# Ratio Calc! — user reviews

> 64 indexed App Store user reviews of Ratio Calc! by David Mills, rated 4.50/5 from 25 ratings.

- Source: https://appshunter.io/ios/app/ratio-calc/id436311293/reviews
- App overview in markdown: https://appshunter.io/ios/app/ratio-calc/id436311293.md
- Rating breakdown: 5★ 21 · 4★ 0 · 3★ 1 · 2★ 2 · 1★ 1

## Newest reviews (14 of 64)

### 4/5 — Nicht ganz Aktuell

*2022-03-30*

Während der neueste Tamiya TA08 aufgeführt ist, fehlt das aktuelle Flaggschiff TRF420…
Ansonsten eine gute Idee

### 4/5 — Great app needs one small addition

*2021-05-16*

Love the app, but would be amazing with either iCloud backup or an import export feature to something as simple as JSON. If it had this I would happily give it 5 stars

### 5/5 — Fabulous App!!

*2016-01-05*

Excellent app with great database of cars. I manage to find all my cars (15) of them with ease. I was after internal drive ratios which are all there including substitute settings if required. Very happy with the app.

### 5/5 — Super 👍👍👍

*2015-12-08*

Alles funktioniert super und es werden auch immer mehr Autos hinzugefügt ist also immer auch dem neusten stand vorbildlich 😎

### 5/5 — Top

*2015-10-30*

Super App, sehr umfangreiche Fahrzeugdatenbank. Sehr schönes Design, gut angepasst für verschiedene iOS Geräte.

### 5/5 — Very Useful

*2015-10-07*

This app is about as good as it gets. Very functional, without any silliness or distractions. I use it every time I race or tune.

### 5/5 — Thumbs up!!

*2015-09-20*

Great app for on the track setups, it's an absolute must for the average to the pro racer!!!

### 5/5 — App for real racers

*2015-09-07*

I wouldn't leave home without it. Gone are all my charts, calipers and notes. Good job guys!

### 5/5 — Great simple app

*2015-05-29*

Does exactly what you need it to do; quickly figure out gear ratios and rollout. Saves your individual cars and their settings. Buy this app for gearing, you won't be disappointed.

### 5/5 — Excellent App

*2015-05-28*

Great app for RC gear ratios. A must have.

### 5/5 — Awesome! Easy!

*2015-02-28, version 5.10*

!

### 5/5 — Ratio Calc

*2015-01-12*

Excellent app in all respects a must have for any racer

### 5/5 — Brilliant

*2014-11-12*

Great app does exactly what it says

### 5/5 — Great !!!

*2014-07-15, version 5.03*

You've done a great job with this app !

## Most critical reviews (10 lowest-rated)

### 1/5 — Ratio/tyre sizes

*2026-02-22*

Still unable to adjust tyre sizes and gear ratio. Was excellent before the last update. Shame.

**Developer response:** Help me out please, and get in contact so I can try to understand the problem: https://sllim-code.com/contact-us/ Tyre size is definitely adjustable so I’m a little confused. Thanks!

### 1/5 — Update 7.0 keine Verbesserung!

*2024-11-27*

Liebe Entwickler,
letztes Update ist 5 Jahre her, ich kann den Drang zu aktualisieren verstehen. Jedoch war die RatioCalc App in ihrer vorherigen Version (6.6) sehr gut und übersichtlicher gestaltet als die jetzt gebrachte Version 7.0. Insbesondere die Darstellung als auch Bedienung waren deutlicher abzulesen. Die Übersetzungstabelle z.B. farblich abgesetzt. Einer der meißten genutzten Apps auf meinem Smartphone. Leider kann ich die Version 6.6 nicht mehr laden, schade. Ein perfekter Fall laufende Systeme einfach mal laufen zu lassen. So wie sie jetzt ist fliegt sie aus meinem Smartphone.

**Developer response:** Thanks for the feedback, I believe all of the major issues have now been addressed in the latest update (v7.3).

