Random Youtube AdSaw this on youtube, and since it seems to be a competitor to Double Take, I watched it.
superzoomtech.com
It's called Starscope Monocular. See small objects, miles away. Records photos to your phone. They compare it to a $4000 DLSR and it's capabilities. Fits in your pocket. sell it for $96 for list price. Interesting. Not sure if it is as powerful as DT, but is at least claiming similar functions.