# Shift Calendar vs Scientific Calculator DES

The clearest difference is rating: Scientific Calculator DES at 4.3 against Shift Calendar's 2.3. Scientific Calculator DES also leads on review sentiment (50% vs 28%). Shift Calendar's advantage is ratings volume (83 vs 3) and price ($1.99 vs $5.99). On ads, in-app purchases and device support there is nothing between them.

Shift Calendar costs $1.99 and Scientific Calculator DES $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scientific Calculator DES holds the better App Store score, 4.3 against 2.3. That said, the two scores are not equally well evidenced: Shift Calendar has 83 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 28% of Shift Calendar's written reviews are positive against 50% of Scientific Calculator DES's.

Shift Calendar ships an update fortnightly, Scientific Calculator DES every 5 weeks. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Shift Calendar | Scientific Calculator DES |
| --- | --- | --- |
| Price | **$1.99** | $5.99 |
| Rating | [2.3 (83 ratings)](https://appshunter.io/ios/app/shift-calendar/id355449249/reviews) | **[4.3 (3 ratings)](https://appshunter.io/ios/app/scientific-calculator-des-38d/id1379779839/reviews)** |
| Number of ratings | **83** | 3 |
| Positive reviews | 27.9% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Monetization | **Free** | Paid |
| Best chart rank | **#191** | — |
| Size | 1 MB | 9 MB |
| Requires iOS | **8.4** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gil Estes](https://appshunter.io/developer/349882768) | [Dohmann Engineering Services](https://appshunter.io/developer/401682475) |

## What reviewers say

### Shift Calendar

[App page](https://appshunter.io/ios/app/shift-calendar/id355449249)

**Currently charting:** #191 Top Paid · Utilities (US App Store)

A customizable shift calendar designed for firefighters, paramedics, and EMS workers. Easily track work and off days for important personal events, supporting various common shift patterns. Includes note-taking for each shift day.

**Highlights:** Customizable shift schedules, Supports 24/24, 24/48, 24/72 patterns, Supports 48x96 pattern, Alpha and Numeric shift naming, Notes for each shift day, Designed for firefighters and EMS

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use
- 🎨 Customizable shift colors
- ✅ Works for basic schedules
- 📝 Notes feature is great
- 🔄 Smoothly running after updates

**What reviewers complain about**

- 💸 Waste of money
- 🚫 Only allows certain schedules
- 📉 Outdated and not updated
- ❌ Incompatible with new iOS
- 😵 Confusing multiple apps

**Reported bugs**

- Download did not complete
- App keeps crashing
- App does not open
- App is inoperable after Apple update
- App crashes when opening date and adding notes

**Requested features**

- Accommodate 48/96 schedules
- Support for 4 on 4 off shifts
- Support for 5 days on, 4 days off schedules
- Support for split shifts (2x10hrs off 24 then 2x14hrs then off for 4 days)
- Add more shift variations


### Scientific Calculator DES

[App page](https://appshunter.io/ios/app/scientific-calculator-des-38d/id1379779839)

This advanced calculator offers engineers and mathematicians a powerful tool with intuitive, multi-line display and left-to-right data entry. It supports various number bases, notations, and includes extensive statistical analysis and graphing capabilities. All features are available for a one-time purchase.

**Highlights:** Multi-line display with left-to-right entry, Supports Hex, Binary, Octal number bases, Decimal, Scientific, Fractional notation, Angle entry in degrees, radians, gradians, turns, 10 Memory Registers, Advanced statistics and graphing, Import CSV files for data sets

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

**In-app purchases:** none


## Frequently asked questions

### Is Shift Calendar free?

Shift Calendar costs $1.99, with no in-app purchases.

### Is Scientific Calculator DES free?

Scientific Calculator DES costs $5.99, with no in-app purchases.

### Which has better reviews, Shift Calendar or Scientific Calculator DES?

Scientific Calculator DES is rated higher. Shift Calendar averages 2.3 out of 5 from 83 ratings, while Scientific Calculator DES averages 4.3 from 3 ratings.

### Do Shift Calendar or Scientific Calculator DES have ads?

Neither Shift Calendar nor Scientific Calculator DES shows ads.

### Which is updated more often, Shift Calendar or Scientific Calculator DES?

Shift Calendar ships an update fortnightly, and Scientific Calculator DES every 5 weeks. Most recently, Shift Calendar was updated on November 6, 2026 and Scientific Calculator DES on November 2, 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.*