Give it a few tries before you judge
Within 5 seconds I thought I would hate this app. Hearing that loud ticking noise was more then I could bear. But seeing the overwhelming reviews I decided to try it again and as long as you focus on the task at hand the ticking sound seems to fade away into the distance and actually does an amazing job to guide you to keep your focus. In short make sure you try it for at least an hour to see the effects
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Focus Keep Free : Work & Study Timer, v1.8.4