Fragmentation story: I have an iPhone and wanted to convince people to use Threema instead of WhatsApp. Only 1 person wanted to give it a try. I was happy. It'

Fragmentation story: I have an iPhone and wanted to convince people to use Threema instead of WhatsApp. Only 1 person wanted to give it a try. I was happy. It's a start. But he has an HTC Desire HD. He is stuck at Android 2.3 and wasn't able to install Threema.