# Between Dates Calendar Math vs Prime Factors Of

The clearest difference is update cadence: Between Dates Calendar Math at every 4 months against Prime Factors Of's every 13 months. Between Dates Calendar Math also leads on device support (4 vs 2) and iOS requirement (13.0 vs 18.6). On price, ads and in-app purchases there is nothing between them.

Between Dates Calendar Math costs $0.99 and Prime Factors Of $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, Prime Factors Of every 13 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Between Dates Calendar Math | Prime Factors Of |
| --- | --- | --- |
| 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 | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 13 months |
| Monetization | Paid | — |
| Size | 1 MB | 51 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ducky Planet LLC](https://appshunter.io/developer/442169107) | [Anthony Caggiano](https://appshunter.io/developer/828737536) |

## 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


### Prime Factors Of

[App page](https://appshunter.io/ios/app/prime-factors-of/id1516210415)

**Features:** macOS Compatibility, Vision Pro support

**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 Prime Factors Of free?

Prime Factors Of costs $0.99, with no in-app purchases.

### Do Between Dates Calendar Math or Prime Factors Of have ads?

Neither Between Dates Calendar Math nor Prime Factors Of shows ads.

### Which is updated more often, Between Dates Calendar Math or Prime Factors Of?

Between Dates Calendar Math ships an update every 4 months, and Prime Factors Of every 13 months. Most recently, Between Dates Calendar Math was updated on November 1, 2026 and Prime Factors Of on November 3, 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.*