UPDATE 10/7/2015: This app now allows you to specify independent slave switches for the redundant “on” and “off” presses.
A WORD ABOUT DIMMERS: I recommend using this app with pure on/off switches and NOT dimmers. Due to the nature of dimmer switches, this app may have the following unexpected behavior: Turning the master switch “off” from “on” may result in toggling your slave switches/lights (because Dimmers send redundant events). Additionally, dimming your lights to “0” via an app may also result in the toggle being triggered. This is because the dim to 0 is interpreted as “off” and sent as a physical event. As of right now, there is no elegant way for me to handle these situations, but I don’t think they “break” anything – just be mindful of them! I personally use this app with a dimmer and just live with how it works. You may lose some “WAF” though
A WORD ABOUT PRESSING THINGS TOO FAST: Please be mindful that wall switches have a tendency to suppress an event if you press too soon after a state change (which is why Double Tap doesn’t work well). Now that this app supports “On” and “Off” presses, I think it behooves me to mention that if you are changing the state of a switch and THEN want to use another press to toggle your slave switches, give the switch a few seconds to get back to what I will call a “rest” mode. BETTER YET: If you intend to both turn your master switch on or off AND toggle your slave switches, do the toggle first and then the change to the master switch second. This will improve your user experience! (Of course this also depends on your configuration and what slaves you have attached to which command. Personally, I just toggle the same groups of lights with both “on” and “off” to avoid confusion).
This app allows you to utilize redundant “on” or “off” presses of a switch to control a secondary switch or group of switches. For example, if my living room track lights are “off” and I press “off”, I can toggle my corner lamp which has a GE Link Bulb. You can do the same for “on”, you can even have “off” and “on” control different switches!
Hope someone finds this useful: