Comparison

UnitConverter byNSDev vs Unit Converter All Categories

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

UnitConverter byNSDev

This tool converts between 26 different types of units, displaying conversion rates and allowing you to specify decimal places. It supports a vast array of units across categories like length, mass, volume, and more.

Highlights
  • Converts 26 types of units
  • Displays conversion rates
  • Customizable decimal places
  • Supports numerous units in various categories
  • User-submitted unit requests
Features
Read full description

Tool to convert each of 26 types of units. When you select a unit of value that you enter, you create a table to calculate all the other units. It also displays the conversion rate. You can also specify the number of decimal places. 23 units in Length 18 units in Area 31 units in Volume 15 units in Mass 5 units in Angle 4 units in Temperature 7 units in Time 3 units in Frequency 5 units in Force 17 units in Pressure 6 units in Energy 6 units in Power rate 13 units in Speed 14 units in Acceleration 2 units in Dynamic viscosity 4 units in Kinematic viscosity 3 units in Magnetic flux density 2 units in Magnetic flux 7 units in Luminance 4 units in Illuminance 3 units in Radiation - source activity 2 units in Radiation - absorbed dose 2 units in Radiation - equivalent dose 2 units in Radiation - exposure 7 units in Infomation 7 units in Resolution Because we want to support units around the world, We will wait for the name and unit conversion information. Please enter your review.

About

Unit Converter All Categories

Features
Read full description

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 β€” 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 β€” No internet needed Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

UnitConverter byNSDev3 screens
Unit Converter All Categories4 screens

Verdict

The call

The clearest difference is in-app purchases: UnitConverter byNSDev at none against Unit Converter All Categories's 3. Unit Converter All Categories's advantage is update cadence (every 5 weeks vs every 5 months). On price, ads, device support and iOS requirement 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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Unit Converter All Categories sells 3 in-app purchases, starting at $0.99 per month. UnitConverter byNSDev asks for nothing beyond the download.

UpkeepUpdate frequency

UnitConverter byNSDev ships an update every 5 months, Unit Converter All Categories every 5 weeks. The most recent releases landed on October 21, 2026 and October 30, 2026 respectively.

Scorecard2 real differences Β· 6 level
UnitConverter byNSDev versus Unit Converter All Categories: the parameters behind the verdict, then further details
ParameterUnitConverter byNSDevUnit Converter All Categories
PriceFreeFree
Positive reviews20.0% of reviewsβ€”
Update frequencyEvery 5 monthsEvery 5 weeks β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
MonetizationFreeβ€”
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS15.6 β€” better16.6
Further details β€” not scored
Size4 MB12 MB
Age rating4+4+
DeveloperNIHON SYSTEM DEVELOPER CORPORATIONVladislav Zhirnov

In-app purchases

None

UnitConverter byNSDev

No in-app purchases

3 purchases

Unit Converter All Categories

Subscriptions2
  • Full version / monthly$0.991 Month
  • Full version / year$2.991 Year
One-time1
  • Remove ADS$4.99

Questions

Is UnitConverter byNSDev free?
UnitConverter byNSDev is free to download, with no in-app purchases.
Is Unit Converter All Categories free?
Unit Converter All Categories is free to download, with in-app purchases available.
Do UnitConverter byNSDev or Unit Converter All Categories have ads?
Neither UnitConverter byNSDev nor Unit Converter All Categories shows ads.
Which is updated more often, UnitConverter byNSDev or Unit Converter All Categories?
UnitConverter byNSDev ships an update every 5 months, and Unit Converter All Categories every 5 weeks. Most recently, UnitConverter byNSDev was updated on October 21, 2026 and Unit Converter All Categories on October 30, 2026.

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