Owning an oscilloscope is a real gamechanger ... Of course, you also need a PC, although there is apparently third-party software for Android if you don’t want to lug a laptop around.
Here’s a USB oscilloscope project from a few years ... Quick, small, and useful; a schematic, board layout, firmware, and PC software sources are all available for download.
The course will also invite you to utilize an oscilloscope. If you don't already have one, the faculty have recommended this OPTIONAL part: nScope oscilloscope ...