My Collections is an application that helps you manage collections. It is available for Android and iOS devices.
It can:
manage an arbitrary number of diverse collections
synchronise the collection across multiple devices and accounts
support a large number of items
have a hierarchical structure using containers that can be nested to many levels
show pictures for each item, container and the collection
allow collections to be shared through an invite
allow public collections to be created which can then be viewed by anyone
manage users to give them write or administration access to your collections
For help and ideas on configuring a collection, see this page.
To view examples of collections, then have a look at the public collections.
Android users: Download it from the Google Play Store
Apple users: Download it from the Apple App Store