# Rollout Calculator vs RC Pit Spec

The clearest difference is in-app purchases: Rollout Calculator at none against RC Pit Spec's 4. RC Pit Spec's advantage is update cadence (every 2 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. RC Pit Spec sells 4 in-app purchases, starting at $2.99 per month. Rollout Calculator asks for nothing beyond the download.

Rollout Calculator ships an update every 2 months, RC Pit Spec every 2 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Rollout Calculator | RC Pit Spec |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (11 ratings)](https://appshunter.io/ios/app/rollout-calculator-rc-dd-car/id6451037467/reviews)** | — |
| Number of ratings | **11** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Ad-supported | — |
| Size | 8 MB | 122 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takao Ichimura](https://appshunter.io/developer/1474061593) | [KG APP LAB](https://appshunter.io/developer/1492655525) |

## What reviewers say

### Rollout Calculator

[App page](https://appshunter.io/ios/app/rollout-calculator-rc-dd-car/id6451037467)

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.

**Highlights:** Rollout distance calculation, Three display tables, Pinion and spur gear selection, Tire diameter input, Pitch setting

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### RC Pit Spec

[App page](https://appshunter.io/ios/app/rc-pit-spec-setup-and-lap-timer/id6761605402)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic (Monthly) | $2.99 | per month |
| Pro (Monthly) | $9.99 | per month |
| Basic (Yearly) | $29.99 | per year |
| Pro (Yearly) | $99.99 | per year |


## Frequently asked questions

### Is Rollout Calculator free?

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

### Is RC Pit Spec free?

RC Pit Spec is free to download, with in-app purchases available.

### Do Rollout Calculator or RC Pit Spec have ads?

Both Rollout Calculator and RC Pit Spec show ads.

### Which is updated more often, Rollout Calculator or RC Pit Spec?

Rollout Calculator ships an update every 2 months, and RC Pit Spec every 2 days. Most recently, Rollout Calculator was updated on November 3, 2026 and RC Pit Spec on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*