Comparison

ISD Go vs RC Pit Calc Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ISD Go

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
Read full description

ISD GO is an APP specially used to connect Aster wireless smart devices, so as to provide users with a more convenient and user-friendly user interface to operate Aster's smart devices. We have added the following features in ISD GO: 1. Bind Esther BLE (Bluetooth Low Energy) smart device Users can bind Aster Bluetooth smart devices with their mobile phones, so that they can wirelessly access and operate the devices through their mobile phones. 2. Firmware upgrade When a new device firmware is released on the official website of Esther, ISD GO will automatically detect it, so as to realize the firmware upgrade of the smart device.

About

RC Pit Calc Pro

This app provides a comprehensive suite of calculators for RC car enthusiasts, covering gear ratios, suspension geometry, shock tuning, and more. It helps racers and bashers optimize their vehicle's performance with precise calculations and real-world data.

Highlights
  • Gear ratio and FDR calculation
  • Pinion and top speed recommendation
  • Suspension geometry calculator
  • Shock oil temperature and blending
  • Fuel usage calculator
  • Corner weight analysis
Features
Read full description

The RC gear ratio calculator trusted by racers and bashers — plus every other calculator you need at the track, in one free app. GEAR RATIO CALCULATOR Calculate gear ratio, final drive ratio (FDR), and rollout from your pinion and spur. Enter your gears "before and after" to see the real impact of gear and tire changes as a percentage (e.g. +2.5%), so you know exactly how much speed and motor load to expect. Built-in transmission data for hundreds of popular RC cars. PINION RECOMMENDER Not sure which pinion to run? Pick your car, enter your motor, and get a starting pinion from how racers in your class actually gear, plus the range they run. Built from real race setups across hundreds of classes. TOP SPEED CALCULATOR For electric cars with brushless motors: enter basic info about your setup and get a solid estimate of your car's top speed. PILL INSERT / SUSPENSION GEOMETRY CALCULATOR Find your toe, anti-squat, kick-up, roll center, and track width. Supports all popular cars that use pill inserts, and works with custom suspension mounts. CORNER WEIGHT CALCULATOR Enter your car's corner weights and get the full breakdown: front-rear, left-right, and cross weight/wedge. SHOCK OIL TEMP & VISCOSITY CALCULATOR Racing on a hotter or colder day than usual? See exactly what shock oil to run to keep the same car feel. OIL BLENDING CALCULATOR Don't have the right shock oil with you? Blend the thick and thin oils you already own — this calculator gives you the exact proportions for your target viscosity. SHOCK DAMPING CALCULATOR Compare two piston and oil combinations before you build the shock: roll damping, bump pack and jump pack side by side. Supports tapered pistons and dual hole sizes, with presets for common 1/10 and 1/8 shocks plus custom sizes. FUEL USAGE CALCULATOR For nitro racers: fuel burn per minute in race conditions, how much you need to finish long mains, and how many pit stops to plan. FEATURES - Remembers your entries for each car - Built-in data (spur gear, transmission ratio) for hundreds of popular cars - Walkthroughs and detailed help for every calculator FROM SO DIALED Want tuning help beyond the math? Our RC Setup App gives you pro setup sheets for 600+ cars, race logging, and an AI mechanic — find "RC Setup App" on the App Store.

Screenshots

ISD Go3 screens
RC Pit Calc Pro4 screens

Verdict

The call

The clearest difference is rating: RC Pit Calc Pro at 4.4 against ISD Go's 1.8. RC Pit Calc Pro also leads on review sentiment (60% vs 19%). ISD Go's advantage is in-app purchases (none vs 2) and iOS requirement (11.0 vs 15.0). On price, ratings volume, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. RC Pit Calc Pro sells 1 one-off in-app purchase. ISD Go asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

RC Pit Calc Pro holds the better App Store score, 4.4 against 1.8. Both are backed by a comparable volume of ratings — 31 and 25 respectively. Written reviews point the same way: 19% of ISD Go's written reviews are positive against 60% of RC Pit Calc Pro's.

