# RC-DD ROLLOUT — easy index calculation

> RC car motor exponential distance calculation based on tire diameter. (iPhone/iPad app by WILL PLANT, Y.K..)

- Source: https://appshunter.io/ios/app/rc-dd-rollout/id1630032562 (this page in markdown: same URL + `.md`)
- Developer: [WILL PLANT, Y.K.](https://appshunter.io/developer/1616085977)
- Category: Utilities, Productivity
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 13.0 · 30 MB
- Languages: English, Japanese
- Released: 2022-06-20
- Data updated: 2026-06-13
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/rc-dd-rollout/id1630032562/reviews.md

## What is RC?

This application helps you perform the exponential calculation of machines with variable sponge tire diameters like F1 and 1/12 racing cars.

* The index means the distance traveled when the motor makes one revolution.
If the index is 50, one motor revolution advances 60 mm.

Unlike the gear ratio, the value changes when the tire becomes smaller.

Shifting to low gear (high gear ratio), 
・ Fast acceleration 
・ Maximum speed does not increase 
・ The burden on the motor reduced
・ Battery load reduced and driving time extends

Shifting to high gear (low gear ratio),
・ Slow acceleration
・ Maximum speed increases
・ The burden on the motor increased
・ Battery load increased and driving time decreases

Please note that there are recommended gear ratios from the manufacturers of the motor and ESC.
Feel free to make use of it for your RC life!

## Key features

- Exponential calculation for RC car motors
- Variable sponge tire diameter support
- Index calculation for motor revolutions
- Gear ratio impact analysis
- Motor and battery load optimization
- Recommended gear ratio guidance


## Frequently asked questions about RC

### What is the index calculation in RC-DD ROLLOUT?

The index calculation in RC-DD ROLLOUT represents the distance a machine travels for one motor revolution. For example, an index of 50 means one motor revolution advances the car 60 mm.

### How does RC-DD ROLLOUT help with gear ratios?

RC-DD ROLLOUT helps you understand how shifting to low or high gear ratios affects acceleration, maximum speed, motor burden, and battery life, allowing for informed tuning decisions.

### Does RC-DD ROLLOUT have ads?

Yes, RC-DD ROLLOUT contains advertisements. This allows the app to remain free for users to access its calculation features.

### What devices is RC-DD ROLLOUT compatible with?

RC-DD ROLLOUT is compatible with iPhone, iPad, and iPod devices. It is designed for iOS users.

### When was RC-DD ROLLOUT last updated?

RC-DD ROLLOUT was last updated on June 28, 2022, with version 1.0.1. This indicates recent maintenance and potential bug fixes.

### What is the age rating for RC-DD ROLLOUT?

RC-DD ROLLOUT has an age rating of 4+. This means it is suitable for children aged 4 and older, with no mature content.

### Is RC-DD ROLLOUT free to use?

Yes, RC-DD ROLLOUT is available for free. Users can download and utilize its features without any upfront cost.

### What is the developer of RC-DD ROLLOUT?

RC-DD ROLLOUT is developed by WILL PLANT, Y.K. They are responsible for the creation and maintenance of this utility application.

## Version history (last 2 releases)

### 1.0.1 — 2022-06-28

[update]
Updated the list of tire sizes.

### 1.0 — 2022-06-20

No release notes.

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## More apps by WILL PLANT, Y.K.

- [RC-CAMBER](https://appshunter.io/ios/app/rc-camber/id1616085975)
- [RC-GEAR](https://appshunter.io/ios/app/rc-gear/id1618154073)
- [RC-RECORD](https://appshunter.io/ios/app/rc-record/id1632582465)
- [YOKOICHI APP](https://appshunter.io/ios/app/yokoichi-app/id6444240513)

All apps by WILL PLANT, Y.K.: https://appshunter.io/developer/1616085977

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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 2026-06-13.*