Let's just say I maximize my time, depending on the assignment by utilizing my smartphone. Sometimes it's more feasible to just wait until I get to my laptop, but I've began to transition to a new method of working by utilizing my smartphone to make best use of my time.
I'm glad you've thought about this, because you're right! Don't think of it as specific apps to help better yourself in mystery shop; think of your overall device and what you can do to save time, whether it be typing out segments for your narratives using your phone, filling out the report in real time and into the report form on your phone, etc. Technology has made amazing advancements this decade, so might as well take full advantage of it!
Very infrequently shopping the Greater Denver Area, Colorado Springs and in-between in Colorado these days.