4.2
Introducing Saved Calculations, allowing you to pick up a calculation where you left it last. When in a calculator or reference tool, simply tap the 'Save as Note' button, create a new note or select an existing one and click save. Anytime you need to return to your Saved Calculation, just return to the note and tap the card at the bottom.

Also new in this release:
- added custom wire sizes to pipe fill (for BAS wires and multi conductor cables)
- fixed bug that could cause voltage drop results to be off
- changed grid view so cards take up two spaces when there's available space
- new user onboarding flow

4.1
We're excited to introduce code of the day notifications! Choose the days you'd like to receive notifications, the time and keep your code knowledge fresh!

Also new in this update:
- more new codes
- new onboarding flow for new users
- bug fixes and performance improvements

4.0
Introducing version 4, featuring Apple's all new Liquid Glass design. The entire app has been redesigned with the new Liquid Glass elements in iOS 26. New sliders, toggles and menus dynamically react to the content underneath. Plus a refreshed Liquid Glass app icon.

Also new in this release:
- new pipe fill calculator mode that allows you to use multiple insulation types in the same pipe with wire derating built in
- code references make finding where we get our info from in the code book even easier
- localization for French Canadian
- bug fixes and performance improvements