Comparison

Jumbo Calculator vs Calculator Smart

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Large, easy-to-read buttons
  • Swipe for backspace
  • Double tap to copy/paste
  • Landscape mode calculator
  • VoiceOver support
Read full description

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.

About

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.

Highlights
  • 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
Features
Read full description

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

Calculator Smart4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Calculator Smart sells 3 one-off in-app purchases. Jumbo Calculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard9 real differences · 1 level
Jumbo Calculator versus Calculator Smart: the parameters behind the verdict, then further details
ParameterJumbo CalculatorCalculator Smart
PriceFreeFree
Rating3.6 (78 ratings)4.7 (494 ratings) — better
Positive reviews49.6% of reviews — better36.4% of reviews
Number of ratings78494 — better
Update frequencyMonthly — betterEvery 4 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPadiPhone, iPad, iPod, Mac, Apple TV, Apple Watch — better
Requires iOS9.3 — better13.0
Further details — not scored
Size23 MB24 MB
Age rating4+4+
DeveloperChristopher WeemsMiroslav Otsedarski

Customer experience

Jumbo Calculator

All ratings78 ratings
Positive60.3%
Neutral10.3%
Negative29.5%
Written reviews250 reviews
Positive49.6%
Neutral11.6%
Negative38.8%

Calculator Smart

All ratings494 ratings
Positive93.1%
Neutral1.2%
Negative5.7%
Written reviews22 reviews
Positive36.4%
Neutral27.3%
Negative36.4%

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

None

Jumbo Calculator

No in-app purchases

3 purchases

Calculator Smart

One-time3
  • Colorful Skins and Remove Ads$1.99
  • Colorful Skins$1.99
  • Colorful Skins for Mac app$1.99

Questions

Is Jumbo Calculator free?
Jumbo Calculator is free to download, with no in-app purchases.
Is Calculator Smart free?
Calculator Smart is free to download, with in-app purchases available.
Which has better reviews, Jumbo Calculator or Calculator Smart?
Calculator Smart is rated higher. Jumbo Calculator averages 3.6 out of 5 from 78 ratings, while Calculator Smart averages 4.7 from 494 ratings.
Do Jumbo Calculator or Calculator Smart have ads?
Calculator Smart shows ads; Jumbo Calculator does not.
Which is updated more often, Jumbo Calculator or Calculator Smart?
Jumbo Calculator ships an update monthly, and Calculator Smart every 4 months. Most recently, Jumbo Calculator was updated on October 16, 2026 and Calculator Smart on October 20, 2026.

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