All current functionality on Improveo (as of Oct 2, 2017) is free and ideally should remain free when used in a limited way.
We're developing new functionalities to make education more effective and are looking for a revenue model which would be attractive for universities and other partners. As a Socratic platform, we prefer to ask what might be convenient and fair in our partner's opinion rather than expect anyone would pay for a new unknown platform.
We do need revenues and wish to create rewarding and transparent work opportunities. Mission without material backing is not fair. Improveo.org is operated by a non-profit association (Problemondo, z.s., registered in Prague, CZ) and all the costs are covered by our savings and time. We have gained no grants or external support and are open to investments and transformation to enable quicker and sustainable growth.
At the moment, our goal is a great usability and value for teachers, students and their universities. We have no intention to ask you to test and charge now.