Date.Time Calculator vs Date Check
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Date.Time Calculator
Calculate date and time differences, intervals, and perform unit conversions with a pure calculator interface. Useful for determining future or past dates, calculating total time for multiple events, and converting between various time units and POSIX time.
- Date and time point calculations
- Time interval calculations
- Unit conversion of time
- POSIX time interconversion
- Time zone mutual conversion
- Arithmetic operations with time
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Date.Time Calculator lets you easily perform calculations involving dates, times, and time intervals, as well as convert between units of time — all with the familiar feel of a calculator. Date.Time Calculator supports the following operations: * Basic arithmetic with numbers (integers and decimals) * Arithmetic with numbers and Time Intervals * Operations between Time Intervals (addition, subtraction, and division) * Operations between Time Intervals and Time Points (addition and subtraction) * Operations between Time Points (calculating the difference) * Conversion between units of time * Conversion to and from POSIX Time * Conversion between time zones Date.Time Calculator is especially useful for questions such as: * What date is 100 days from today? * What date and time was it 32,768 seconds ago? * If one lap takes 1 minute 32.6 seconds, how long will 62 laps take? * What time will it be after those 62 laps? * How many days have passed since January 23 of this year? * How many days are 100,000 seconds? * What date and time does POSIX Time 1234567890 represent? * What is the current time in POSIX Time? And with a little creativity, Date.Time Calculator can be useful in many other situations as well.
Date Check
Easily calculate future or past dates by adding or subtracting any number of days and/or weeks. This tool is useful for anyone needing to determine specific future or past dates, from medical professionals to everyday users.
- Calculate future dates
- Calculate past dates
- Add days and weeks
- Subtract days and weeks
- Customizable start date
- Switch between add/subtract modes
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Date check is an easy way to calculate a date in the future, or past, by using any number of days and/or weeks. Simply enter in the number of days, weeks, or both, to calculate the new date. Tap the + button to switch to subtract mode and calculate dates in the past. Tap again to return to addition mode for future dates. Tap the current date to change to a different start date for the calculation. Originally designed for Medical Doctors and Registered Nurses that need to calculate expiration dates of medicines, end dates for prescriptions, and valid documents such as a History & Physical, Date Check can be used by anyone who needs to know a specific date in the future or past.
Screenshots
Verdict
The clearest difference is review sentiment: Date Check at 100% against Date.Time Calculator's 0%. Date Check also leads on price (Free vs $0.99) and iOS requirement (8.0 vs 15.6). On update cadence, ads, 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
Date Check is free to download; Date.Time Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Date.Time Calculator ships an update every 5 months, Date Check every 4 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.
| Parameter | Date.Time Calculator | Date Check |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 5 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 8.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Noriaki HASHIBA | Salted Apps |
Customer experience
Date.Time Calculator
Date Check
In-app purchases
Date.Time Calculator
No in-app purchases
Date Check
No in-app purchases
Questions
Is Date.Time Calculator free?
Is Date Check free?
Do Date.Time Calculator or Date Check have ads?
Which is updated more often, Date.Time Calculator or Date Check?
Other comparisons
