Alternatively, Zonebox is also a great option for those who need to better understand how long their projects take so they can bill their clients more accurately and estimate the cost of projects more quickly. Were your estimations off? No problem, Zonebox allows you to change your time estimates quickly and easily. You can even turn “study mode” on and the app will ensure the only thing on your screen is your Zonebox timer so you can make sure you focus on offline projects as well.

Download Zonebox ($5)

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