# Light Pie — Simple Lighting Calculations > Tool for fundamental lighting calculations with worked examples and theory. (iPhone/iPad app by Pork Pie Software Limited.) - Source: https://appshunter.io/ios/app/light-pie/id1478487326 (this page in markdown: same URL + `.md`) - Developer: [Pork Pie Software Limited](https://appshunter.io/developer/1086416605) - Category: Productivity, Education - Price: $3.99 - Rating: 2.33/5 from 3 App Store ratings - Age rating: 4+ - Requires: iOS 12.0 · 10 MB - Languages: English - Released: 2019-09-22 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/light-pie/id1478487326/reviews.md ## What is Light Pie? Lighting 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. Light Pie is written to allow you to undertake fundamental lighting calculations with ease. The following three features are available within the App: Foot-candle Lux: Upon entering an illuminance level in either Lux or Foot-candles this feature converts the provided value into its corresponding Lux or Foot-candle value. Installation Lifetime: Upon entering the luminaire or lamp life together with the installation’s annual operating hours this feature will calculate the installations lifespan, i.e. the time from new until either relamping or new luminaires are required. Lumen Method: Upon entering the required illuminance, room area, average luminous flux of the lamp, luminaire utilisation factor, and luminaire maintenance factor, this feature calculates the number of luminaires needed to achieve the required illuminance. Room Index: Upon entering the room length, room width, and the luminaries height above the working plane, this feature calculates the Room Index (K). Maintenance FactorRoom Index: Upon entering the Lamp Lumens Maintenance Factor (LLMF), the Lamp Survival Factor (LSF), Luminaire Maintenance Factor (LMF), and Room Surface Maintenance Factor (RSMF), this feature calculates the lighting installation Maintenance Factor (MF). “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 - Illuminance conversion (Lux/Foot-candle) - Installation lifespan calculation - Luminaire quantity calculation - Room Index calculation - Maintenance Factor calculation ## Frequently asked questions about Light Pie ### What is Light Pie? Light Pie is a paid application designed for engineers to perform fundamental lighting calculations. It provides the underlying math and theory behind these calculations, along with worked examples, to help users understand how results are derived. ### What types of lighting calculations can Light Pie perform? Light Pie can perform illuminance conversions between Lux and Foot-candles, calculate installation lifespan based on luminaire life and operating hours, determine the number of luminaires required using the Lumen Method, and calculate Room Index and Maintenance Factor. ### How does Light Pie help users understand calculations? Unlike apps that just provide answers, Light Pie includes the underlying maths and theory for each calculation. This approach allows users to understand the derivation of the results, not just obtain them. ### What is the price of Light Pie? Light Pie is a paid app priced at $3.99. This one-time purchase grants access to all its lighting calculation features. ### On which devices can I use Light Pie? Light Pie is supported on iPhones and iPods. It was released on September 22, 2019, and its latest version is 2.1, last updated on October 25, 2020. ### Is Light Pie suitable for beginners? While written by engineers for engineers, the app's focus on explaining the underlying math and theory can be beneficial for those learning about lighting calculations. However, it assumes a certain level of technical understanding. ### How often is Light Pie updated? The developer, Pork Pie Software, states that they can quickly update and improve their apps based on user feedback. The app was last updated on October 25, 2020, to version 2.1. ### What is the user rating for Light Pie? Light Pie has a rating of 2.3 stars from 3 ratings. This suggests a mixed reception from its current user base. ## Version history (last 1 release) ### 2.1 — 2020-10-25 Thanks for using our Light Pie app. We’re constantly improving this app in conjunction with your feedback to make this app even better. This update includes: • Updated the Installation Lifetime feature to allow a user configured operating hours profile to be created. The profile is based upon entering your building or applications actual daily operating hours. If you like the app, please leave us a review! “Written by Engineers for Engineers” ## Apps similar to Light Pie | App | Rating | Price | Category | | --- | --- | --- | --- | | [AI Chatbot with Сhat - Chatrun](https://appshunter.io/ios/app/ai-chatbot-with-hat-chatrun/id6446992925) | 4.7 (13,943) | Free | Productivity | | [Pollie: Create Polls](https://appshunter.io/ios/app/pollie-create-polls/id1502100385) | 4.9 (2,133) | Free | Productivity | | [AI ChatBot Assistant: AskEasy](https://appshunter.io/ios/app/ai-chatbot-assistant-askeasy/id6447290444) | 4.7 (30,278) | Free | Productivity | | [Electronics Engineer Helper](https://appshunter.io/ios/app/electronics-engineer-helper/id896429646) | 4.8 (427) | Free | Productivity | | [3D Дизайн Кухни](https://appshunter.io/ios/app/3d/id1164246190) | 4.4 (554) | Free | Productivity | | [Test Hunter - Cancellations UK](https://appshunter.io/ios/app/test-hunter-cancellations-uk/id1467331705) | 4.6 (97) | Free | Productivity | ## 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.*