The J.F.V. Grotius app, developed by Youmie. Are you a member of J.F.V. Grotius and want to stay informed about everything happening at our club? Download the app now! Through our app, you'll be kept informed about upcoming events, the latest news, view the Almanac, respond to each other's wall posts, tag other members, view photos, and much more. You'll also find all the information you need about J.F.V. Grotius.