Best apps like Datum - Calendar

10+ similar apps compared and reviewed

3.5 avg rating
2 free apps
Updated September 2026

Datum is great, but it's not the only option. Explore 10+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.

Top Alternatives to Datum

DayNumCalc#1

DayNumCalc by Mayra M Martinez

Day number & date calculations
Editor's Choice
πŸ”§ Utilities
4.8(6 ratings)
$0.99
DayNumCalc screenshot 1
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This utility app provides quick access to date calculations, including finding the day number for any date, determining a date from a day number, calculating the difference between two dates, and checking the day of the week. It also offers widgets for convenient access on your home and lock screens.

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Easily track countdowns and count-ups for all your significant life events. Share these milestones with friends and family through various messaging and social platforms. Discover fun date-based facts and impress others with your knowledge of time.

Track past and future datesShare dates via email, messages, and social mediaSupports iOS and watchOS with iCloud sync
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Customize your watch face with a highly visible date complication. Choose from various formats, adjust size, and personalize colors to match your style. Supports Japanese era names for a unique touch.

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Gasdruck
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This application provides accurate atmospheric pressure and altitude readings directly from your watch's barometer. It's designed for outdoor enthusiasts and weather watchers, offering real-time data and forecasting capabilities.

Accurate pressure readingsReal-time altitude trackingWeather forecasting
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Color Date Plus
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