# Between Dates Calendar Math vs Calendar Clock

The clearest difference is review sentiment: Between Dates Calendar Math at 50% against Calendar Clock's 0%. Between Dates Calendar Math also leads on update cadence (every 4 months vs every 41 months) and device support (4 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Between Dates Calendar Math costs $0.99 and Calendar Clock $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Between Dates Calendar Math ships an update every 4 months, Calendar Clock every 41 months. The most recent releases landed on October 6, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Between Dates Calendar Math | Calendar Clock |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | **[4.8 (42 ratings)](https://appshunter.io/ios/app/between-dates-calendar-math/id442169104/reviews)** | — |
| Number of ratings | **42** | — |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 41 months |
| Monetization | Paid | Paid |
| Size | 1 MB | 4 MB |
| Requires iOS | **13.0** | 26.5 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ducky Planet LLC](https://appshunter.io/developer/442169107) | [Systemiko Inc.](https://appshunter.io/developer/680630947) |

## 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


### Calendar Clock

[App page](https://appshunter.io/ios/app/calendar-clock/id1451445740)

This app displays the current year, month, week, and time on a single screen with a clean design. It offers customizable theme colors and functions as a desk clock. The app disables device sleep mode while active.

**Highlights:** All-in-one screen display, Year, month, week, day, hour, minute, second, Switchable theme colors (dark, light, green, blue), Disables device sleep mode, Acts as a desk clock

**Features:** macOS Compatibility

**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 Calendar Clock free?

Calendar Clock costs $0.99, with no in-app purchases.

### Do Between Dates Calendar Math or Calendar Clock have ads?

Neither Between Dates Calendar Math nor Calendar Clock shows ads.

### Which is updated more often, Between Dates Calendar Math or Calendar Clock?

Between Dates Calendar Math ships an update every 4 months, and Calendar Clock every 41 months. Most recently, Between Dates Calendar Math was updated on October 6, 2026 and Calendar Clock on September 30, 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.*