Apptrade is an OpenLedger project that aims to build a marketplace for investing in apps. App developers would use the network to connect with other developers, pool their apps together and create a federated public offering. Federated public offerings essentially operate like a fund, distributing dividends to investors from profits made from sales and royalties. The crowdsale involves the APPX Master Token, which represents a share in the Apptrade marketplace. Ten percent of profits made from every app portfolio on the network will be diverted to a Master Token fund which will be used in a system-wide buy back of Master Tokens one year after the network launches.