Crystal Ball - NOT amateur radio

I am experimenting with crystal ball photo apps.  There seem to be several around. This is an old picture taken about 9 years ago.

Best Amateur Radio and SWL apps

The excellent Southgate ARS News page had a link http://wp.me/pn3uc-2cL to the best apps for smart phones (iOS and Android). If you have such a device some of these apps are worth considering.