AdvancedLookup is a cutting-edge application for SharePoint 2013 which enables you to work with lookup fields in list item forms efficiently and much easier! AdvancedLookup extends standard lookup fields in New and Edit list item forms (only ListFormWebPart is supported) to dynamic comboboxes with search capability that allows you to find items for lookup, in the search results view you can sort items by ID or display name of the lookup field, you can also open and add new lookup items.
This is a full version of the app, it is licensed per farm with no user limitation and subscription.
PLEASE USE THE "for more than 1 person in your organization" OPTION WHEN BUYING THE APP.
The free demo version named AdvancedLookup Demo is also available on the store.
Both versions of the app can be used on Office 365.