CalcSpark vs Unit Converter Pro
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
CalcSpark
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CalcSpark brings essential calculation tools together in one streamlined app. Features: β’ Standard calculator for everyday math β’ Scientific calculator with trigonometric functions, logarithms, powers, roots, and factorial β’ Programmer calculator with binary, octal, decimal, hexadecimal, bitwise operations, shifts, and modulo β’ Unit converter for length, area, volume, temperature, weight, time, angle, speed, pressure, power, and energy β’ Date calculator for date differences and adding or subtracting time β’ Calculation history for quick reuse β’ Clean layout optimized for both iPhone and iPad CalcSpark is designed to stay fast, clear, and practical for daily use.
Unit Converter Pro
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The Ultimate Universal Unit Converter: 1200+ Units, 100+ Categories. Why settle for a basic converter when you can have the entire history and science of measurement in your pocket? Unit Converter Pro is a commercial-grade tool designed for engineers, students, designers, travelers, and curious minds. From the dawn of civilization to the frontiers of subatomic physics, we cover it all. KEY FEATURES: βΆ 100+ DIVERSE CATEGORIES β’ Foundational: Length, Weight, Area, Volume, Speed, Time. β’ Professional Engineering: Pressure, Force, Torque, Thermal Conductivity, Specific Entropy, Viscosity. β’ Tech & Design: HSL/HSV Color Spaces, Hex, RGB, Unix Timestamps, Pixel Density (PPI), Aspect Ratio, Digital Storage. β’ Scientific Mastery: Molar Energy, Magnetic Flux, Electric Field Strength, Radiation (Sievert/Gray), Chemical Amount (Moles). β’ Global Lifestyle: International Shoe & Clothing Sizes (US, UK, EU, JP), Bra Sizes, Jewelry Karat, Dog Years, BMI Calculator. β’ Historical Encyclopedia: Ancient Sumerian, Egyptian, Maya, Aztec, Chinese, Japanese, Indian, Roman, Greek, Persian, and Norse units. βΆ DESIGNED FOR ACCURACY β’ High-Precision Math: Advanced algorithms for non-linear scales (Beaufort Wind Scale, Baking Gas Marks). β’ Smart Formatting: Supports fractions, percentages, and complex numeric bases (Binary, Octal, Hexadecimal). β’ Smart Input: Automatically switches between numeric and text keyboards based on the unit type. βΆ ELITE USER EXPERIENCE β’ Ultra-Fast Search: Find any category or unit instantly with real-time filtering. β’ History & Bookmarks: Save your frequent conversions and access your last 50 records. β’ Modern Material 3 UI: A beautiful, responsive interface with smooth animations and full Dark Mode support. β’ Quick Actions: Copy to clipboard, share results, or swap units with a single tap. βΆ GLOBAL & OFFLINE β’ Currency Reference: Quick access to major global currency rates. β’ 100% Offline: Core conversion logic works anywhere, anytimeβno internet required. β’ Privacy First: We donβt collect your personal data. Whether you are baking a cake, designing a mobile app, calculating thermodynamic entropy, or studying ancient Mesopotamian ruins, Unit Converter Pro provides the precision you need. Download the world's most comprehensive conversion tool today!
Screenshots
Verdict
The clearest difference is update cadence: Unit Converter Pro at every 3 days against CalcSpark's every 2 months. Unit Converter Pro also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
CalcSpark ships an update every 2 months, Unit Converter Pro every 3 days. The most recent releases landed on November 5, 2026 and October 28, 2026 respectively.
| Parameter | CalcSpark | Unit Converter Pro |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 3 days β better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod β better | iPhone, iPod |
| Requires iOS | 15.0 | 13.0 β better |
| Further details β not scored | ||
| Size | 6 MB | 188 MB |
| Age rating | 4+ | 4+ |
| Developer | ε ΅η ι | Zehras Ahmele |
In-app purchases
CalcSpark
No in-app purchases
Unit Converter Pro
No in-app purchases









