# RC Pit Calc Pro vs ISD Link

The clearest difference is rating: RC Pit Calc Pro at 4.4 against ISD Link's 2.1. RC Pit Calc Pro also leads on review sentiment (60% vs 21%) and update cadence (every 5 days vs fortnightly). ISD Link's advantage is in-app purchases (none vs 4). On price, ratings volume, 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. ISD Link asks for nothing beyond the download.

RC Pit Calc Pro holds the better App Store score, 4.4 against 2.1. Both are backed by a comparable volume of ratings — 24 and 23 respectively. Written reviews point the same way: 60% of RC Pit Calc Pro's written reviews are positive against 21% of ISD Link's.

RC Pit Calc Pro ships an update every 5 days, ISD Link fortnightly. Both last shipped on October 27, 2026.

## The numbers

| Metric | RC Pit Calc Pro | ISD Link |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (24 ratings)](https://appshunter.io/ios/app/rc-pit-calc-pro/id1562268871/reviews)** | [2.1 (23 ratings)](https://appshunter.io/ios/app/isd-link/id1568620244/reviews) |
| Number of ratings | **24** | 23 |
| Positive reviews | **60.0% of reviews** | 21.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Fortnightly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 59 MB | 3 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Degree3, Inc.](https://appshunter.io/developer/1497876563) | [深圳艾斯特创新科技有限公司](https://appshunter.io/developer/1405370693) |

## 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 |


### ISD Link

[App page](https://appshunter.io/ios/app/isd-link/id1568620244)

This app allows interaction with various smart devices. It prioritizes user privacy by saving all data locally and not collecting personal information. Bluetooth is required for device scanning and connection.

**Highlights:** Smart device interaction, Local data saving, No account registration, Bluetooth connectivity, Supports numerous device models

**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 ISD Link free?

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

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

RC Pit Calc Pro is rated higher. RC Pit Calc Pro averages 4.4 out of 5 from 24 ratings, while ISD Link averages 2.1 from 23 ratings.

### Do RC Pit Calc Pro or ISD Link have ads?

Neither RC Pit Calc Pro nor ISD Link shows ads.

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

RC Pit Calc Pro ships an update every 5 days, and ISD Link fortnightly. Most recently, RC Pit Calc Pro was updated on October 27, 2026 and ISD Link on October 27, 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.*