if you have copier, printer or any Kyocera MFP product and you are learning with small group in classroom how to identify issues with your printer , you will need this application to know whats Error or "service code" mean.* app performance depends on you device free ram.we listed most popular Kyocera models and codes for offline users for FREE* . for sure we made some searches from internet to collect this information.Current supported (437 models) models like:3050ci,3550ci,3500i,4500i,5500i,3501i,4501i,5501i,8001i,7002i,7003i,8000i,8002i,8003i,9002i,9003i,FS 5500,FSC 5030N,KM 3050,KM 4030,P3050dn with every update it would be more* There are a limit for (using pro models and local search engine ) for free then you may buy this services one time for every device or you can just reinstall the app and it will works for free period again.