UpkeepUpdate frequency

ISD Go ships an update weekly, RC Pit Calc Pro every 4 days. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
ISD Go versus RC Pit Calc Pro: the parameters behind the verdict, then further details
ParameterISD GoRC Pit Calc Pro
PriceFreeFree
Rating1.8 (31 ratings)4.4 (25 ratings) — better
Positive reviews18.5% of reviews60.0% of reviews — better
Number of ratings31 — better25
Update frequencyWeeklyEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size26 MB59 MB
Age rating4+4+
Developer深圳艾斯特创新科技有限公司Degree3, Inc.

Customer experience

ISD Go

All ratings30 ratings
Positive16.7%
Neutral3.3%
Negative80.0%
Written reviews81 reviews
Positive18.5%
Neutral13.6%
Negative67.9%

RC Pit Calc Pro

All ratings25 ratings
Positive88.0%
Neutral0.0%
Negative12.0%
Written reviews10 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

Bugs and requests

ISD Go

Reported bugs

56 issues
  • App crashes during updates
  • Device not recognized by app
  • Abnormal network connection for firmware server
  • App not updated for current iOS
  • Bluetooth not reconnecting
Show 51 more
  • Inaccurate current readings
  • Device disconnected during update
  • No device detected
  • App corrupts N series chargers
  • Batteries showing incorrect discharge status
  • Unable to bind to FD-200
  • Bluetooth will not connect
  • Computer doesn't recognize charger
  • App fails to download firmware
  • Drag brake not engaging
  • ESC not staying connected via Bluetooth
  • Timeout messages
  • CM1620: inaccurate battery/power display, cut-off info
  • A8 Air not seen via USB or Bluetooth
  • Unstable firmware update connection
  • FD200: impossible to discharge below 3.0V, limited current options, preset conflicts
  • N16 recognized as N8
  • App shows 'Waiting for device'
  • Bluetooth drops all the time
  • Does not work on iOS 16.5
  • Shows wrong device (N8 instead of 16N)
  • Firmware version mismatch
  • K4 locked on 'UPDATE' screen
  • FD-200 disconnects during discharge
  • FD-200 keeps discharging regardless of parameters
  • App disconnects and won't reconnect
  • FD200 Bluetooth disconnects all the time
  • CM1620: unstable Bluetooth, incorrect charge level display
  • App does not stay connected via Bluetooth
  • ESC70: times out, loses connection, resets to factory settings
  • FD-200 drops Bluetooth signal
  • Bluetooth dropping constantly
  • App loses connection to FD200
  • H605 Air error code
  • New version doesn't work with H605
  • App crashes constantly
  • App does not remember cut off voltage
  • App loses binding to device
  • Fails to connect to FD-200
  • Difficulty re-establishing BT connection
  • K4 won't connect
  • Cannot connect to FD-200
  • Bluetooth connection problem
  • App doesn't find FD-200
  • Bluetooth connection with iPad not working
  • Cannot connect with iPad or Android
  • H605 Air overvolts battery packs
  • Incapable of balance charge
  • Font size too big on iPhone SE
  • Cell voltage not displayed correctly after update
  • Manual calibration doesn't work

Requested features

13 requests
  • 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
Show 8 more
  • Fix preset conflicts
  • Improve drag brake settings
  • Add dark mode
  • Add balance charge option
  • Improve font size for smaller screens
  • Allow landscape mode on iPad
  • Add charge volume in %
  • Add alarm for charged battery

RC Pit Calc Pro

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

ISD Go

No in-app purchases

1 purchases

RC Pit Calc Pro

One-time1
  • Lifetime Backer2 variants$4.99

Questions

Is ISD Go free?
ISD Go is free to download, with no in-app purchases.
Is RC Pit Calc Pro free?
RC Pit Calc Pro is free to download, with in-app purchases available.
Which has better reviews, ISD Go or RC Pit Calc Pro?
RC Pit Calc Pro is rated higher. ISD Go averages 1.8 out of 5 from 31 ratings, while RC Pit Calc Pro averages 4.4 from 25 ratings.
Do ISD Go or RC Pit Calc Pro have ads?
Neither ISD Go nor RC Pit Calc Pro shows ads.
Which is updated more often, ISD Go or RC Pit Calc Pro?
ISD Go ships an update weekly, and RC Pit Calc Pro every 4 days. Most recently, ISD Go was updated on October 24, 2026 and RC Pit Calc Pro on October 30, 2026.

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