"He listens well who takes notes" said Dante, the Italian poet.
And he has a very good point, because I forgot what my plans for this evening were (probably just watching TV and drinking beer). But on a serious note, UpWord Notes is a great app to keep up with everything you need to remember. The simple swipe gestures help you visualise what your priorities are, there are great sound effects, a search function, and customisable options! The app is normally 0.89€, and today you can also get many different themes and fonts worth up to 0.89€, all for FREE!