Your request asks for a description of the "Designated" app, but the app name you provided is "[Calculator]". I do not have verified information about an app named "Designated" with that specific name on major app stores. To help, please confirm the correct app name or provide more details. If you meant the standard **Calculator** app, here is a description meeting your constraints: **Basic everyday calculator for quick, accurate math. Boosts productivity for students and professionals.**

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