Try it free for 30 days.
It was a glitch on my end. Somehow my device has unregistered itself from web Google Play. But I'm able to see and install this keyboard using play on my device all right.
Жду добавления русского с нетерпением.
MINUUM - The smarter, smaller keyboard that lets you do more with your screen space. It’s the little keyboard for big fingers!
Try it now at: http://goo.gl/JHIrC3
Minuum takes up less than half the screen space of regular keyboards while still allowing you to type delightfully fast and surprisingly sloppy—all thanks to revolutionary new auto-correction. Spend 15 seconds with the introductory tutorial and you'll be able to start typing with Minuum—instantly. The more you type, the better Minuum gets. Try it now.