### 1/5 — No Mod 1 pinions or spurs..

*2012-08-13*

Hi mate, nice app and it looks great, but no calls for Mod 1? 

Let me know when fixed and I will rate it 5. No good for sc 4x4 trucks like the DESC410r.

Cheers

### 1/5 — kein modul 1

*2012-05-02*

ich hab einen 1:8 e-buggy.....ritzel und hz , eie in diesem maßstab übluch, modul 1.
somit frag ich mich wofür ich gerade mein geld zum fenster hinaus gewirfen habe. 

die ekektriwekt besteht nicht nur aus 1:10ern und 32, 48 und 64dp 😌

nice try, aber glatt vorbei. 

am liebsten keinen stern

### 2/5 — Version 7.0 not fit for purpose

*2024-11-26*

Used this app for years but latest version will not let you change tyre diameters so pretty much useless

**Developer response:** I’ve improved tyre diameter entry now and I believe all of the major issues have now been addressed in the latest update (v7.3).

### 3/5 — Ratio Calc

*2021-04-10*

App needs to be updated!

**Developer response:** Can you elaborate please? The database of cars is updated regularly - if there’s one missing then drop us an email and we’ll do our best to add it.

### 3/5 — Update

*2014-03-02*

Don't like the update

### 3/5 — Nice App

*2013-02-03, version 4.60*

Great App.

### 4/5 — Update question

*2024-11-26*

was happy to see that you have updated the Ratio Calc app! I’ve been using it for years and am glad to see it’s still being supported. However, I was disappointed to see that you removed the notes feature and the ability to save the same vehicle twice. For example, I often have two 1/12 scale cars—one with a 17.5 rollout and another with a 21.5 rollout.

Will these features be coming back in future updates?

**Developer response:** Thank you. I appreciate the scenario of saving the same car twice isn’t currently possible. The app has had to undergo a full rewrite so some features didn’t make the first cut. I’m currently looking at how best to re-implement the full saving feature currently missing, and hope to have it back soon.

### 4/5 — Modelle

*2023-08-11*

Hallo, bitte bei Xray den TW X4 einpflegen

## Most praised reviews (10 highest-rated)

### 5/5 — Best roll-out calc out there

*2024-12-08*

Keep it up !!!!!! Your last updated totally made my day.

**Developer response:** Thank you!  🙏

### 5/5 — Please create this for android

*2024-02-21, version 6.6*

I have the app for iphone but I've recently switched to android and would love to use this on my new phone for my rc racing.

### 5/5 — Great App - needs an update though

*2022-10-19*

Not a major issue as plenty of cars have not actually changed their internal ratio, but many will look and wonder where there car is….!

### 5/5 — Génial

*2021-05-29*

Un outil top pour tous les possesseurs de voiture RC!

### 5/5 — Neue Modelle ?

*2020-09-16*

App ist soweit in Ordnung nur 1-2 mehr modelle wären noch ganz nett z.B. Xpress Gripxero D1 oder Deantech D9 Bulldog, Fijon fj9 usw. 

Ansonsten top arbeit jungs! 👌

### 5/5 — Perfect!

*2017-04-15*

Well done! I love the amount of cars you have in the library. Great tool!

### 5/5 — Awesome App! MUST HAVE!

*2017-03-03*

I've had this app since the beginning pretty much and have seen the growth the developer has added. This has been invaluable for me at the track and in the backyard!

### 5/5 — Ratio Calc

*2016-05-10, version 6.1*

Best gear ratio app, hands down!

### 5/5 — Simple, clean, perfect!

*2016-02-24*

In a sea of mish-mashed, garbage R/C related apps, this is an aesthetic oasis. It does exactly what you downloaded it for and doesn't give you a migraine in the process. What more do you want? Hmm. Maybe a watch app? Oh yeah, the dude made that too. Excellent work.

### 5/5 — My go to gear ratio app

*2016-02-08*

Been using this app for years. A must have. They add new cars very quick.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-02.*