Ratio Calc!

Name: Ratio Calc!
Rating: 4.55556 (18 reviews)

Sports

View in App Store

Ratio Calc!

Sports

4.6

18 ratings

Age Rating

Seller

David Mills

In-App Purchases

$0.99 – $9.99

View in App Store

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User Reviews for Ratio Calc!

Perfect!

this app is great, everything you need it to do. The car database is amazing, its so easy to get more cars added you just email in app and days later they add it. In app updates is another major plus!

Jdmpurest, Oct 24, 2011

Perfect!

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

Korelick, Apr 15, 2017

Ratio Calc

App needs to be updated!

nazzy5x, Apr 10, 2021

Nice

Great app for finding FDR. Has a bug on ipad at moment where I cannot hit "done", it does not appear on screen, after setting pinion and spur size, so cannot get out of this mode. Otherwise it does everything we need for finding gear ratios on our RC cars. Thanks for making this app. :-)

smoothi, Feb 23, 2013

This app is great!!

This app will be a big help at the track. I would say that anyone that races and that has an iPhone should get this app

Spacyracer, Dec 26, 2011

Fantastic!!

Great place to keep notes and gearing for all your cars. Enough models for every occasion!!! Store multiple cars and compare final drive ratios or roll out for accurate records. Will definitely save money on spent motors and speed controls due to over gearing.

Speed2Burm, Jul 04, 2013

Nice app but needs more

Great app and excellent user interface. This is almost a killer must have app. It needs input for battery used and motor specs, then you can calculate speed base on output. You already have rollout, just missing a few pieces.

stickman89, Nov 06, 2012

Time saver

This app allows quick and easy calculations to be made at the track when you need that little extra to beat the competition.

Subversive Coma, Jun 25, 2012

Simple, clean, perfect!

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.

SwanyDelight, Feb 24, 2016

Great simple app

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.

Wesley Raven, May 29, 2015

Description

Ratio Calc is a quick and easy tool for radio control car racers to use trackside. Knowing your final drive ratio (FDR) is very useful for comparison with other racers to determine if your car is geared correctly. You can also view your favourite information on Apple Watch.

It lets you quickly select your car by filtering on manufacturer and model. Select your pinion and spur size and the FDR is displayed. Tyre diameter can also be entered to calculate your rollout. Ratio and roll out charts are also available which plot pinion and spur gear combinations to create very handy reference tables. - Save your favourite cars for quick access - Save notes and track name against your favourite cars - Share ratio/rollout charts - Download new cars from within the app - Select measurement units (imperial/metric) - Select your preferred gear pitch, alternative ratios in other pitches will be shown - Over 1600 cars/variants in the database