# Motor Pie — Motor Calculations made easy! > AC electric motor calculation tools with theory and worked examples. (iPhone/iPad app by Pork Pie Software Limited.) - Source: https://appshunter.io/ios/app/motor-pie/id1227411774 (this page in markdown: same URL + `.md`) - Developer: [Pork Pie Software Limited](https://appshunter.io/developer/1086416605) - Category: Education, Productivity - Price: $3.99 - Rating: 4.40/5 from 9 App Store ratings - Age rating: 4+ - Requires: iOS 13.0 · 2 MB - Languages: American English - Released: 2019-01-09 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/motor-pie/id1227411774/reviews.md ## What is Motor Pie? Motor calculations made easy! As with all our apps this app provides the underlying maths and theory behind the calculations together with worked examples. This will allow you to not just get an answer, but more more importantly to understand how the answer was derived. This app is written to allow you to undertake ac electric motor calculations with ease. The following two features are available within the app: Mechanical: This feature provides the following four tools: Speed RPM: Upon entering a motor’s supply frequency, number of poles, and percentage slip if applicable, the motor’s synchronous speed and slip speed in RPM is calculated. Output Power: Upon entering a motor’s phase or line voltage, current, power factor, and efficiency the the motor’s mechanical output power in kW and horsepower HP is calculated. Torque: Upon entering a motor’s shaft power and shaft speed the motor’s torque in Nm and foot-pounds (lbf⋅ft) is calculated. Speed Rads/s: Upon entering a motor’s shaft speed the motor’s angular speed in Radians per second is calculated. Horse Power to kW Converter: Upon entering a Horse Power output power, the app calculates the corresponding kWm output power. By toggling the input value the reverse can also be calculated. Electrical: This feature provides the following two tools: Full Load Current: Upon entering a motor’s mechanical power rating together with its phase or line voltage, power factor, and efficiency the motor’s full load current current (Amps) is calculated. Input Power: Upon entering a motor’s mechanical power rating together with its power factor and efficiency the motor’s electrical input power in kW and kVA is calculated. “Written by Engineers for Engineers” About Pork Pie Software: Pork Pie Software is a mobile app development company based in New Zealand. Our apps are actually written and coded by real engineers that practice in the engineering area that each app is written in. All feedback and suggestions are genuinely welcome. As we write our own apps we can quickly update and improve our apps based on your feedback. Find out more at: http://www.porkpiesoftware.com Contact us by Email: contact@porkpiesoftware.com Like us on Facebook: https://www.facebook.com/PorkPieSoftware Follow us on Twitter: https://twitter.com/PorkPieSoftware Watch us on Youtube: https://www.youtube.com/c/PorkpiesoftwareKiwi ## Key features - AC electric motor calculations - Mechanical and electrical tools - Speed RPM calculation - Output power calculation - Torque calculation - Full load current calculation - Input power calculation ## Frequently asked questions about Motor Pie ### What AC electric motor calculations can Motor Pie perform? Motor Pie offers tools for calculating synchronous speed, slip speed, output power (kW and HP), torque (Nm and lbf⋅ft), angular speed (Radians/s), full load current, and input power (kW and kVA). ### Does Motor Pie explain the theory behind the calculations? Yes, Motor Pie provides the underlying maths and theory behind each calculation, along with worked examples, to help users understand how the results are derived. ### What devices is Motor Pie available on? Motor Pie is available on iPhone and iPod devices. ### How often is Motor Pie updated? The latest version, 1.7.2, was released on November 22, 2020. Pork Pie Software aims to update apps based on user feedback. ### What is the age rating for Motor Pie? Motor Pie has an age rating of 4+, making it suitable for a wide range of users. ### How does Motor Pie compare to other engineering calculation apps? Motor Pie is developed by practicing engineers and focuses on AC electric motor calculations, providing both answers and the theoretical understanding behind them. ### Is Motor Pie free to download? No, Motor Pie is a paid application, priced at $3.99. ### Does Motor Pie have ads? The provided data does not indicate the presence of advertisements in Motor Pie. ## Version history (last 5 releases) ### 1.7.2 — 2020-11-22 Thanks for using our Motor Pie app. We’re constantly improving this app in conjunction with your feedback to make this app even better. This update includes: • Updated the Full Load Current feature so you can now provide your motor power in both kW and Horse Power (Hp) and convert between the two. If you like the app, please leave us a review! “Written by Engineers for Engineers” ### 1.7.1 — 2020-09-12 Thanks for using our Motor Pie app. We’re constantly improving this app in conjunction with your feedback to make this app even better. This update includes: • A few minor graphics and text changes. If you like the app, please leave us a review! “Written by Engineers for Engineers” ### 1.7 — 2020-07-17 Thanks for using our Motor Pie app. We’re constantly improving this app in conjunction with your feedback to make this app even better. This update includes: • Refreshed Rads/s calculator feature to make it a RPM to Rads/s to RPM converter. • Refreshed the full load current feature to tidy the single phase to three phase feature. • Refreshed the mechanical output power feature to tidy the single phase to three phase feature. • We also gave the app a good behind the scenes tidy-up of code. If you like the app, please leave us a review! “Written by Engineers for Engineers” ### 1.6.2 — 2020-06-12 Thanks for using our Motor Pie app. We’re constantly improving this app in conjunction with your feedback to make this app even better. This update includes: - Minor fix to ensure all inputs are retained in memory. If you like the app, please leave us a review! “Written by Engineers for Engineers” ### 1.6.1 — 2020-06-10 Thanks for using our Motor Pie app. We’re constantly improving this app in conjunction with your feedback to make this app even better. This update includes: - Minor fixes to ensure memory retention works. If you like the app, please leave us a review! “Written by Engineers for Engineers” ## Apps similar to Motor Pie | App | Rating | Price | Category | | --- | --- | --- | --- | | [Circuit Calculator](https://appshunter.io/ios/app/circuit-calculator/id836792864) | — | Free | Education | | [AI Plant Identifier - Plant ID](https://appshunter.io/ios/app/ai-plant-identifier-plant-id/id1566479952) | 4.5 (645) | Free | Education | | [Yellowstone National Park](https://appshunter.io/ios/app/yellowstone-national-park/id1047797114) | 4.8 (1,950) | Free | Education | | [Microsoft Math Solver](https://appshunter.io/ios/app/microsoft-math-solver/id1483962204) | 4.9 (42,108) | Free | Education | | [CubeStation](https://appshunter.io/ios/app/cubestation/id1524781423) | 3.3 (161) | Free | Education | | [Weed identification leaf snap](https://appshunter.io/ios/app/weed-identification-leaf-snap/id1567552490) | 3.9 (101) | Free | Education | ## More apps by Pork Pie Software Limited - [Transformer Pie](https://appshunter.io/ios/app/transformer-pie/id1086416606) - [Penetration Pie](https://appshunter.io/ios/app/penetration-pie/id1108389269) - [Escalator Pie](https://appshunter.io/ios/app/escalator-pie/id1132803906) - [Lift Pie](https://appshunter.io/ios/app/lift-pie/id1192168390) - [Power Factor Pie](https://appshunter.io/ios/app/power-factor-pie/id1200023399) - [Acoustic Pie](https://appshunter.io/ios/app/acoustic-pie/id1225024561) All apps by Pork Pie Software Limited: https://appshunter.io/developer/1086416605 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*