# RC Pit Calc Pro vs CastleLink2

The clearest difference is rating: CastleLink2 at 5.0 against RC Pit Calc Pro's 4.4. CastleLink2 also leads on in-app purchases (none vs 3). RC Pit Calc Pro's advantage is update cadence (every 5 days vs monthly) and ratings volume (24 vs 2). On price, ads and device support there is nothing between them.

Both are free to download. RC Pit Calc Pro sells 3 one-off in-app purchases. CastleLink2 asks for nothing beyond the download.

CastleLink2 holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: RC Pit Calc Pro has 24 ratings behind it against 2, so its average is the more settled of the two.

RC Pit Calc Pro ships an update every 5 days, CastleLink2 monthly. The most recent releases landed on September 23, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | RC Pit Calc Pro | CastleLink2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (24 ratings)](https://appshunter.io/ios/app/rc-pit-calc-pro/id1562268871/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/castlelink2/id6743709203/reviews)** |
| Number of ratings | **24** | 2 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 58 MB | 35 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Degree3, Inc.](https://appshunter.io/developer/1497876563) | [Castle Creations Inc](https://appshunter.io/developer/1377811229) |

## What reviewers say

### RC Pit Calc Pro

[App page](https://appshunter.io/ios/app/rc-pit-calc-pro/id1562268871)

This app offers a suite of specialized calculators for RC car enthusiasts. It helps with gear ratios, suspension geometry, corner weights, oil viscosity, fuel usage, and top speed estimations. It also stores data for multiple cars and includes helpful guides.

**Highlights:** Gear ratio calculation, Suspension geometry analysis, Corner weight balancing, Shock oil viscosity adjustment, Fuel usage and pit stop planning, Top speed estimation, Oil blending for custom viscosity

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime backer | $2.00 | one-time |
| Lifetime Backer | $4.00 | one-time |
| Lifetime Backer | $4.99 | one-time |


### CastleLink2

[App page](https://appshunter.io/ios/app/castlelink2/id6743709203)

Connect to Castle Creations ESCs and BECs via Bluetooth to adjust settings, update firmware, and view data logs. Compatible with a wide range of ESCs and BECs, supporting both B-Link hardware versions.

**Highlights:** Connect to Castle Creations ESCs/BECs, Adjust settings, Update firmware, View data logs, Supports B-Link adapters, Wide ESC/BEC compatibility

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

**In-app purchases:** none


## Frequently asked questions

### Is RC Pit Calc Pro free?

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

### Is CastleLink2 free?

CastleLink2 is free to download, with no in-app purchases.

### Which has better reviews, RC Pit Calc Pro or CastleLink2?

CastleLink2 is rated higher. RC Pit Calc Pro averages 4.4 out of 5 from 24 ratings, while CastleLink2 averages 5.0 from 2 ratings.

### Do RC Pit Calc Pro or CastleLink2 have ads?

Neither RC Pit Calc Pro nor CastleLink2 shows ads.

### Which is updated more often, RC Pit Calc Pro or CastleLink2?

RC Pit Calc Pro ships an update every 5 days, and CastleLink2 monthly. Most recently, RC Pit Calc Pro was updated on September 23, 2026 and CastleLink2 on September 8, 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.*