Fluency Tutor comes in two apps - Teacher and Student.
On the students end, its offers a way for students to record their own reading behavior. The students could then listen to their reading of the passage or download it for future reference. The app comes with many reading passages filtered by lexile level or age. The student part of the app is and will always be free.
The teacher app has a free and premium aspect. Selecting the reading passages for students, and accessing student recording will remain free. The premium aspect of the app - trial available - center around the ability to assess student reading and corresponding metrics. The premium aspect of the app makes it very easy to do running records on reading passages. If the cost (un-released at present) of the premium features are reasonable, it will certainly be worth the purchase for a classroom teacher.