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Free in every app
$0
Open GasLogic, DuctLogic, or NoteLogic and use the free Apprentice tier. Upgrade inside that app only if you need more.
Open GasLogicPricing
Free calculator in the app. Suite pass if you want everything.
We do not sell GasLogic or DuctLogic as standalone products on this site. Open the app, use Apprentice, and buy Journeyman or Foreman from inside that tool when you need it.
This website sells one master plan only. Individual app upgrades (GasLogic Journeyman / Foreman, and the same pattern on other apps) are sold inside each app, not here.
All apps
BTU Engineer Master
$19.99/ mo
One subscription unlocks every current and future BTU Engineer app on this site.
- • GasLogic, DuctLogic, and NoteLogic included
- • Future calculators included as they ship
- • Same Peak Eleven account everywhere
Shops
Team / Enterprise
Custom
Multi-seat licenses for a shop manager. Per-app seats stay inside each calculator.
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