# Between Dates Calendar Math vs K4us English Keyboard

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.

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.

## The numbers

| Metric | Between Dates Calendar Math | K4us English Keyboard |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | **[4.8 (42 ratings)](https://appshunter.io/ios/app/between-dates-calendar-math/id442169104/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/k4us-english-keyboard/id978718484/reviews) |
| Number of ratings | **42** | 2 |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 weeks** |
| Monetization | Paid | Paid |
| Size | 1 MB | 3 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ducky Planet LLC](https://appshunter.io/developer/442169107) | [4us](https://appshunter.io/developer/320142471) |

## What reviewers say

### Between Dates Calendar Math

[App page](https://appshunter.io/ios/app/between-dates-calendar-math/id442169104)

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:** Vision Pro support

**In-app purchases:** none


### K4us English Keyboard

[App page](https://appshunter.io/ios/app/k4us-english-keyboard/id978718484)

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.

**Highlights:** 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

**In-app purchases:** none


## Frequently asked questions

### Is Between Dates Calendar Math free?

Between Dates Calendar Math costs $0.99, with no in-app purchases.

### Is K4us English Keyboard free?

K4us English Keyboard costs $0.99, with no in-app purchases.

### Which has better reviews, Between Dates Calendar Math or K4us English Keyboard?

Between Dates Calendar Math is rated higher. Between Dates Calendar Math averages 4.8 out of 5 from 42 ratings, while K4us English Keyboard averages 3.0 from 2 ratings.

### Do Between Dates Calendar Math or K4us English Keyboard have ads?

Neither Between Dates Calendar Math nor K4us English Keyboard shows ads.

### Which is updated more often, Between Dates Calendar Math or K4us English Keyboard?

Between Dates Calendar Math ships an update every 4 months, and K4us English Keyboard every 4 weeks. Most recently, Between Dates Calendar Math was updated on October 23, 2026 and K4us English Keyboard on October 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*