# DayCalc Pro vs Calculator with 12 button

The clearest difference is price: Calculator with 12 button at Free against DayCalc Pro's $0.99. Calculator with 12 button also leads on in-app purchases (none vs 9). DayCalc Pro's advantage is ads (none vs shown) and device support (4 vs 1). On update cadence there is nothing between them.

Calculator with 12 button is free to download; DayCalc Pro costs $0.99 up front. DayCalc Pro sells 9 one-off in-app purchases. Calculator with 12 button asks for nothing beyond the download.

DayCalc Pro ships an update every 6 weeks, Calculator with 12 button every 2 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | DayCalc Pro | Calculator with 12 button |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.6 (180 ratings)](https://appshunter.io/ios/app/daycalc-pro-note-calculator/id654444242/reviews)** | — |
| Number of ratings | **180** | — |
| Positive reviews | 85.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 98 MB | 42 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [良峰 侯](https://appshunter.io/developer/654444245) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### DayCalc Pro

[App page](https://appshunter.io/ios/app/daycalc-pro-note-calculator/id654444242)

This app combines a powerful calculator with a comprehensive unit converter. It offers standard and scientific calculations, allows notes to be added to history, and supports a wide range of units and custom conversions. Enjoy a user-friendly interface with customizable themes and watchOS integration.

**Highlights:** Standard and scientific calculator, Add notes to calculations, Over 600 units in 20 categories, Custom unit creation, Automatic currency exchange rate updates, Dark Mode support, Apple Watch integration

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Constants Pack | $0.99 | one-time |
| Festivals Theme Pack 1 | $0.99 | one-time |
| Season Theme Pack 1 | $0.99 | one-time |
| Bird Theme Pack 1 | $0.99 | one-time |
| Insects Theme Pack 1 | $0.99 | one-time |
| Season Theme Pack 2 | $0.99 | one-time |
| Festivals Theme Pack 2 | $0.99 | one-time |
| Custom Unit Pack | $1.99 | one-time |
| Complete Pack | $4.99 | one-time |

**What reviewers like**

- 👍 Easy to use and intuitive interface
- 🎨 Customizable themes and colors
- 📊 Comprehensive feature set (scientific, fractions, conversions)
- 💰 Great value for price (free or $1)
- 📝 Useful history/tape feature for tracking calculations

**What reviewers complain about**

- 🐛 Update installation issues and stuck downloads
- 🐛 Display cutoff in landscape mode on smaller phones
- 🐛 Fraction display cuts off large numbers
- 🐛 Currency converter fails after favoriting
- 🐛 Copy function only copies first number

**Reported bugs**

- Latest update stuck on download/installation loop
- Display rendering issues in landscape mode on iPhone 12/13 mini
- Fraction results display truncated with large numbers
- Fraction operator placement incorrect during multi-step calculations
- Currency conversion broken after favoriting currencies

**Requested features**

- Cursor movement for easier digit and symbol editing
- Back button to delete individual numbers instead of clearing all
- History display directly above input without clicking
- Back button in converter functions for easier navigation
- Improved animated transitions for better aesthetics


### Calculator with 12 button

[App page](https://appshunter.io/ios/app/calculator-with-12-button/id6754877013)

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

**In-app purchases:** none


## Frequently asked questions

### Is DayCalc Pro free?

DayCalc Pro costs $0.99, and also offers in-app purchases.

### Is Calculator with 12 button free?

Calculator with 12 button is free to download, with no in-app purchases.

### Do DayCalc Pro or Calculator with 12 button have ads?

Calculator with 12 button shows ads; DayCalc Pro does not.

### Which is updated more often, DayCalc Pro or Calculator with 12 button?

DayCalc Pro ships an update every 6 weeks, and Calculator with 12 button every 2 months. Most recently, DayCalc Pro was updated on October 26, 2026 and Calculator with 12 button on October 25, 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.*