Just to throw another spin on it, one of the reasons that most of these types of programs (not meaning tablet, but programs created by small companies) die is that no one wants to spend any money on them. $100 might sound like a lot but it's nothing in the context of a small market product. The person, often someone who's never faced the realities of keeping a company going, may think it sounds like a lot but probably soon realizes that the size of the market means that he/she will never sustain a company selling it for that price, and so they have to bail out and go do something else to survive.
Unless the company is large, and are basically just selling the software in order to provide an ancillary product to help them sell more hardware or online service, where they make their real money, it's going to be nigh impossible to run a company in this very limited sized market selling a software app for $100 or less. ANd of course in the DIY automation world, it's nigh impossible to sell any software for MORE than $100. So the situation exists where it becomes very difficult for anyone to have a company selling software to the DIY automation market. People naively get into it, then realize it's just not sustainable. They'll get an initial hit of customers and think they are on their way, then it stops because they quickly saturate such a small market.
Folks have to understand this issue. The small software developer is the mom&pop store of the new millenium, and there's a reason not many mom&pop stores survived the previous one. No one wants to pay the price to support those types of companies anymore. So it's either big companies who only do it in order to sell more hardware or get you onto their cloud, or people doing small apps in their spare time without the revenues or time available to really make it a serious endeavor and selling them for almost nothing. That 'selling them for almost nothing on an app store' paradigm only works if it's something that will appeal to millions of people. A product like the one being discussed here is probably lucky if even a couple thousand people will ever buy it. Do the math and you'll see why $100 a pop will never sustain such a company.
And of course that creates a downward spiral where people then won't even spend the $100, and it just gets worse and worse.