Calculator vs Calculator HD Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator
This is a straightforward calculator application designed for ease of use and clear readability. Users can personalize the app's appearance by choosing their preferred background and display themes.
- Easy to use interface
- Clear display
- Customizable background
- Customizable display themes
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Calculator-- is a simple calculator that is easy to use and read. Select the desired background and display. If you like this app, please consider giving it a rating. Your support will help keep the updates coming! Thank you for your support!
Calculator HD Pro
This app offers a powerful and customizable calculator experience with a dual-line display for seeing input and results simultaneously. Save and organize your calculations with history, labeling, and email options. Personalize layouts, themes, and fonts for a comfortable and efficient user experience.
- Dual-line display
- Multi-line input
- Calculation history
- Customizable layouts and themes
- Full scientific functions
- Left-handed mode
- VoiceOver accessibility
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A colorful calculator with big buttons, comprehensive features, and extensive customization. Used by millions. Completely ad-free. SEE EVERY STEP ・Dual-line display - shows your input and result simultaneously ・Multi-line input for long equations ・Tap & hold to move the cursor or copy and paste where you want SAVE YOUR WORK ・History saves every calculation with time and date ・Label important calculations for easy reference ・Email single calculations or complete history ・Swipe down to review previous work CUSTOMIZE EVERYTHING ・6 layouts including extra-large button options ・10 color themes plus Dark Mode ・Adjustable font size and bold text ・Left-handed mode ・Show or hide features you don't need SCIENTIFIC FUNCTIONS ・Full scientific calculator when needed ・Memory buttons with values displayed ・Percentage and backspace buttons ・Automatic scientific notation ・VoiceOver accessibility OPTIONAL IN APP PURCHASES ・Today View Widget (iOS 17 and below) ・Multiple History Tapes ADDITIONAL FEATURES ・Customizable button symbols and decimal settings ・Multiple backspace button styles ・iPad Split View and 3D Touch support ・Gesture controls for quick access URL Scheme: calculatorhdpro://
Screenshots
Verdict
The clearest difference is price: Calculator at Free against Calculator HD Pro's $9.99. Calculator also leads on in-app purchases (none vs 2). Calculator HD Pro's advantage is ads (none vs shown) and update cadence (every 2 months vs every 13 months). On rating, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Calculator is free to download; Calculator HD Pro costs $9.99 up front. Calculator HD Pro sells 2 one-off in-app purchases. Calculator asks for nothing beyond the download.
Calculator HD Pro holds the better App Store score, 4.8 against 4.7. That said, the two scores are not equally well evidenced: Calculator HD Pro has 11K ratings behind it against 916, so its average is the more settled of the two. Written reviews point the same way: 80% of Calculator's written reviews are positive against 95% of Calculator HD Pro's.
Calculator ships an update every 13 months, Calculator HD Pro every 2 months. The most recent releases landed on October 23, 2026 and October 29, 2026 respectively.
| Parameter | Calculator | Calculator HD Pro |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 4.7 (916 ratings) | 4.8 (11K ratings) — better |
| Positive reviews | 79.8% of reviews | 94.9% of reviews — better |
| Number of ratings | 916 | 11K — better |
| Update frequency | Every 13 months | Every 2 months — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.2 |
| Further details — not scored | ||
| Size | 11 MB | 48 MB |
| Age rating | 4+ | 4+ |
| Developer | Horizon Business, Inc. | Cider Software LLC |
Customer experience
Calculator
Calculator HD Pro
User reviews
Calculator
From 916 App Store ratingsWhat we love
- 💻 Easy to use
- 🎨 Colorful and visually appealing
- 👀 Large, easy-to-read numbers
- 🎯 Accurate calculations
- 🆓 Free app
Room to improve
- 🔊 Loud button clicking sound that can't be turned off
- 📏 Lacks landscape mode
- 🔢 No percentage or advanced math functions
Calculator HD Pro
From 11K App Store ratingsWhat we love
- 🚀 Significantly better than Apple's calculator
- 👍 Excellent app with great features
- 👍 Flawless app, very useful
- 👍 Fantastic calculator, meets all needs
- 👍 Best calculator app, highly recommended
Room to improve
- 🐛 Bothersome pop-up review requests
- 🐛 Cannot delete lists in history tapes
- 🐛 Repeated rate and review pop-ups
Bugs and requests
Calculator
Reported bugs
2 issues- Sound toggle switch doesn't work to turn off sounds
- App crashes or freezes on some devices
Requested features
3 requests- Add percentage and other advanced math functions
- Allow landscape mode
- Add option to turn off button sounds
Calculator HD Pro
Reported bugs
2 issues- Cannot delete lists in history tapes
- Ads still appear after purchasing full version
Requested features
3 requests- Add binary, decimal, and hex conversion
- Ability to manually sort result lines
- Add a tax calculation button
In-app purchases
Calculator
No in-app purchases
Calculator HD Pro
- Widget$1.99
- Multiple History Tapes$1.99
Questions
Is Calculator free?
Is Calculator HD Pro free?
Which has better reviews, Calculator or Calculator HD Pro?
Do Calculator or Calculator HD Pro have ads?
Which is updated more often, Calculator or Calculator HD Pro?
Other comparisons
