# \[APP\]\[Pro\] Chronograph - Adds precise timer, stopwatch and transition functionality to Homey

**URL:** <https://community.homey.app/t/app-pro-chronograph-adds-precise-timer-stopwatch-and-transition-functionality-to-homey/18214>\
**Category:** Apps\
**Tags:** app, official, tools, homey-pro\
**Created:** [September 17, 2019, 5:55am UTC](https://community.homey.app/t/app-pro-chronograph-adds-precise-timer-stopwatch-and-transition-functionality-to-homey/18214 "2019-09-17T05:55:42Z")\
**Posts on this page:** 1\
**Showing post:** 835

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**Author:** ![Wim\_Post](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/wim_post/32/56793_2.png) [@Wim\_Post](https://community.homey.app/u/Wim_Post)\
**Post date:** [October 18, 2025, 9:48pm UTC](https://community.homey.app/t/app-pro-chronograph-adds-precise-timer-stopwatch-and-transition-functionality-to-homey/18214/835 "2025-10-18T21:48:42Z")

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Loose the AND ‘month is oktober’-cards and add:

WHEN

time i is 23:59

AND

End of month is today

THEN

Stop stopwatch

WHEN

stopwatch is stopped

THEN

get value of stopwatch

Write value to timeline

Wait 1s : AND ‘ventilator is on’ THEN start stopwatch

I did a simular thing but daily is this post:

> [@How to keep track of the time a device is running](https://community.homey.app/t/how-to-keep-track-of-the-time-a-device-is-running/76437/7):
>
> At midnight start a stopwatch. If the pump is off pause the stopwatch. When the pump is turned on resume the stopwatch. When the pump is turned off pause the stopwatch. One minute before midnight read out the stopwatch, post it on the timeline, wait 1 second, stop the stopwatch. (Let my ‘plafond 1’ be your pump.)

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_[View the full topic](https://community.homey.app/t/app-pro-chronograph-adds-precise-timer-stopwatch-and-transition-functionality-to-homey/18214)._