While I'm fortunate enough that our classes are progress monitored by our Accelerated Reading Instructors, I do still work with small groups of students who are actively trying to improve their fluency. I used Fluency Finder with them to supplement my data. The process is very easy.
When the app is launched, you easily add your students by name and grade.
Choose the passage on app so you can follow along. (Reading levels range from 1.2 to 8.8, which is another thing that makes the app valuable. Regardless of student ability, this app is applicable and can be used.)
When the student begins reading, you push 'start' on the app and the timer begins.
As you follow along, there is a '-' (minus) and '+' (plus) sign below the passage; if a student has an error, you push the minus sign. If the word is self-corrected, you can push the plus sign to add it back to their score.
Once the student has finished the passage, you end timer and move on to "Finish Assessment"
The part I liked the most, besides being user friendly and easy to use, was the fact that the app takes comprehension into consideration. Let's be honest- reading isn't reading if a student doesn't understand what they are reading. So the app gives you general questions about the passage for the student to answer.
Once you're done, the app then shows you the results data and that data is then kept on the device for each student you have enrolled.