAn vs OTOTETSU

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

★ 4.719 ratingsView app →

About

TriFAn

Enhance your train simulation experience with a realistic electronic timetable display. This add-on requires the "Zusi 3" train simulator to function.

Highlights

Electronic Timetable Display (ETD) simulation
EBuLa functionality
Add-on for Zusi 3
Realistic modern locomotive gauge

Features

Read full description

This app is an add-on for the german train simulator "Zusi 3". It simulates a certain gauge of modern locomotives: the Electronic Timetable Display ETD (EBuLa in german). In order to use this app properly you will need the train simulator "Zusi". "Zusi" is not part of this app!

About

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.

Highlights

Simulates electric train acceleration/deceleration sounds
Generates waveforms from inverters
Simulates motor sounds
Design imaginary train sounds
Customize torque and rotational speed effects

Features

Read full description

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.

Screenshots

OTOTETSU4 screens

Verdict

The call

The clearest difference is update cadence: TriFAn at fortnightly against OTOTETSU's every 2 months. TriFAn also leads on iOS requirement (9.3 vs 15.0). OTOTETSU's advantage is device support (3 vs 1). On price, review sentiment, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

TriFAn ships an update fortnightly, OTOTETSU every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard3 real differences · 7 level

TriFAn versus OTOTETSU: the parameters behind the verdict, then further details
Parameter	TriFAn	OTOTETSU
Price	Free	Free
Rating	—	4.7 (19 ratings) — better
Positive reviews	100.0% of reviews — better	93.1% of reviews
Number of ratings	—	19 — better
Update frequency	Fortnightly — better	Every 2 months
Ads	No	No
In-app purchases	No	No
Monetization	Free	Free
Devices	iPad	iPhone, iPad, iPod — better
Requires iOS	9.3 — better	15.0
Further details — not scored
Size	6 MB	20 MB
Age rating	4+	4+
Developer	Holger Maass	Hisato Takeuchi

Customer experience

TriFAn

Written reviews5 reviews

Positive100.0%

Neutral0.0%

Negative0.0%

OTOTETSU

All ratings17 ratings

Positive94.1%

Neutral5.9%

Negative0.0%

Written reviews58 reviews

Positive93.1%

Neutral3.4%

Negative3.4%

In-app purchases

None

TriFAn

No in-app purchases

None

OTOTETSU

No in-app purchases

Questions

Is TriFAn free?

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

Is OTOTETSU free?

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

Do TriFAn or OTOTETSU have ads?

Neither TriFAn nor OTOTETSU shows ads.

Which is updated more often, TriFAn or OTOTETSU?

TriFAn ships an update fortnightly, and OTOTETSU every 2 months. Most recently, TriFAn was updated on November 2, 2026 and OTOTETSU on November 3, 2026.