A free app for Android, by Tus Media S.L..
Tusclasesparticulares - Profes is an application that allows you to contact private tutors or students who are looking for a teacher. With it, you can easily send messages to the people who are looking for a teacher and send your request to the person who is the best fit for you.
And if you are a teacher, you can also send a message to the students who are looking for a teacher and want to take a class with you.
In this application, you can choose by subject, level, geolocation, experience, opinions, and chat previously by messaging. Remember: there is no limit of contacts, you can choose two or three and keep the one that convinces you the most.
And if you want to advertise as a teacher, you can easily do it for free. Just create a profile and send a message to the people who are interested in your classes.
