# Big Button Calculator Pro vs Calculator +ㅤ

The clearest difference is price: Calculator +ㅤ at Free against Big Button Calculator Pro's $9.99. Calculator +ㅤ also leads on update cadence (fortnightly vs every 2 months) and ratings volume (4.5K vs 463). Big Button Calculator Pro's advantage is in-app purchases (none vs 6) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Calculator +ㅤ is free to download; Big Button Calculator Pro costs $9.99 up front. Calculator +ㅤ sells 6 in-app purchases, starting at $2.99 per 7 days. Big Button Calculator Pro asks for nothing beyond the download.

Big Button Calculator Pro holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: Calculator +ㅤ has 4.5K ratings behind it against 463, so its average is the more settled of the two. Written reviews point the same way: 79% of Big Button Calculator Pro's written reviews are positive against 46% of Calculator +ㅤ's.

Big Button Calculator Pro ships an update every 2 months, Calculator +ㅤ fortnightly. The most recent releases landed on September 19, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Big Button Calculator Pro | Calculator +ㅤ |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.9 (463 ratings)](https://appshunter.io/ios/app/big-button-calculator-pro/id1131056963/reviews)** | [4.6 (4.5K ratings)](https://appshunter.io/ios/app/calculator-plus/id1597933199/reviews) |
| Number of ratings | 463 | **4.5K** |
| Positive reviews | **78.6% of reviews** | 45.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | **Paid** | Subscription |
| Best chart rank | **#181** | — |
| Size | 27 MB | 55 MB |
| Requires iOS | 15.2 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cider Software LLC](https://appshunter.io/developer/465180756) | [Rocket Apps GmbH](https://appshunter.io/developer/1566586717) |

## What reviewers say

### Big Button Calculator Pro

[App page](https://appshunter.io/ios/app/big-button-calculator-pro/id1131056963)

**Currently charting:** #181 Top Paid · Utilities (US App Store)

A user-friendly calculator app featuring large, colorful buttons and a dual-line display for simultaneous input and result viewing. It supports long equations, offers customizable themes and sounds, and includes accessibility features.

**Highlights:** Dual-line display, Big buttons, 18 color themes, Multi-line input, Gesture controls, VoiceOver accessibility

**Features:** Vision Pro support

**In-app purchases:** none


### Calculator +ㅤ

[App page](https://appshunter.io/ios/app/calculator-plus/id1597933199)

This app simplifies math with basic, scientific, and fraction calculations. It also features a unique snap-and-scribble function to solve problems from photos. Customize your experience with themes and access a calculation history.

**Highlights:** Snap and Scribble Calculator, Basic Calculator, Scientific Calculator, Fraction Calculator, Currency Converter, Calculation History, Customizable Themes

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rocket Apps PRO Weekly | $2.99 | per 7 days |
| Rocket Apps PRO Monthly | $4.99 | per month |
| Rocket Apps PRO Yearly | $9.99 | per year |
| Rocket Apps PRO Offer | $19.99 | per year |
| Rocket Apps PRO Yearly | $19.99 | per year |
| Rocket Apps PRO Yearly | $29.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 🚀 Accurate calculations
- 🎨 Excellent visuals
- 💡 Helpful for academic work

**What reviewers complain about**

- 💰 Subscription model too expensive
- 🔍 Decimal entry quirks
- 📺 Too many ads
- 🔒 Locked features behind paywall

**Reported bugs**

- Inaccurate square root calculations
- Compatibility issues on iPad
- Decimal point not recognized

**Requested features**

- Negative number support
- Improved fraction calculator
- Scientific calculator layout
- Option to disable history feature


## Frequently asked questions

### Is Big Button Calculator Pro free?

Big Button Calculator Pro costs $9.99, with no in-app purchases.

### Is Calculator +ㅤ free?

Calculator +ㅤ is free to download, with in-app purchases available.

### Which has better reviews, Big Button Calculator Pro or Calculator +ㅤ?

Big Button Calculator Pro is rated higher. Big Button Calculator Pro averages 4.9 out of 5 from 463 ratings, while Calculator +ㅤ averages 4.6 from 4.5K ratings.

### Do Big Button Calculator Pro or Calculator +ㅤ have ads?

Calculator +ㅤ shows ads; Big Button Calculator Pro does not.

### Which is updated more often, Big Button Calculator Pro or Calculator +ㅤ?

Big Button Calculator Pro ships an update every 2 months, and Calculator +ㅤ fortnightly. Most recently, Big Button Calculator Pro was updated on September 19, 2026 and Calculator +ㅤ on September 23, 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.*