Between Dates Calendar Math vs K4us English Keyboard
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.
K4us English Keyboard
This keyboard app offers enhanced typing efficiency for iPhone and iPad users with features like arrow keys and a unique vowel input system. It aims to speed up text entry, especially for two-thumb typing, and includes customizable sound settings.
- Arrow keys for precise cursor control
- Efficient vowel and alphabet input
- Optimized for two-thumb typing
- Customizable key sound settings
- iPad-specific ten-key layout
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For iPhone User please try AEI Keyboard Note English. (This app is Free) Original English Keyboard for iPhone & iPad * With Arrow Keys * Ideal Key for iPhone (We called “AEI Keyboard”.) * iPad Special Ten Keys like PC Ten Keys. About AEI Keyboard - Only One Push to input Vowel (letter). - Less than Two Push to input Alphabet. (any letter) - Input faster with Two Thumbs. Useful keyboard Settings (tap"tools") You can turn off Key Sound from it. *Please add this Keyboard from iOS Setting and switch "Allow Full Access"
Screenshots
Verdict
The clearest difference is rating: Between Dates Calendar Math at 4.8 against K4us English Keyboard's 3.0. Between Dates Calendar Math also leads on ratings volume (42 vs 2) and iOS requirement (13.0 vs 15.6). K4us English Keyboard's advantage is update cadence (every 4 weeks vs every 4 months). On price, review sentiment, ads and in-app purchases 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 K4us English Keyboard $0.99 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 3.0. 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 split almost evenly too, at 50% and 50% positive.
Between Dates Calendar Math ships an update every 4 months, K4us English Keyboard every 4 weeks. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.
| Parameter | Between Dates Calendar Math | K4us English Keyboard |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 4.8 (42 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| Number of ratings | 42 — better | 2 |
| Update frequency | Every 4 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 1 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Ducky Planet LLC | 4us |
Customer experience
Between Dates Calendar Math
K4us English Keyboard
In-app purchases
Between Dates Calendar Math
No in-app purchases
K4us English Keyboard
No in-app purchases
Questions
Is Between Dates Calendar Math free?
Is K4us English Keyboard free?
Which has better reviews, Between Dates Calendar Math or K4us English Keyboard?
Do Between Dates Calendar Math or K4us English Keyboard have ads?
Which is updated more often, Between Dates Calendar Math or K4us English Keyboard?
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