Planetary Gear Calculator
Planetary Gear Calculator is made and published by Heng Jia Liang. AppBrain is an independent app data site and isn't affiliated with Heng Jia Liang. The app name, icon, screenshots and description belong to Heng Jia Liang and are shown as published on the App Store.
AppBrain's verdict
- Rating on App Store
- 4.67
- 6 ratings
- Last updated
- January 23, 2026
- Size
- 768.0 KB
It doesn't have enough ratings yet to judge what users think.
User feedback
Ratings and reviews on the App StoreComments on Planetary Gear Calculator for iOS
We don't have enough comments to show example comments. Please check back later.
Store listing
By Heng Jia Liang, from the App Store
Description by Heng Jia Liang Written by the developer, not by AppBrain. Click to read.
Plus quickly simulate how the Planetary Gears works on the fly.
This is a great tool, especially for DIYer who want to design their own Planetary Gears System quick and easy.
Preview how these systems work before 3D print own planetary gear system.
Formula for Planetary gear systems:
Sun Teeth = ringTeeth - 2 * planetTeeth
Planet Teeth = (ringTeeth - sunTeeth) / 2
Ring Teeth = sunTeeth + 2 * planetTeeth
ST = sunTeeth
PT = planetTeeth
RT = ringTeeth
SunSpeed = (ST+RT)/ST * PlanetCarrierSpeed - RT/ST * RingSpeed
PlanetCarrierSpeed = RT/(ST+RT) * RingSpeed + ST/(ST+RT) * SunSpeed
RingSpeed = (ST+RT)/RT * PlanetCarrierSpeed - ST/RT * SunSpeed
Planetary gear systems, also known as epicyclic gear systems, are important components in modern engineering.
Planetary gear systems are useful for speed variation and commonly found from automatic car transmissions and industrial food mixers to operating tables and solar arrays.
There are four core components that make up the planetary gear systems, the ring gear, the sun gear and the planetary gears connected to the carrier.
Thanks for your support and do visit nitrio.com for more apps for your iOS devices.
Safety and technology
Found in the app by AppBrain- Price
- $3.99
- App size
- 768.0 KB
- Content rating
- Everyone
Technologies used by Planetary Gear Calculator
Releases
Updates seen on the App Store- Version
- 1.1
- Launched
- April 2022
No changelog data
Alternatives
Similar apps and more from Heng Jia LiangAlternatives to Planetary Gear Calculator
More from Heng Jia Liang
Rankings
App Store top chartsApp Store Rankings for Planetary Gear Calculator
About the app and developer
About Planetary Gear Calculator
Planetary Gear Calculator is a productivity app developed by Heng Jia Liang.
User Ratings
Planetary Gear Calculator is rated 4.67 out of 5 stars. The rating is based on 6 ratings.
App Information
Planetary Gear Calculator costs $3.99. The app size is 768.00 kB. The latest version available is 1.1. The last update was on January 23, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since April 2022.
Developer information for Heng Jia Liang
Address:
Frequently asked questions about Planetary Gear Calculator
Is Planetary Gear Calculator free?
No. Planetary Gear Calculator costs $3.99 on the App Store.
Is Planetary Gear Calculator still available?
Yes. Planetary Gear Calculator is on the App Store, and the last update we saw was on January 23, 2026.
How large is Planetary Gear Calculator?
Planetary Gear Calculator is 768.00 kB.
Is Planetary Gear Calculator suitable for children?
App Store rates the content of Planetary Gear Calculator as suitable for everyone.
How do people rate Planetary Gear Calculator?
Planetary Gear Calculator scores 4.67 out of 5 stars, from 6 ratings on the App Store.
Who made Planetary Gear Calculator?
Planetary Gear Calculator was developed by Heng Jia Liang. It is listed in the productivity category on the App Store.
What are the best alternatives to Planetary Gear Calculator?
People looking at Planetary Gear Calculator also look at these productivity apps: Gear Speed and Tire Size, A-Projects, Arduino Manager, iPocket Draw, 2Quip.