Smart Unit Conversion vs Unit Converter All Categories
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Smart Unit Conversion
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This is a smart unit convertor that: 1. Support 21 languages and the Local Units 2. You can Customize the Sequence of Units 3. European number format supported Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Unit Converter All Categories
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Universal Unit Converter is the ultimate all-in-one conversion tool for professionals, students, and everyday users. Whether you're solving homework problems, performing engineering calculations, or managing tasks in the lab or workshop, this app has everything you need in one beautifully organized interface. With over 70 converters spread across 8 specialized categories, this app helps you convert almost anything โ from simple length and weight to advanced thermal resistance, magnetism, radiation, and more. Main Categories & Features Common Converters Quickly convert essential everyday values like: Length Weight and Mass Volume Temperature Area Pressure Energy Speed Data Storage Time, Power, Force, and more Engineering Tools Perfect for students and professionals in mechanical or civil engineering: Angular velocity & acceleration Density & specific volume Moment of inertia Torque & force moments Heat and Thermal Systems Handle all thermal analysis needs with: Thermal conductivity Specific heat capacity Thermal resistance Heat transfer coefficient Fuel efficiency (mass & volume) Fluid Dynamics Explore various physical and chemical properties in: Flow rates (volume, mass, molar) Viscosity (dynamic & kinematic) Concentration & permeability Surface tension Light and Optics Calculate optical parameters with: Luminance Illumination Light frequency & wavelength Digital image resolution Electricity Designed for electrical engineers and electronics enthusiasts: Current, voltage, resistance Capacitance & inductance Conductance, conductivity, and resistivity Electric field strength & charge density Magnetism Convert key magnetic quantities: Magnetic field strength Magnetic flux & flux density Magnetomotive force Radiology and Radiation Medical and scientific users can convert: Radiation exposure (Gy, Bq, C/kg) Absorbed dose & activity Why Choose Universal Unit Converter? Clean and intuitive UI with categorized converters Accurate conversion formulas used by professionals Offline mode โ No internet needed Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: Unit Converter All Categories at none against Smart Unit Conversion's shown. Unit Converter All Categories also leads on update cadence (every 5 weeks vs every 15 months). Smart Unit Conversion's advantage is iOS requirement (13.4 vs 16.6). On price, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Smart Unit Conversion sells 1 in-app purchase, starting at $1.99 per year and Unit Converter All Categories sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
Smart Unit Conversion ships an update every 15 months, Unit Converter All Categories every 5 weeks. Both last shipped on November 7, 2026.
| Parameter | Smart Unit Conversion | Unit Converter All Categories |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 15 months | Every 5 weeks โ better |
| Ads | Yes | No โ better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPad |
| Requires iOS | 13.4 โ better | 16.6 |
| Further details โ not scored | ||
| Size | 41 MB | 12 MB |
| Age rating | 17+ | 4+ |
| Developer | Yui Lau | Vladislav Zhirnov |
In-app purchases
Smart Unit Conversion
- 1 Year$1.991 Year
Unit Converter All Categories
- Full version / monthly$0.991 Month
- Full version / year$2.991 Year
- Remove ADS$4.99
Questions
Is Smart Unit Conversion free?
Is Unit Converter All Categories free?
Do Smart Unit Conversion or Unit Converter All Categories have ads?
Which is updated more often, Smart Unit Conversion or Unit Converter All Categories?
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