Every iPhone needs a few good rollout calculator apps. We benchmark 225+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.
This utility app calculates the travel distance of an RC direct drive car per motor rotation. It simplifies setup by displaying results in three easy-to-read tables, allowing users to select gear teeth and tire diameter.
This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.
What We Love
📐 Versatile calculator with basic and scientific modes
📝 Useful note-taking and calculation history features
🎨 Customizable color schemes
💻 Works well on both iPad and iPhone
Room to Improve
💰 Ads can be intrusive in free version
🔒 Lack of transparency around in-app purchases
🔍 Difficulty finding and accessing premium features
What are the best rollout calculator apps for iPhone?
Rollout Calculator - RC DD car tops our rollout calculator apps ranking as of June 2026, with a 4.9-star average from 7 App Store ratings, and it's free to download.
Are there free rollout calculator apps for iPhone?
Yes — 16 of the top rollout calculator apps we rank are free to download, including Rollout Calculator - RC DD car and Rollout Calculator.
Does Rollout Calculator - RC DD car have ads or in-app purchases?
Rollout Calculator - RC DD car shows ads and has no in-app purchases, according to its App Store listing as of June 2026.
How many rollout calculator apps are on the App Store?
We track 225+ rollout calculator apps on the iOS App Store as of June 2026, ranked by rating, recency, and analysis of real user reviews.
What is Rollout Calculator?
Rollout Calculator is a utility app designed to calculate the travel distance of an RC direct drive car per motor rotation. It helps users optimize their car's setup by providing clear, table-based results.
How do I use Rollout Calculator?
You can use Rollout Calculator by selecting the number of pinion gear teeth, spur gear teeth, and tire diameter. The app then displays the calculated rollout distance in three easy-to-use tables.