Counting? Nine, ten... well done! Was that last rep tough? How about 20 reps? Nineteen, twenty... final rep tough? Good. But you blasted through the first nineteen, including reps nine and ten!
The psychology of counting and hitting that final rep. Don't Count! is a simple countdown utility that helps by tracking those reps for you, letting you ignore the impending final few reps and concentrating on form. Let the app do the counting, it won't sweat it.
Listen for the audio cues and keep going until the finish. Adjust the tempo of each rep as you see fit. Don't Count! and you will complete that set just fine.