Oystro is a meeting scheduler that uses mobile numbers to schedule meetings with your friends, family and business contacts on the go without the frustration of numerous emails, irrelevant messages in your favourite messaging app or multiple phone calls. You can create meeting invites and send them to your contacts who are using Oystro. If contacts you want to invite are not on Oystro then you can save the meeting invite with no invitees and then share it with your non-Oystro contacts via SMS, email, your favourite messaging app or even social media for a public event. You get notified of their RSVPs within Oystro. Oystro updates mobile calendars for reminders and you can also chat with invitees within a meeting invite to have focused conversations around the meeting.