Detector Activation is a utility for quickly estimating the activation time for heat and smoke detectors as well as sprinklers.

The calculation method used in the application is based on the method and DETACT-T2 code presented in "Methods to Calculate the Response Time of Heat and Smoke Detectors Installed Below Large Unobstructed Ceilings" by David D. Evans and David W. Stroup, published by the National Bureau of Standards in 1985.

What’s New

Version 3.0

Updated for iOS 13.

Ratings and Reviews

1.0 out of 5
1 Rating

1 Rating

Jowilliamsnz ,

Unconservative = unsafe.

I've compared the results with two other calculators (one commercial, the other a spreadsheet based on the identical theory) and this one under-predicts detector response - by as much as 10% (15 seconds). The other two agree to the second. I wouldn't recommend this as it errs on the wrong side of the right answer.

App Privacy

The developer, Kristoffer Hermansson, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer's privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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