Khan Academy has evolved into a robust free resource full of courses for many content areas including math. Students can simply access the content or teachers can utilize the tool and assign and keep track of student work.
This resource covers many content areas including Math. This is a paid subscription resource, but you can explore the activities or get the free trial before making a purchase. Maybe your site already has a subscription?
Students count and calculate the basic math facts and then progress to recalling them with automaticity. Recalling math facts, instead of calculating them, frees up mental resources for higher-level operations. Progress reports available with set up. This FREE resource is available as a web and iOS app.