The most common question we get is whether we plan to support multiple platforms. Right now, I can say with 100% certainty that we will.
Our main strategy by launching with only iOS support was to ensure a good user experience on one platform rather than a crummy experience on multiple platforms. Due to hardware and software variations between different phone and tablet vendors, it is much harder to ensure fast Bluetooth LE transmission on Android vs iOS. The app might work really well on one phone model but not at all on another without additional testing and modification. This made our launch platform decision very clear: iOS
Our iOS app is fully native, written in Apple's new language: Swift. We chose to write a native app first to ensure a high-quality user experience in the minimal amount of time. Our next platform priorities are Windows and Android. To achieve this, we are going to create a second app using a cross-platform toolkit. Over time, we will additionally add support for Linux and MacOS as we add polish for those platforms.
If you are one of those people waiting for us to branch out from iOS: Don't worry, we'll get there. We plan to release an initial cross-platform app by Sept. 2017, with beta versions available before then.
If you can't wait that long, there has never been a better time to buy an iPad. Apple just dropped their prices and you can buy a full-sized iPad for $329. The iPad mini 2 is going for around $250 on amazon.