# ISD Go vs RC Speed Calculator Pro

The clearest difference is review sentiment: RC Speed Calculator Pro at 100% against ISD Go's 19%. RC Speed Calculator Pro also leads on rating (4.9 vs 1.8). ISD Go's advantage is device support (4 vs 2) and iOS requirement (11.0 vs 17.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

RC Speed Calculator Pro holds the better App Store score, 4.9 against 1.8. Both are backed by a comparable volume of ratings — 31 and 23 respectively. Written reviews point the same way: 19% of ISD Go's written reviews are positive against 100% of RC Speed Calculator Pro's.

ISD Go ships an update weekly, RC Speed Calculator Pro fortnightly. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | ISD Go | RC Speed Calculator Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.8 (31 ratings)](https://appshunter.io/ios/app/isd-go/id1447072980/reviews) | **[4.9 (23 ratings)](https://appshunter.io/ios/app/rc-speed-calculator-pro/id6445860835/reviews)** |
| Number of ratings | **31** | 23 |
| Positive reviews | 18.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Free | Free |
| Size | 26 MB | 160 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [深圳艾斯特创新科技有限公司](https://appshunter.io/developer/1405370693) | [Degree3, Inc.](https://appshunter.io/developer/1497876563) |

## What reviewers say

### ISD Go

[App page](https://appshunter.io/ios/app/isd-go/id1447072980)

Control and manage wireless smart devices with a user-friendly interface. Connect and operate devices via Bluetooth, and receive automatic firmware updates when new versions are available.

**Highlights:** Connect BLE smart devices, Wireless device operation, Automatic firmware detection, Firmware upgrades, User-friendly interface

**In-app purchases:** none

**What reviewers like**

- 👍 Easy firmware updates (sometimes)
- 👍 Practical app interface
- 👍 Works for some users
- 👍 Good hardware functionality (without app)

**What reviewers complain about**

- 🐛 Frequent connection drops (Bluetooth)
- 🐛 Firmware update failures
- 🐛 Device not detected
- 🐛 App crashes
- 🐛 Inaccurate readings/settings

**Reported bugs**

- App crashes during updates
- Device not recognized by app
- Abnormal network connection for firmware server
- App not updated for current iOS
- Bluetooth not reconnecting

**Requested features**

- Update app for current iOS
- Fix firmware update issues
- Improve Bluetooth connection stability
- Allow discharging to lower voltages (e.g., 0.0V)
- Increase discharge current options


### RC Speed Calculator Pro

[App page](https://appshunter.io/ios/app/rc-speed-calculator-pro/id6445860835)

Estimate your RC car's top speed by inputting details about its gearing, motor, and batteries. Record your estimates and actual speeds to compare different setups.

**Highlights:** Estimate RC car top speed, Input gearing, motor, and battery info, Record speed estimates, Log actual top speeds, Compare different car setups, Pre-filled car data

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

**In-app purchases:** none


## Frequently asked questions

### Is ISD Go free?

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

### Is RC Speed Calculator Pro free?

RC Speed Calculator Pro is free to download, with no in-app purchases.

### Which has better reviews, ISD Go or RC Speed Calculator Pro?

RC Speed Calculator Pro is rated higher. ISD Go averages 1.8 out of 5 from 31 ratings, while RC Speed Calculator Pro averages 4.9 from 23 ratings.

### Do ISD Go or RC Speed Calculator Pro have ads?

Neither ISD Go nor RC Speed Calculator Pro shows ads.

### Which is updated more often, ISD Go or RC Speed Calculator Pro?

ISD Go ships an update weekly, and RC Speed Calculator Pro fortnightly. Most recently, ISD Go was updated on October 24, 2026 and RC Speed Calculator Pro on October 22, 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.*