Between Dates Calendar Math vs ShiftCal®
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
ShiftCal®
This app helps emergency service personnel manage complex 24-hour shift schedules. It supports multiple platoons and allows for easy customization of various shift patterns, including Kelly days and RDOs. Users can create and switch between different schedules for personal or professional use.
- Platoon-based 24-hour shift scheduling
- Customizable for 2-6 platoons
- Supports .ini shift schedule files
- Create and switch multiple schedules
- Display Kelly days, RDOs, debit days
- Paste from clipboard for quick schedule creation
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ShiftCal® is a platoon-based calendar for emergency service personnel working 24-hour shifts. It is easily customized for any regular schedule of two to six platoons and uses the same shift schedule (.ini) files as the desktop version. Create multiple shift schedules and switch between them at will - keep track of schedules for family members or neighboring agencies. Display Kelly days, RDO's, or debit days in an alternate color. Quickly create new shift schedules using the "Paste from Clipboard" option - see the "Help" tab. ShiftCal is not an appointment calendar - you already have an excellent one on your device. ShiftCal is a registered trademark.
Screenshots
Verdict
The clearest difference is review sentiment: Between Dates Calendar Math at 50% against ShiftCal®'s 0%. Between Dates Calendar Math also leads on rating (4.8 vs 1.0) and ratings volume (42 vs 2). ShiftCal®'s advantage is iOS requirement (11.0 vs 13.0). On update cadence, ads, in-app purchases and monetization model 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
Between Dates Calendar Math costs $0.99 and ShiftCal® $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Between Dates Calendar Math holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: Between Dates Calendar Math has 42 ratings behind it against 2, 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 0% of ShiftCal®'s.
Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 6, 2026 and September 27, 2026 respectively.
| Parameter | Between Dates Calendar Math | ShiftCal® |
|---|---|---|
| Price | $0.99 — better | $1.99 |
| Rating | 4.8 (42 ratings) — better | 1.0 (2 ratings) |
| Positive reviews | 50.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 42 — better | 2 |
| Update frequency | Every 4 months | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Ducky Planet LLC | Thomas Wesley Erickson |
Customer experience
Between Dates Calendar Math
ShiftCal®
In-app purchases
Between Dates Calendar Math
No in-app purchases
ShiftCal®
No in-app purchases
Questions
Is Between Dates Calendar Math free?
Is ShiftCal® free?
Which has better reviews, Between Dates Calendar Math or ShiftCal®?
Do Between Dates Calendar Math or ShiftCal® have ads?
Which is updated more often, Between Dates Calendar Math or ShiftCal®?
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