Comparison

Between Dates Calendar Math vs Whenr Whenr

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

Head to head
About

Between Dates Calendar Math

Calculate the number of days between two dates with a simple interface. Save, recall, sort, and remove date calculations. Add or subtract days from selected dates for quick date projections.

Highlights
  • Calculate days between dates
  • Save and recall date calculations
  • Sort and remove saved dates
  • Add or subtract days
  • Copy dates to start/end
  • Reset dates to current
Features
Read full description

Between Days was written to quickly tell how many days are between two dates. It uses a simple interface to get these answers in the quickest way possible. Underneath the simplicity, Between Days is one of the most feature rich date apps in the app store. Don’t let the simple interface fool you, this app does show a lot of information in a clean and easy to use format. To use the app simply set the start date and end date and it will display the number of days between those two dates. To select which date to edit you can either touch the date you want to change, or press the setting start date/ setting end date button. The selector will automatically change to display the date selected. It will also display the current day of the week showing on the calendar selector. If you would like to save the date for later, simply press the save button on the bottom. To recall a date, or to view saved dates press the view dates button on the bottom. Once you are at the list of dates you can sort or remove them. You can also press on a date to use it as the current date, or press done to return to your previous dates. There are also add and subtract buttons. This is useful if you need to find what the date is before or after a certain number of days, month or years. The copy to end date/copy to start date button will set both the start date and end date to the selected date. The reset button will set the beginning and end date to the current date, but will leave your saved dates alone. I hope you enjoy this app and find it useful! If you have any questions or comments send me an e-mail at Don.Espe@gmail.com Please rate this app so I know if there is enough interest to develop new features for it.

About

Whenr Whenr

This app simplifies complex time calculations, helping you easily determine time differences, future times, and duration sums. It offers an intuitive interface and convenient options to copy, set reminders, or share results.

Highlights
  • Calculate time differences
  • Determine future times
  • Sum time durations
  • Copy results to clipboard
  • Create reminders from results
  • Share time calculations
Features
Read full description

Doing math with dates and times is hard. Whenr Whenr makes it easy, with a simple calculator-style interface for dates, times, durations, and unit conversions. There are no awkward forms, no modes to switch between, and no workflows to learn. Just type in your values, select the function you want to apply, and get your answer. With Whenr Whenr you can: - Answer time questions quick and easy. For example, calculate “how long is it from now until 7:42?” or “what time will it be in 4 hours and 47 minutes?”? - Count days between dates, add weeks to a date, or work across months without manually counting. - Make schedules easier to reason about. Figure out equal turns, manipulate durations, split time fairly, and keep plans running smoothly. - Make weird durations readable. Convert amounts like 400 hours into weeks, 5,000 minutes into days, or 10,000 seconds into hours, so you can actually think about them. And it does all this in a familiar calculator-style interface - not a maze of tabs and dropdowns. There's no mode switching, no confusing forms, and no translating your question into an app's weird logic. You just enter dates and times using the keypad and get the right answer fast.

Screenshots

Between Dates Calendar Math4 screens
Whenr Whenr4 screens

Verdict

The call

The clearest difference is price: Whenr Whenr at Free against Between Dates Calendar Math's $0.99. Whenr Whenr also leads on review sentiment (67% vs 50%) and rating (5.0 vs 4.8). Between Dates Calendar Math's advantage is update cadence (every 4 months vs every 22 months) and ratings volume (40 vs 4). On 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

CostPrice · In-app purchases · Ads · Monetization

Whenr Whenr is free to download; Between Dates Calendar Math costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Whenr Whenr holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Between Dates Calendar Math has 40 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 50% of Between Dates Calendar Math's written reviews are positive against 67% of Whenr Whenr's.

UpkeepUpdate frequency

Between Dates Calendar Math ships an update every 4 months, Whenr Whenr every 22 months. The most recent releases landed on August 28, 2026 and September 2, 2026 respectively.

Scorecard7 real differences · 3 level
Between Dates Calendar Math versus Whenr Whenr: the parameters behind the verdict, then further details
ParameterBetween Dates Calendar MathWhenr Whenr
Price$0.99Free — better
Rating4.8 (40 ratings)5.0 (4 ratings) — better
Positive reviews50.0% of reviews66.7% of reviews — better
Number of ratings40 — better4
Update frequencyEvery 4 months — betterEvery 22 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, Mac
Requires iOS13.0 — better16.1
Further details — not scored
Size1 MB4 MB
Age rating4+4+
DeveloperDucky Planet LLCDarin Kelkhoff

Customer experience

Between Dates Calendar Math

All ratings40 ratings
Positive95.0%
Neutral0.0%
Negative5.0%
Written reviews8 reviews
Positive50.0%
Neutral25.0%
Negative25.0%

Whenr Whenr

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

Between Dates Calendar Math

No in-app purchases

None

Whenr Whenr

No in-app purchases

Questions

Is Between Dates Calendar Math free?
Between Dates Calendar Math costs $0.99, with no in-app purchases.
Is Whenr Whenr free?
Whenr Whenr is free to download, with no in-app purchases.
Which has better reviews, Between Dates Calendar Math or Whenr Whenr?
Whenr Whenr is rated higher. Between Dates Calendar Math averages 4.8 out of 5 from 40 ratings, while Whenr Whenr averages 5.0 from 4 ratings.
Do Between Dates Calendar Math or Whenr Whenr have ads?
Neither Between Dates Calendar Math nor Whenr Whenr shows ads.
Which is updated more often, Between Dates Calendar Math or Whenr Whenr?
Between Dates Calendar Math ships an update every 4 months, and Whenr Whenr every 22 months. Most recently, Between Dates Calendar Math was updated on August 28, 2026 and Whenr Whenr on September 2, 2026.

Other comparisons