Jumbo Calculator vs Calculator Smart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Jumbo Calculator
This app offers a straightforward large-button calculator experience, ideal for quick calculations. It includes intuitive gestures for editing and accessibility features like VoiceOver support.
- Large, easy-to-read buttons
- Swipe for backspace
- Double tap to copy/paste
- Landscape mode calculator
- VoiceOver support
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Jumbo Calculator is the super simple large-buttoned calculator for everyone. While you can't feel the exquisite texture of its large plastic buttons (and the included solar panel doesn't actually charge your battery), Jumbo Calculator succeeds at its main purposes: adding, subtracting, multiplying, and dividing. Features: · Easy to read and find buttons (you might be able to touch type on a touchscreen). · Simple gestures for backspace (swipe the calculator screen) and copy & paste (double tap). · A smaller version of the calculator in landscape for when you're too tired to stretch your fingers. · VoiceOver support for blind and low-vision users.
Calculator Smart
This app offers a powerful and precise calculator for everyday math and advanced scientific computations. It features a clean interface with large buttons, supporting complex equations, multiple modes, and intuitive input methods. Personalize your experience with colorful skins and custom icons.
- 30+ scientific operations
- Degrees and Radians support
- Parentheses and nested equations
- Intuitive input with slide-to-delete
- Copy & Paste results
- Apple Watch app and Lock Screen Widget
- Colorful skins and custom icons
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Calculator Smart is the most powerful and precise calculator for iPhone, iPad, and Apple Watch — built for everyday math and advanced scientific computations alike. Whether you need a quick percentage or a complex nested equation with parentheses, Calculator Smart handles it all with a clean, modern interface and lightning-fast big buttons. Scientific & Standard Modes • 30+ scientific operations including trigonometry, logarithms, and more • Degrees and Radians support • Parentheses and nested parentheses for complex equations • Output in Decimal or Scientific Notation (mantissa/exponent) Intuitive Input • Slide to delete wrong digits instantly • Double-tap or long-press to Copy & Paste results • Full External Keyboard support (Bluetooth & Smart Keyboard) • Three-digit grouping with locale-specific decimal and thousands separators Cross-Platform & Widgets • Apple Watch app with Complication shortcuts • Lock Screen Widget — calculate without unlocking your device • Messages Extension — share results directly in conversations • Multitasking: Slide Over and Split View (iPad) Personalization • Colorful skins to match your style • Custom App Icons that match your chosen skin • Button sound feedback for a satisfying tactile feel Universal Purchase — buy once, use on all your Apple devices. Download Calculator Smart for FREE today!
Screenshots
Verdict
The clearest difference is rating: Calculator Smart at 4.7 against Jumbo Calculator's 3.6. Calculator Smart also leads on ratings volume (494 vs 78) and device support (6 vs 1). Jumbo Calculator's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price 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
Both are free to download. Calculator Smart sells 3 one-off in-app purchases. Jumbo Calculator asks for nothing beyond the download.
Calculator Smart holds the better App Store score, 4.7 against 3.6. That said, the two scores are not equally well evidenced: Calculator Smart has 494 ratings behind it against 78, so its average is the more settled of the two. Written reviews complicate that: 50% of Jumbo Calculator's written reviews are positive against 36% of Calculator Smart's, so the app with the better star average is not the one people write more warmly about.
Jumbo Calculator ships an update monthly, Calculator Smart every 4 months. The most recent releases landed on October 16, 2026 and October 20, 2026 respectively.
| Parameter | Jumbo Calculator | Calculator Smart |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (78 ratings) | 4.7 (494 ratings) — better |
| Positive reviews | 49.6% of reviews — better | 36.4% of reviews |
| Number of ratings | 78 | 494 — better |
| Update frequency | Monthly — better | Every 4 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPad | iPhone, iPad, iPod, Mac, Apple TV, Apple Watch — better |
| Requires iOS | 9.3 — better | 13.0 |
| Further details — not scored | ||
| Size | 23 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Christopher Weems | Miroslav Otsedarski |
Customer experience
Jumbo Calculator
Calculator Smart
Bugs and requests
Jumbo Calculator
Reported bugs
2 issues- Decimal point sometimes not recognized
- Pos/Neg function not always working as expected
Requested features
4 requests- Add percentage button
- Implement scientific calculator mode
- Include memory functions
- Add option to dim display by covering solar panel
Calculator Smart
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Jumbo Calculator
No in-app purchases
Calculator Smart
- Colorful Skins and Remove Ads$1.99
- Colorful Skins$1.99
- Colorful Skins for Mac app$1.99
Questions
Is Jumbo Calculator free?
Is Calculator Smart free?
Which has better reviews, Jumbo Calculator or Calculator Smart?
Do Jumbo Calculator or Calculator Smart have ads?
Which is updated more often, Jumbo Calculator or Calculator Smart?
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