As most of the things for our memory "Practice makes perfect" is true. If we repeat the information we learned we increase retention rate and recall time. Its like motor, skills your neural paths are getting stronger and faster.
Yang the canary is designed to make you practice things that you learned often and increased periods, in other words with each recall its more likely that youll not forget or manipulate.
Its called Spaced Repetition and its a proven scientific method and used in many areas for studies for example language learning. Although we need to mention that this application is aiming to apply light implementation of this memory technique because in our current lifestyle its hard to spend so much time.
For that reason, In the current phase, its the most invisible app in your iPhone on purpose to keep you updated with only notification question and thats it! Youll be able to spend just 10 seconds a day to remind yourself of useful information.
Give it a shot for two weeks to see if it works for you.
Cheers.