Great idea! This app is the wrong implementation. – Brick by Brick for LEGO sets Review

Go green and have a digital library of Lego instructions! Good idea! Except if your child logs out of the app’s account, you can’t recover / reset the password - not through the app. Not through the developer’s webpage - there isn’t one. Good luck. You’d be better off saving PDFs to Dropbox. Hasn’t been updated in a year.
Review by Nathen1989 on Brick by Brick for LEGO sets.