Today only (01/12/2019)
http://www.bitsdujour.com/software/goalenforcer-hyperfocus

GoalEnforcer Hyperfocus is a focused mind mapping application, specially cut for goal setting, brainstorming, project management and task management, including several visualization modes.
It has been developed since 2004 and it's now available for Windows, Mac, Android (free), and iOS (free).

New free iOS version, adding full support for iPhone XS and XR, released yesterday:
https://itunes.apple.com/us/app/goalenfocer/id1372594906

You can check the latest visualization modes at:
https://www.goalenforcer.com/visualreports.html

It's actually a better deal than 42% off -- the full price of the Hyperfocus level is $112 so at $39 that's about 65% discount.

https://www.goalenforcer.com/buymac.html