This App divided into three category. Namely "My Collection", "My Wishlist" and "My Exchange".
Record all related brick in your collection.
Record all related brick of wish in your wishlist.
"My Exchange" purpose is for those brick your wish to exchange with other.
Step 1 : Create a new exchange activity.
Step 2 : Add brick to the activity.
Step 3 : Modify brick quantity.
Step 4 : After complete the above step then click complete button. That will be move all the brick to "My Collection". Similar brick the quantity will be total up.
"My Exchange" activity also can use as grouping of brick.