Comparison

The Converter vs All Unit Conversion

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

Head to head
About

The Converter

This app offers a comprehensive unit and currency converter with over 1500 units across 65 categories. It features advanced search, customization, and two conversion modes for convenience, performing calculations as you type.

Highlights
  • 1500+ units across 65 categories
  • Advanced search and customization
  • Standard and Expanded conversion modes
  • Conversions performed as you type
  • Supports over 180 countries for currency
Features
Read full description

Unit and Currency Converter. Forget about boring converters. The Converter was designed not just for work, but also for pleasure: you can do the same tedious conversions, but with much more fun! And as for work: The Converter comes with more than 1500 units across 65 categories. By using advanced search and customization capabilities, you'll be able to arrange the information relevant to you for your total convenience. Two modes are available - Standard: only "to" and "from" units are shown, and Expanded: multiple units are shown on the same screen. In both modes conversions are performed as you type. Please look at the Screenshots to get an idea. Available measurements: Length, Area, Volume, Speed, Weight, Temperature, Currency (more than 180 countries), Clothing, Fuel Consumption, Data Storage, Data Transfer, Kitchen, Force, Energy, Power, Pressure, Time, Torque, Acceleration, Angle, Prefixes, Luminance, Charge, Current, Density, Sound, Fractions, Concentration Molar, Concentration Solution, Electric Conductance, Electric Conductivity, Electric Field Strength, Electric Potential, Electric Resistance, Electric Resistivity, Electrostatic Capacitance, Flow Mass, Flow Molar, Heat Density, Heat Flux Density, Heat Transfer Coefficient, Inductance, Linear Charge Density, Linear Current Density, Magnetic Field Strength, Magnetic Flux, Magnetic Flux Density, Magnetomotive Force, Mass Flux Density, Moment of Force, Moment of Inertia, Permeability, Radiation Absorbed Dose, Radiation Activity, Radiation Exposure, Surface Charge Density, Surface Current Density, Surface Tension, Thermal Conductivity, Thermal Expansion, Thermal Resistance, Viscosity Dynamic, Viscosity Kinematic, Volume Charge Density. For feedback and support: vladimir@kofman.com

About

All Unit Conversion

Easily convert between various units of measurement with this free utility app. It supports conversions for length, area, volume, mass, time, digital storage, energy, and currency.

Highlights
  • Length conversion
  • Area conversion
  • Volume conversion
  • Mass conversion
  • Time conversion
  • Currency conversion
Features
Read full description

This is a simple and useful free unit converter - Length Converter - Area Converter - Volume Converter - Mass Converter - Time Converter - Digital Storage Converter - Energy Converter - Currency Converter

Screenshots

The Converter4 screens
All Unit Conversion4 screens

Verdict

The call

The clearest difference is in-app purchases: All Unit Conversion at none against The Converter's 1. All Unit Conversion also leads on rating (4.8 vs 4.5). The Converter's advantage is review sentiment (75% vs 50%) and device support (3 vs 1). On price, ratings volume, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. The Converter sells 1 one-off in-app purchase. All Unit Conversion asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

All Unit Conversion holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 21 and 29 respectively. Written reviews complicate that: 75% of The Converter's written reviews are positive against 50% of All Unit Conversion's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

The Converter ships an update every 6 weeks, All Unit Conversion every 2 months. Both last shipped on October 24, 2026.

Scorecard6 real differences · 4 level
The Converter versus All Unit Conversion: the parameters behind the verdict, then further details
ParameterThe ConverterAll Unit Conversion
PriceFreeFree
Rating4.5 (21 ratings)4.8 (29 ratings) — better
Positive reviews75.3% of reviews — better50.0% of reviews
Number of ratings2129 — better
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS7.0 — better16.6
Further details — not scored
Size12 MB22 MB
Age rating4+4+
DeveloperVladimir KofmanTiago Do Couto

Customer experience

The Converter

All ratings20 ratings
Positive90.0%
Neutral5.0%
Negative5.0%
Written reviews489 reviews
Positive75.3%
Neutral7.0%
Negative17.8%

All Unit Conversion

All ratings17 ratings
Positive94.1%
Neutral0.0%
Negative5.9%
Written reviews4 reviews
Positive50.0%
Neutral25.0%
Negative25.0%

In-app purchases

1 purchases

The Converter

One-time1
  • Remove Ads$0.99
None

All Unit Conversion

No in-app purchases

Questions

Is The Converter free?
The Converter is free to download, with in-app purchases available.
Is All Unit Conversion free?
All Unit Conversion is free to download, with no in-app purchases.
Which has better reviews, The Converter or All Unit Conversion?
All Unit Conversion is rated higher. The Converter averages 4.5 out of 5 from 21 ratings, while All Unit Conversion averages 4.8 from 29 ratings.
Do The Converter or All Unit Conversion have ads?
Neither The Converter nor All Unit Conversion shows ads.
Which is updated more often, The Converter or All Unit Conversion?
The Converter ships an update every 6 weeks, and All Unit Conversion every 2 months. Most recently, The Converter was updated on October 24, 2026 and All Unit Conversion on October 24, 2026.

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