# Calculator SC vs Operations Diary

The clearest difference is update cadence: Operations Diary at weekly against Calculator SC's every 5 months. Operations Diary also leads on price ($0.99 vs $3.99). Calculator SC's advantage is device support (5 vs 3) and iOS requirement (12.0 vs 15.5). On ads and in-app purchases there is nothing between them.

Calculator SC costs $3.99 and Operations Diary $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Calculator SC ships an update every 5 months, Operations Diary weekly. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Calculator SC | Operations Diary |
| --- | --- | --- |
| Price | $3.99 | **$0.99** |
| Rating | **[4.7 (118 ratings)](https://appshunter.io/ios/app/calculator-sc-323pu/id301290196/reviews)** | — |
| Number of ratings | **118** | — |
| Positive reviews | 83.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | Paid | — |
| Size | 15 MB | 33 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Thomas Öllinger](https://appshunter.io/developer/301290199) | [Lars Schaefer-Dryden](https://appshunter.io/developer/642726139) |

## What reviewers say

### Calculator SC

[App page](https://appshunter.io/ios/app/calculator-sc-323pu/id301290196)

This app provides a multi-functional calculator with a familiar interface. It includes scientific, unit conversion, and logic calculation modes, along with extensive mathematical functions and constants. Calculations can be shared across modes, and it supports copy-paste functionality.

**Highlights:** Scientific calculator mode, Unit converter and calculator, Logic calculator (n-base conversion), Algebraic logic and calculation priority, Variables and memories, Complex number calculations, Unit and currency converter

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Mimics classic calculators
- 🚀 Fast and efficient
- 📚 Detailed manual included
- 💰 Great value for money
- 🔄 Continuously updated

**What reviewers complain about**

- 🐛 Comma behind every number
- 🐛 Angle unit display bug
- 🐛 Rounding errors with fractions
- 🐛 Incorrect handling of negative number exponentiation
- 🐛 Watch app functionality issues

**Reported bugs**

- Deg/Rad mode switching bug with inverse tangent function
- Rounding error when using fractions
- Incorrectly calculates negative numbers squared
- Watch app not working
- App opens not working after update

**Requested features**

- Ability to change ordering of fundamental constants
- Display expressions in scientific mode
- Larger font size for expressions in DAL
- Option to revert to older UI design
- Quadratic equation solver mode


### Operations Diary

[App page](https://appshunter.io/ios/app/operations-diary/id6760564390)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculator SC free?

Calculator SC costs $3.99, with no in-app purchases.

### Is Operations Diary free?

Operations Diary costs $0.99, with no in-app purchases.

### Do Calculator SC or Operations Diary have ads?

Neither Calculator SC nor Operations Diary shows ads.

### Which is updated more often, Calculator SC or Operations Diary?

Calculator SC ships an update every 5 months, and Operations Diary weekly. Most recently, Calculator SC was updated on October 29, 2026 and Operations Diary on October 28, 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.*