# Between Dates Calendar Math vs ShiftCal®

The clearest difference is review sentiment: Between Dates Calendar Math at 50% against ShiftCal®'s 0%. Between Dates Calendar Math also leads on rating (4.8 vs 1.0) and ratings volume (42 vs 2). ShiftCal®'s advantage is iOS requirement (11.0 vs 13.0). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Between Dates Calendar Math costs $0.99 and ShiftCal® $1.99 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 1.0. 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 point the same way: 50% of Between Dates Calendar Math's written reviews are positive against 0% of ShiftCal®'s.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 6, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Between Dates Calendar Math | ShiftCal® |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | **[4.8 (42 ratings)](https://appshunter.io/ios/app/between-dates-calendar-math/id442169104/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/shiftcal-the-ff-calendar/id1046906589/reviews) |
| Number of ratings | **42** | 2 |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Paid | Paid |
| Size | 1 MB | 20 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ducky Planet LLC](https://appshunter.io/developer/442169107) | [Thomas Wesley Erickson](https://appshunter.io/developer/710639944) |

## 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


### ShiftCal®

[App page](https://appshunter.io/ios/app/shiftcal-the-ff-calendar/id1046906589)

This app helps emergency service personnel manage complex 24-hour shift schedules. It supports multiple platoons and allows for easy customization of various shift patterns, including Kelly days and RDOs. Users can create and switch between different schedules for personal or professional use.

**Highlights:** Platoon-based 24-hour shift scheduling, Customizable for 2-6 platoons, Supports .ini shift schedule files, Create and switch multiple schedules, Display Kelly days, RDOs, debit days, Paste from clipboard for quick schedule creation

**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 ShiftCal® free?

ShiftCal® costs $1.99, with no in-app purchases.

### Which has better reviews, Between Dates Calendar Math or ShiftCal®?

Between Dates Calendar Math is rated higher. Between Dates Calendar Math averages 4.8 out of 5 from 42 ratings, while ShiftCal® averages 1.0 from 2 ratings.

### Do Between Dates Calendar Math or ShiftCal® have ads?

Neither Between Dates Calendar Math nor ShiftCal® shows ads.

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

Between Dates Calendar Math ships an update every 4 months, and ShiftCal® every 4 months. Most recently, Between Dates Calendar Math was updated on October 6, 2026 and ShiftCal® on September 27, 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.*