Fan Law Calculator allows users to input rpm, cfm, static pressure, and horsepower. Modifying one value recalculates the others. Ductulator helps size HVAC ducts by inputting shape, dimensions, air temperature, elevation, and roughness.
Create handwritten notes with custom fonts using finger . View notes on a full-screen canvas with customizable keyboard layout. Draw precisely with finger input and share notes via email or SMS.
Generate time-based one-time passwords that change every 30 seconds. Share secure verification keys via QR code. Track used codes. Function offline without internet. No registration or server sync required.
