About this app
This is designed as a pocket reference for undergraduate electrical engineering. It includes theories, solvers, and examples for fundamental EE courses listed as follows: + circuits, + digital, + power systems, and fields. There is also a reference section that provides a refresher in math and units as applied to electrical engineering. Emphasis is placed on basic circuit theory such as: + impedance, + magnitude, + phase angle, + series circuits, + parallel circuits, etc. Even though this is intended for the undergrad EE student, this also provides a quick reference for the engineers, hobbyists, scientists, or just enthusiasts of circuits. If your like this app, please check out our other stickers and apps by searching under Sigma Sky, LLC in the Apple app store. No in-app purchase. No ads. No subscriptions. Accessible offline.
Latest release
What’s New
Thank you for using this app. This version contains the required iOS update, deprecation fixes, and performance improvements.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 17, 2026 · 10:54 PM Free
Screenshots
