All Unit Conversion vs Conversion Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Length conversion
- Area conversion
- Volume conversion
- Mass conversion
- Time conversion
- Currency conversion
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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
Conversion Calculator
This utility app offers a comprehensive unit conversion tool for various needs, including cooking, travel, and work. It supports over 120 units across 15 categories, with metric and imperial options. The app works offline and allows for customization of displayed decimals and category order.
- 15 categories and 120+ units
- Metric and imperial conversions
- Cooking, weight, length, temperature, and more
- Offline functionality
- Customizable decimal display
- Apple Watch app
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Convert cooking measurements, kg to lbs, feet to meters, Celsius to Fahrenheit and psi to bar in a tap. Conversion Calculator is a fast, clean unit converter for the kitchen, travel, the gym, school and work. COOKING & KITCHEN • Cups, tablespoons, teaspoons, fluid ounces, pints, quarts and gallons • US and imperial (UK) cups, pints and gallons kept separate, so recipes come out right • Grams, ounces and pounds for baking WEIGHT & BODY • kg to lbs, stones, ounces, grams and milligrams LENGTH, AREA & LAND • Feet, inches, meters, cm, miles, km, yards and nautical miles • Square feet, square meters, acres and hectares TEMPERATURE, SPEED & MORE • Celsius, Fahrenheit and Kelvin • km/h, mph, knots and m/s • Energy: calories, kcal, joules and kWh • Data: bytes, KB, MB, GB and TB • Time: seconds to hours PRESSURE, FUEL, POWER & MORE • Pressure: psi, bar, kPa, atm, mmHg and inHg • Fuel economy: mpg (US and UK), L/100 km and km/L • Power: horsepower (hp), kW and watts • Torque: N·m, lbf·ft and kgf·m • Force: newtons, lbf and kgf • Angle: degrees, radians and gradians MADE FOR EVERYDAY USE • 15 categories and 120+ units, metric and imperial • Swap units in one tap and copy the result • Reorder categories so the ones you use are on top, or hide the rest with Pro • Choose how many decimals to show • Apple Watch app for conversions on your wrist • Works offline Converting is free. Pro is an optional one-time purchase.
Screenshots
Verdict
All Unit Conversion and Conversion Calculator both sit at 4.8 stars, but that hides the real split: 100% of Conversion Calculator's written reviews are positive against 50% of All Unit Conversion's. Conversion Calculator also leads on ratings volume (165 vs 29) and device support (3 vs 1). All Unit Conversion's advantage is in-app purchases (none vs 1). On price, rating, 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
Both are free to download. Conversion Calculator sells 1 one-off in-app purchase. All Unit Conversion asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.8 for All Unit Conversion against 4.8 for Conversion Calculator. That said, the two scores are not equally well evidenced: Conversion Calculator has 165 ratings behind it against 29, so its average is the more settled of the two. Written reviews are what separate them: 50% of All Unit Conversion's written reviews are positive against 100% of Conversion Calculator's.
All Unit Conversion ships an update every 2 months, Conversion Calculator every 5 weeks. The most recent releases landed on November 2, 2026 and November 8, 2026 respectively.
| Parameter | All Unit Conversion | Conversion Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (29 ratings) | 4.8 (165 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 29 | 165 — better |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad, Apple Watch — better |
| Requires iOS | 16.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 22 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Tiago Do Couto | Collins Cheruiyot |
Customer experience
All Unit Conversion
Conversion Calculator
In-app purchases
All Unit Conversion
No in-app purchases
Conversion Calculator
- Unlimited access forever$8.99
Questions
Is All Unit Conversion free?
Is Conversion Calculator free?
Which has better reviews, All Unit Conversion or Conversion Calculator?
Do All Unit Conversion or Conversion Calculator have ads?
Which is updated more often, All Unit Conversion or Conversion Calculator?
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