The current duration setting for inching is way too little, only an hour til device turns itself off. A swimming pool motor pump would require at least 2 hours to run til it turns itself off. kindly add this in newer Sonoff app. Thanks 
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Were you considered using scence to achieve the goals?
The delay of the scene can reach 6 hours
For most Sonoff devices, you can set a schedule to define times to switch it on and off. That’s what I use for my pool pump.
I agree with this limitation - if it can measure in hours, why not up to 24 hours? why not include days?
use case for me - is the pool pump… sometimes the garden service switches it on at the button… which is fine - but then I don’t want it to run more than 3hr
it seems silly to have all these different ways of dealing with come constraints - why not just standardise on hours, minutes, seconds, and always account for 24 hour…
why must the users find strange workarounds for something that should be dead simple… 
I have tried to achieve this
By creating a scene
If device is on
Delay 2 hours
Power off device.
But ewelink doesn’t allow me to have the same device both in the IF condition and in the THEN action
Hello, starting the same device can be bypassed by using a manual scene that replaces, for example, only turning off the device used in IF.
Otherwise, it is possible to use the scene, but there is a problem with Delay. If I set Inching for e.g. 5 hours, then if I turn the device off and on again after an hour, Inching will start running again for 5 hours, whereas in the scene with the scene being turned on, the Delay only counts from the first time the scene is turned on, if I were to start the scene again in an hour , the countdown ends anyway in 4 hours and not in 5 hours, as I expected, and there is no way to end the scene with Delay, only to wait, which is a problem with a long time. An option would be to somehow end the countdown on an already running scene in the APP so that it ends and then start the scene again. However, eWeLink would have to somehow figure out how to end the countdown for a scene started in this way.
I have done the scene technique.
It works fine except one issue
If i turn the device on from the button or from the
ewelink app it triggered the scene and the delay works.
The problem is that i am using a webhook to turn it on.
Apparently it i turn it on using a webhook, the scene isn’t triggered.
I assume i can solve this by having the webhook
Trigger a separate scene that contains the delay inside.
I don’t use webhook, so unfortunately I don’t know.
I wrote about it on the forum many times… here is one example. What you are looking for is dynamic stop/start time counting control. eWeLink, of course, does not provide this.
Of course, I would not call it “Inching” under any circumstances, because my solution requires access to the Internet, while the “Inching” function in Sonoff devices works locally and will work without access to the cloud.