There are some planner/calendar apps for smartphones and tablets. Probably every smartphone and tablet comes with one built in, and for many, that's enough. It reminds you when it is supposed to...it will tell you when you have an appointment, when to take your medicine, when to have the trash ready for pickup...whatever you tell it to tell you. And there is something fabulous about that!
Getting creative with your planning is something that has grown out of scrapbooking and memory keeping in much the same way Bible art journaling has become so popular. People have different ways of expressing themselves creatively. This is one way.
At this writing, there are two commercially available digital planners for use with the GoodNotes™, Metamoji Notes™, or OneNote™, and possibly other note-taking apps.
This is a brief overview of the two products. I have versions of both; they are both great and are quite similar in their functionality. The difference is in the touches the respective designers have included.
First up: The Seriously Simple Digital Planner™ from Spires Media. At present, the planners are available in an undated version (save a copy before decorating, and you can use it again in future years), and a customized version which can include dates, extra tabs, special "covers" and other amenities at an additional price. For use this year, there is a dated sampler that designer Tam Spires made available for free for people wanting to try it out.
The other designer of digital planners is Sandy Cruz of digitallyspeaking.net. The 2016 planners have been very popular and users are questioning when the 2017 edition will be out in the Facebook group dedicated to this planner.
As noted before, the planners from both designers are similar and work on the same principle. They are interactive PDF documents with links built in. Pressing on the tabs will take you to whatever page is linked to the tab.
In GoodNotes™, the links are functional. Unfortunately in Metamoji Notes, the links are not active , although users can create jump links.
The planners can be used also in OneNote™. One user who does this places each month in a different tab within OneNote, which makes it easy to use, although setup is a bit tedious. And the functionality of OneNote™ is superior to anything else. It just depends on which app fits your particular needs.