Calculator 3.0 vs Calculator Smart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator 3.0
A free, redesigned calculator app offering a simpler, more intuitive experience across Apple devices. Features include customizable themes, advanced scientific functions, and unit conversion, all optimized for various screen sizes and interactions.
- Customizable themes
- Scientific calculator
- Unit converter
- Tip calculator
- Tally counter
- iPad multitasking support
- Apple Watch complications
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Welcome to Calculator 3.0 for Apple Watch, iPhone, iPad, and iMessage! Frustrated with the ugly and complicated Calculators for iPad, Apple Watch, and Apple TV — Calculator 3.0 was created to provide a better simpler choice....all for Free. The "Original Calculator with Themes for iPad and Apple Watch" is back — Rewritten and redesigned for Apple Watch, iPhone, iPad, and iMessage with Bolder Fonts, iPad Multitasking, Native Watch Support with Complications, and Snappier Performance. Apple Watch The Apple Watch Calculator with Colored Watch Band Themes! Designed for the mobile mathematician with a Scientific Calculator, Tip Calculator, Unit Converter, a Tally Counter, Twenty-Six personalized colored themes for your watch band or style, and... • Force Press (firmly press) on the Calculator to changes themes • Big and bold fonts for readability • Haptic feedback upon button presses • Watch Face Complication support for quick access • Tip Calculator with Digital Crown support • Conversion Calculator with Length, Weight, Volume, Area, and Time units • Counter, Tap to increase or use the Digital Crown for faster input, force press for options • Settings, with option to enable Counter number modular face complication support • Autorotation to Share, when enabled the app rotates when rotating your wrist to show a calculation, tip percentage, unit conversion, or tally number to another person iPhone and iPad • Simple bubble dark interface with Scientific Calculator • iPad Multitasking Support (Landscape and Portrait) • Haptic feedback upon button presses (iPhone 7 and greater) • Gesture Controls, Swipe Up for "Light Mode", Swipe Down for "Dark Mode", Swipe Left to clear the displayed number • 3D Touch Icon — Copy Last Number (iPhone 6s and greater) • Bolder fonts • Tap number to copy • "Drag and Drop" support for iPad, perfect for iPad Multitasking - Tap and hold on the displayed number to select for dragging as text into another app - Drag and Drop text numbers from other apps (Mail, Safari, Notes, etc) over the displayed number area to include the number in the current input iMessage app • Simple Calculator • Tap number to paste into message thread
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 ads: Calculator 3.0 at none against Calculator Smart's shown. Calculator 3.0 also leads on review sentiment (67% vs 36%) and update cadence (fortnightly vs every 4 months). On price, rating, in-app purchases and device support 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 3.0 sells 3 one-off in-app purchases and Calculator Smart sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.7 for Calculator 3.0 against 4.7 for Calculator Smart. That said, the two scores are not equally well evidenced: Calculator 3.0 has 3.5K ratings behind it against 494, so its average is the more settled of the two. Written reviews are what separate them: 67% of Calculator 3.0's written reviews are positive against 36% of Calculator Smart's.
Calculator 3.0 ships an update fortnightly, Calculator Smart every 4 months. Both last shipped on October 20, 2026.
| Parameter | Calculator 3.0 | Calculator Smart |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3.5K ratings) | 4.7 (494 ratings) |
| Positive reviews | 66.7% of reviews — better | 36.4% of reviews |
| Number of ratings | 3.5K — better | 494 |
| Update frequency | Fortnightly — better | Every 4 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Apple TV, Apple Watch | iPhone, iPad, iPod, Mac, Apple TV, Apple Watch — better |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 26 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Spencer Brown | Miroslav Otsedarski |
Customer experience
Calculator 3.0
Calculator Smart
Bugs and requests
Calculator 3.0
Reported bugs
3 issues- Incorrect calculation results
- Landscape mode issues
- Crashes after updates
Requested features
4 requests- Add memory function indicator
- Allow disabling of button click sounds
- Optimize layout for iPad
- Improve graphics quality
Calculator Smart
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Calculator 3.0
- a Nice Tip$0.99
- a Generous Tip$2.99
- an Amazing Tip!$4.99
Calculator Smart
- Colorful Skins and Remove Ads$1.99
- Colorful Skins$1.99
- Colorful Skins for Mac app$1.99
Questions
Is Calculator 3.0 free?
Is Calculator Smart free?
Which has better reviews, Calculator 3.0 or Calculator Smart?
Do Calculator 3.0 or Calculator Smart have ads?
Which is updated more often, Calculator 3.0 or Calculator Smart?
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