# Between Dates Calendar Math vs Jike Alarm

The clearest difference is price: Jike Alarm at Free against Between Dates Calendar Math's $0.99. Jike Alarm also leads on update cadence (every 9 days vs every 4 months). Between Dates Calendar Math's advantage is ads (none vs shown) and device support (4 vs 1). On in-app purchases there is nothing between them.

Jike Alarm is free to download; Between Dates Calendar Math costs $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, Jike Alarm every 9 days. The most recent releases landed on October 23, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Between Dates Calendar Math | Jike Alarm |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| 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 | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | Paid | — |
| Size | 1 MB | 56 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ducky Planet LLC](https://appshunter.io/developer/442169107) | [Qinhuangdao Leiyang Technology Co., Ltd](https://appshunter.io/developer/1373150398) |

## 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


### Jike Alarm

[App page](https://appshunter.io/ios/app/jike-alarm/id6754262800)

**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 Jike Alarm free?

Jike Alarm is free to download, with no in-app purchases.

### Do Between Dates Calendar Math or Jike Alarm have ads?

Jike Alarm shows ads; Between Dates Calendar Math does not.

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

Between Dates Calendar Math ships an update every 4 months, and Jike Alarm every 9 days. Most recently, Between Dates Calendar Math was updated on October 23, 2026 and Jike Alarm on October 16, 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.*