Awesome job dude, well done! It's just simple as it needs to be, don't mess it up. Just try to be more clear and simple on monetization. Hit and finish me with just something like this : "There will be two plans: free 500 items plan and paid for 500 or more items. Paid plan will be 4.99$ for a year and we will have 2 million users in two years". Because, as you know, nowadays analyzing people's data is horrible business model for monetization because of privacy.