Serafim Chekalkin

Tap hard to survive the apocalypse!Collect radioactive rods to build your nuclear reactor:10 points -- plumbum rod30 points -- uranium rod60 points -- …

Want a powerful graphing calculator that works with the touch of a button? Then step up to Graphicus. Plotting, roots, points of inflection and much m …

With SwitchEEL any lightbulb becomes smart. The SwitchEEL app allows you to organise your lights into groups with personal name and image. Turn them o …