Calculator Smart vs Accurity
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!
Accurity
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This app must be used with the Accurity™ unit for hydrogen measurement in liquid aluminium. It can't be used by itself if the iPad is not connected to a unit. The Accurity™ app provides a great user interface for the operation of the Accurity™ unit. The app allows the user to start measurements and manage the data. It also gives very useful information for the unit operation when required.
Screenshots
Verdict
The clearest difference is price: Calculator Smart at Free against Accurity's $89.99. Calculator Smart also leads on device support (6 vs 1) and iOS requirement (13.0 vs 16.0). Accurity's advantage is in-app purchases (none vs 3) and ads (none vs shown). On update cadence 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 Smart is free to download; Accurity costs $89.99 up front. Calculator Smart sells 3 one-off in-app purchases. Accurity asks for nothing beyond the download.
Calculator Smart ships an update every 4 months, Accurity every 2 months. The most recent releases landed on September 12, 2026 and June 11, 2026 respectively.
| Parameter | Calculator Smart | Accurity |
|---|---|---|
| Price | Free — better | $89.99 |
| Rating | 4.7 (494 ratings) — better | — |
| Positive reviews | 36.4% of reviews | — |
| Number of ratings | 494 — better | — |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Mac, Apple TV, Apple Watch — better | iPad |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 24 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Miroslav Otsedarski | Alsobia inc. |
In-app purchases
Calculator Smart
- Colorful Skins and Remove Ads$1.99
- Colorful Skins$1.99
- Colorful Skins for Mac app$1.99
Accurity
No in-app purchases
