Calculator Smart vs CompSci Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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!
CompSci Calculator
Perform calculations and conversions between decimal, hexadecimal, and binary bases in real-time. Ideal for programmers and computer scientists, it offers simultaneous display of values across all three modes and supports bitwise operations and complements.
- Decimal, hexadecimal, and binary base calculations
- Real-time simultaneous conversion
- Basic algebra between bases
- Selectable bit size (8, 16, 24, 32)
- Bitwise functions
- 1's and 2's complements
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CompSci Calculator lets you calculate in three different bases: decimal, hexadecimal, and binary. CompSci Calculator was developed for programmers, developers, computer engineers, and computer scientists. In real time you can do part of an equation in one base and then switch to another and complete the equation. As you type in any particular base the values in all three modes are displayed together. Because of the real time instant conversion between the bases CompSci Calculator also serves as an excellent conversion tool. Features: -basic algebra between bases -simultaneous answers in all three bases -selectable bit size: 8,16,24,32 -optional additional 16 bits of radix point precision -bitwise functions -1's and 2's complements -shift left and shift right Student and teacher feedback is very appreciated!
Screenshots
Verdict
The clearest difference is in-app purchases: CompSci Calculator at none against Calculator Smart's 3. CompSci Calculator also leads on update cadence (every 3 days vs every 4 months) and review sentiment (63% vs 36%). Calculator Smart's advantage is rating (4.7 vs 4.4) and ratings volume (498 vs 42). On price and ads 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. CompSci Calculator asks for nothing beyond the download.
Calculator Smart holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Calculator Smart has 498 ratings behind it against 42, so its average is the more settled of the two. Written reviews complicate that: 36% of Calculator Smart's written reviews are positive against 63% of CompSci Calculator's, so the app with the better star average is not the one people write more warmly about.
Calculator Smart ships an update every 4 months, CompSci Calculator every 3 days. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | Calculator Smart | CompSci Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (498 ratings) — better | 4.4 (42 ratings) |
| Positive reviews | 36.4% of reviews | 62.5% of reviews — better |
| Number of ratings | 498 — better | 42 |
| Update frequency | Every 4 months | Every 3 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod, Mac, Apple TV, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 24 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | Miroslav Otsedarski | Corey Smith |
Customer experience
Calculator Smart
CompSci Calculator
In-app purchases
Calculator Smart
- Colorful Skins and Remove Ads$1.99
- Colorful Skins$1.99
- Colorful Skins for Mac app$1.99
CompSci Calculator
No in-app purchases
Questions
Is Calculator Smart free?
Is CompSci Calculator free?
Which has better reviews, Calculator Smart or CompSci Calculator?
Do Calculator Smart or CompSci Calculator have ads?
Which is updated more often, Calculator Smart or CompSci Calculator?
Other comparisons
