Comparison

Date & Time Calculator vs Date Calculation Assistant

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Date & Time Calculator

Calculate the duration between two dates, including workdays, or add/subtract time units to a specific date. This tool helps with planning, scheduling, and tracking time-sensitive tasks with a clean, minimalist interface.

Highlights
  • Count days, months, years between dates
  • Add or subtract date and time units
  • Calculate business days in a range
  • Add or subtract working days
  • Option to include start date
  • Light and dark themes
  • Offline availability
Features
Read full description

Whether you're planning a vacation, scheduling a project or simply settling a "how many days until..." question, Date & Time Calculator gives you fast, accurate answers every time. This minimalist date duration calculator finds the exact number of days between two dates, and adds or subtracts time from any date with a single tap. No more counting squares on a calendar or guessing the math in your head. From everyday planning to precise business scheduling, it's the date and time tool that quietly handles the numbers so you don't have to. WHAT YOU CAN DO • Days between dates — calculate the exact gap between any two calendar dates in years, months, weeks, days, hours and minutes. • Add or subtract time — add or remove years, months, weeks, days, hours and minutes from any date to land on a new one. • Business days between dates — count only the working days within a range, ideal for project timelines and leave planning. • Add or subtract workdays — shift a date by a set number of working days, with customizable settings for your week. WHY YOU'LL LOVE DATE & TIME CALCULATOR • Precise results — accurate down to the minute, every single time. • Workday-aware — handle business days separately from calendar days. • Include start date — toggle whether the first day counts in your total. • Flexible settings — tailor every calculation to the way you work. • Clean and instant — get your answer the moment you enter the dates. • Works offline — no internet connection required. • Light & dark themes — a minimalist design that is easy on the eyes. • 70+ languages — built for users worldwide. HOW IT WORKS 1. Choose Difference, Add/Subtract or Workdays. 2. Enter your dates, or the amount of time to add or subtract. 3. Get your exact answer instantly — then plan with confidence. EVERYDAY USES • Count down the days to a holiday, birthday, wedding or deadline. • Work out a baby's due date or a pregnancy timeline. • Track notice periods, contracts, warranties and trial periods. • Plan project milestones and delivery dates in business days. • Find out exactly how long until — or since — any event. PERFECT FOR • Professionals managing timelines and business days. • Planners, freelancers and project managers. • Students and anyone with deadlines to hit. • Curious minds who just need the number, fast. WHY A DATE CALCULATOR BEATS A CALENDAR Flipping through calendar pages is slow and error-prone, especially across months or years, or when you only want to count working days. Date & Time Calculator does the heavy lifting instantly and accurately, so you can trust the result whether you're counting two weeks or two decades. ACCURATE BUSINESS-DAY MATH Project managers, HR teams, lawyers and freelancers all live by working days, not just calendar days. With dedicated workday tools, you can count the business days in a range or add and subtract working days from any date — perfect for delivery dates, notice periods and deadlines that skip the weekend. SIMPLE ENOUGH FOR EVERYDAY, PRECISE ENOUGH FOR WORK The clean, three-tab design keeps things effortless: pick what you want to calculate, enter your dates, and read your answer. There's nothing to learn and nothing to get in your way. Date and time calculator: count the days between two dates, add or subtract years, months, weeks, days, hours and minutes, calculate business days and workdays in any range, and find any deadline, duration, due date or anniversary with ease. Download Date & Time Calculator today and never do calendar math by hand again. Privacy Policy: https://www.shpavda.com/products/date-calculator/privacy/ Terms & Conditions: https://www.shpavda.com/products/date-calculator/terms/ios/

About

Date Calculation Assistant

Features
Read full description

Date Calculation Assistant helps you perform date calculations quickly and easily. Key Features: • Date Difference: Calculate the number of days between two dates. Select a date range and instantly see the result. • Date After: Calculate the date N days after a given date. Pick a base date, enter the number of days, and get the target date. • Date Before: Calculate the date N days before a given date. Pick a base date, enter the number of days, and get the target date. • Calculation History: All calculations are saved automatically. Browse, review, and reuse your past results in the History tab of each feature. Use Cases: - Plan project timelines and deadlines - Count days until or since important events - Calculate ages and durations - Plan travel or event dates - Track days between appointments or milestones Date Calculation Assistant features an intuitive interface with Calculator and History tabs for each tool, making date math simple and efficient. Terms of Use: https://date-calculator-2cf52.web.app/#/eula

Screenshots

Date & Time Calculator4 screens
Date Calculation Assistant4 screens

Verdict

The call

The clearest difference is ads: Date Calculation Assistant at none against Date & Time Calculator's shown. Date Calculation Assistant also leads on update cadence (every 5 days vs every 3 months). Date & Time Calculator's advantage is iOS requirement (13.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Date & Time Calculator sells 2 in-app purchases, starting at $0.99 per month and Date Calculation Assistant sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Date & Time Calculator ships an update every 3 months, Date Calculation Assistant every 5 days. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 7 level
Date & Time Calculator versus Date Calculation Assistant: the parameters behind the verdict, then further details
ParameterDate & Time CalculatorDate Calculation Assistant
PriceFreeFree
Rating4.8 (28 ratings) — better—
Positive reviews77.8% of reviews—
Number of ratings28 — better—
Update frequencyEvery 3 monthsEvery 5 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size114 MB35 MB
Age rating4+4+
DeveloperSHPAVDA, TOO玉辉 黄

In-app purchases

2 purchases

Date & Time Calculator

Subscriptions2
  • Monthly Ad-Free$0.991 Month
  • Yearly Ad-Free$9.991 Year
2 purchases

Date Calculation Assistant

Subscriptions2
  • Monthly Subscription$0.991 Month
  • Yearly Subscription$5.991 Year

Questions

Is Date & Time Calculator free?
Date & Time Calculator is free to download, with in-app purchases available.
Is Date Calculation Assistant free?
Date Calculation Assistant is free to download, with in-app purchases available.
Do Date & Time Calculator or Date Calculation Assistant have ads?
Date & Time Calculator shows ads; Date Calculation Assistant does not.
Which is updated more often, Date & Time Calculator or Date Calculation Assistant?
Date & Time Calculator ships an update every 3 months, and Date Calculation Assistant every 5 days. Most recently, Date & Time Calculator was updated on November 7, 2026 and Date Calculation Assistant on November 5, 2026.

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