Large Area Picosecond Photodetectors are (8 in. x 8 in. x 0.6 in) MCP photodetectors. While common PMTs are single pixel detectors, LAPPDs are able to resolve the position and time of single photons within a single detector with time and space resolutions higher than 3 mm and 100 picoseconds accordingly. Initial Monte Carlo simulations show that using LAPPDs of this accuracy would allow ANNIE to operate as a tracking detector with track and vertex reconstruction resolution on the order of a few centimeters.[5] These detectors are in their final stages of development.