I don’t see an on/off input type (preferably presenting a slider in the UI) to enable or disable my app (it’s an after-hours alarm).
What sort of clever workarounds are folks using to provide Boolean input?
Is there a way to set a default value for an input?
Yes, you can use a boolean input and it provides an On/Off slider (at least in iOS it does; I imagine it does similar in the Android / Windows Phone apps)
input “appEnabled”, type: “bool”, title: “ON=Enabled, OFF=Disabled”, required: true, defaultValue: true
Then, where needed in your code:
if (settings.appEnabled) {
// App is enabled, do these things
} else {
// App is disabled, don’t do anything
}
Whoa! Looks like you found some old docs that I wasn’t even aware of. 
Those docs are outdated. I’ll track down the source and get that cleaned up.
Here are the current docs that are updated fairly regularly: http://docs.smartthings.com
And the section on preferences (you can use a ‘boolean’ input type): http://docs.smartthings.com/en/latest/smartapp-developers-guide/preferences-and-settings.html
How/where did you find those docs, BTW? :
Someone whose handle is DanLieberman posted them to GitHub 9 months ago. If that was a copyright violation, you can have them taken down.
https://github.com/danlieberman/rtdTest/tree/master/smartapp-developers-guide
This would actually be a great feature within the iOS and Android app itself (or at a minimum in the IDE). I would love the ability to enable/disable apps or devices temporarily for troubleshooting or other reasons.
(Did I read this thread correctly? 
)
Thanks @JDRoberts. I tracked it down and we’ll get it corrected (no copyright violation or anything, just an apparent old test docs location that never got cleaned up)