Comparison

Between Dates Calendar Math vs ImpARial

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

ImpARial

Read full description

- Over +20 metric and imperial units in 7 categories: Distance, weight, temperature, speed, volume, area, and pressure units. - Use augmented reality to convert units and watch the results immediately. - The results are collected into a list. - Simply share the results with your colleagues or friends. - Convert the units using cam or in the selected picture. Whether you are a traveler or you have imported equipment from abroad and you want to have a better idea of foreign units of measurement, this application will help you and save a lot of time. You can copy and share the conversions with one tap. Supported units of measurement: - Distance: Miles ⇄ kilometers, yards ⇄ meters, feet ⇄ centimeters, inches ⇄ centimeters, inches ⇄ millimeters. - Weight: Pounds ⇄ kilograms, ounces ⇄ grams, short tons ⇄ tonnes, long tons ⇄ tonnes. - Temperature: Fahrenheit ⇄ Celsius, Fahrenheit ⇄ Kelvin, Kelvin ⇄ Celsius. - Speed: Miles per hour ⇄ kilometers per hour, miles per hour ⇄ meters per second, miles per hour ⇄ kilometers per second. - Volume: US pints ⇄ liters, UK pints ⇄ liters, US gallons of liquid ⇄ liters, UK gallons of liquid ⇄ liters, US fluid ounces ⇄ milliliters, UK fluid ounces ⇄ milliliters, US quarts ⇄ liters, UK quarts ⇄ liters. - Area: Square feet ⇄ square meters, acres ⇄ hectares, square miles ⇄ square kilometers. Terms of use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ WARNING: Converted units are rounded and may not be fully accurate. We are constantly working on bug fixes. We are not responsible for incorrect calculations. Screenshots may differ slightly from the app on your device. Although there are alcoholic beverages in the previews and screenshots, we do not recommend drinking alcohol. Consuming alcohol, even in small amounts, is dangerous, so on your vacation, enjoy unit conversions, not alcohol consumption. Use of the application is at your own risk, do not use the application while driving, cycling or any activity during which your inattention could endanger you in any way.

Screenshots

Between Dates Calendar Math4 screens
ImpARial4 screens

Verdict

The call

The clearest difference is price: ImpARial at Free against Between Dates Calendar Math's $0.99. ImpARial also leads on update cadence (fortnightly vs every 4 months). Between Dates Calendar Math's advantage is in-app purchases (none vs 2) and ads (none vs shown).

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

ImpARial is free to download; Between Dates Calendar Math costs $0.99 up front. ImpARial sells 2 in-app purchases, starting at $0.99 per month. Between Dates Calendar Math asks for nothing beyond the download.

UpkeepUpdate frequency

Between Dates Calendar Math ships an update every 4 months, ImpARial fortnightly. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

Scorecard6 real differences · 4 level
Between Dates Calendar Math versus ImpARial: the parameters behind the verdict, then further details
ParameterBetween Dates Calendar MathImpARial
Price$0.99Free — better
Rating4.8 (42 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings42 — better—
Update frequencyEvery 4 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS13.0 — better16.4
Further details — not scored
Size1 MB10 MB
Age rating4+4+
DeveloperDucky Planet LLCMichal Indra

In-app purchases

None

Between Dates Calendar Math

No in-app purchases

2 purchases

ImpARial

Subscriptions2
  • Monthly subscription3 Days trial$0.991 Month
  • Yearly subscription3 Days trial$4.991 Year

Questions

Is Between Dates Calendar Math free?
Between Dates Calendar Math costs $0.99, with no in-app purchases.
Is ImpARial free?
ImpARial is free to download, with in-app purchases available.
Do Between Dates Calendar Math or ImpARial have ads?
ImpARial shows ads; Between Dates Calendar Math does not.
Which is updated more often, Between Dates Calendar Math or ImpARial?
Between Dates Calendar Math ships an update every 4 months, and ImpARial fortnightly. Most recently, Between Dates Calendar Math was updated on November 1, 2026 and ImpARial on October 27, 2026.

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