Arignote Timetable builds complete, clash-free school timetables automatically. Schools enter their teachers, groups, subjects and rooms, press Solve, and a constraint solver places every lesson while respecting teacher availability, part-time staff, specialist rooms and electives. A real secondary school with 418 weekly lessons is solved in about two seconds. After solving, sessions can be dragged where you want them or pinned in place, with live conflict detection. It imports school data from FET, Untis, aSc TimeTables, Peñalara GHC, Additio and PlanIt, exports PDF, Excel and HTML, and runs natively on Windows, macOS, Linux, iPad and Android in eight languages. Made by Arignote OÜ in Estonia, with data hosted in the EU and a free plan for small schools.