I'm a newbie so please go easy on me! Hope I've got this in the right place and I know enough as to not embarras myself!
I've found something called "Flic" which are dinky neat little buttons that link to wifi things to do stuff. They indegrate with a load of different brands, and integration with Sonoff would be fab. Could you look at developing this? Flic works with IFTTT so I'm hoping if you guys are working on that too then a piggy-back integration would be possible in the future, however direct Flic integration would be even better.
Hope this makes sense! (if not, apologies, I'm still learning!)
This is their website.... https://flic.io/ I'm not connected with them in any way.