In version 6.0, you can customize when results are displayed via preferences: "Lost Focus" (recalculate when moving fields), "Change" (recalculate after every key press), or "Use Calculate" (manual button). Caution regarding third-party "free full" downloads:
Using unlicensed software in professional projects is a major liability risk. In version 6
If the app crashes on launch, install vcredist_x86.exe (Visual C++ Redistributable 2013) and .NET Framework 4.8. Reboot and run as Admin. In version 6.0
If you are currently using Version 5.0 or an older release, here is why upgrading to is critical: "Change" (recalculate after every key press)
mobile alternative for iPhone and iPad. It allows for quick field calculations using a subset of the most common fittings (approximately 14) from the ASHRAE Handbook. Full Mobile App