Hello here is a post that i did on XDA about mikey and others jack dust plug button:
Hello,
I will share my experience and knowledge with you.
First, to this day there is 3 product: the pressy button, the xaiomi mikey, and the klick button:
The first is a well known American kick starter project founded in 2013. To this day they did not delivered their product.
The klick button is a Chinese product founded on a Chinese kick starter equivalent also in 2013. In fact we can't say which is the copy of the two because the website of klick indicate their project started before pressy but their financing campaign was just after the pressy kickstarter. Today their product and app are on the market (you'll have to grab the app on their Chinese website if I remember).
The mikey from Xiaomi is the third "jack button" product to be released on the market. Their app is on Xiaomi forums. You can buy it on ibouyou for example. being the last one it is obviously a copy. To me I can't say the physical difference between the mikey and the klick. But their app are different.
You can check on ausdroid if you're interested in the "who's the original" fight. They did a nice article on it.
On the button themselves the mikey and klick are identical, and the pressy seems thinner when plugged in a phone.. Maybe the real product will be indentical to the others as well...
I bought the Xiaomi mikey.
First of all
I have a Xiaomi mi2s running cm11 and mokee. the app works great on both systems. I even tried the klick app and it work too (the app is in english).
Any button work with any app.. Hope it will work with the pressy app too.
So I tried the mikey app and the klick app.
Xiaomi mikey app:
See the screenshots to read all the functionalities.
++Can launch any app in a custom shortcut.
++almost all the shortcuts you would want (some are missing though)
++can launch complex tasks in one shortcut (ex: 1click=take a picture then share it via Google drive)
++ usefull system shortcuts (ex: vibrate mode, auto rotation...)
--no long press integration.
--Wakes up and unlock shortly the phone even when the shortcut does not need it (like vibrate mode). The screen goes directly to the launcher for a few second and goes back to the lock screen.
--no notification bar shortcut, no toogle panel shortcut
Klick app:
See the screenshots to read all the functionalities.
++Can launch any app in a custom shortcut.
++Can open the notification bar
++Can launch a custom toogle panel look alike
++Can use complex shortcuts based on combinaison between long and short clicks
+++ DOES NOT BYPASS THE LOCK SCREEN IF THERE IS ONE.
--Does not remember as much shortcuts as the mikey app
--Does not permit the user to use complex tasks
--No system shortcut beside the custom toogle panel.
I personally prefer the mikey app but as you can see, those two apps are not really complete.
All I can hope for the copied pressy guys is to release a wonderfull software to go with the pressy button that combines all the advantages from mikey and klick, and even further more, i'd even pay for the pressy software if it's worth it.
Doing a wonderfull app that you're willing to pay for if you paid the mikey or klick could save them from the others dirt cheap alternatives.