I look at success. Apple has 6 times as many apps as all the different versions of Android. And many businesses are using the iPhone. So please do let us all see the industrial software you have written for Android, and let us know how many people are using it.
iPhone was released on June 29, 2007. First mass market Android phones started appearing last winter; Motorola Droid was released some time around October 30, 2009. iPhone had two years of head start, I think it counts for something.
And many businesses are using the iPhone
Most businesses use Blackberry, for excellent reasons. I haven't heard of any business that loaded their own software on company-issued iPhones. And if the business is giving out iPhones just for talk and email, it doesn't count - all smartphones do that. Please wake me up when a business develops, for example, a Bluetooth (or 802.11) app for the iPhone that allows the iPhone to page someone over the speakers in the building.
So please do let us all see the industrial software you have written for Android, and let us know how many people are using it.
In my experience, it doesn't matter how many people are using your industrial software. What matters is how much they pay for that, and whether they are happy. Sometimes I write software to operate unique equipment; sometimes I also build that equipment. I had a contract some years ago to build a device for a single physics experiment; it was loaded with stuff that only this customer could have had any use for.
I don't have an Android phone at the moment, mostly because I'm too lazy to get one, and I have other equipment that fits the bill right now, and I'm also pretty busy on other projects. But if I had the phone I'd certainly put it to some use - for example to operate hardware that I have (and that most people never heard of.) Each copy of such hardware costs some serious money, but apparently it's worth it, otherwise nobody would be buying.