Calc vs Unit Converter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calc
A visually appealing and straightforward calculator app for iPhone and iPad. It offers a unique user interface with support for basic and scientific calculations, various number base conversions, and currency and unit conversions.
- Universal app for iPhone and iPad
- Basic and scientific calculations
- Number base conversions (decimal, hex, binary, octal)
- Currency and unit conversions
- Scrollable calculation history
- 10 color themes
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Calc is a beautiful simple tape calculator for your iPhone and iPad with a uniq user interface. Features: - universal App for your iPhone and iPad - Slide Over and Split View support - basic calculation - lots of scientific functions - decimal, hexadecimal, binary and octal conversion and calculations - currency conversion - uniq and easy percentage concept - unit conversions - scrollable calculation history - calculation history can be shared - 10 color themes Privacy Policy: https://apps.micw.org/pp.php Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Unit Converter
This utility app offers conversion for over 100 units across 18 categories, including length, mass, temperature, and digital storage. It supports a wide range of specific units within each category and provides a clean, ad-free interface for quick conversions.
- 18 unit categories
- Over 100 units supported
- Ad-free experience
- Supports multiple devices
- Pro version with free trial
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Support 18 categories of units, convert over 100+ units: - Angle: Degrees, Radians, Grad, Arcseconds, Arcminutes, Revolutions - Area: Mm², Square Kilometers, Square Meters, Square Centimeters, Mm², Μm², Nm², Square Inches, Square Feet, Square Yards, Square Miles, Acres, Ares, Hectares - Base: Binary, Octal, Decimal, Hexadecimal - Digital Storage: Bits, Bytes, Mib, Gib, Tib, Pib, Megabytes, Gigabytes, Terabytes, Petabytes - Electric Charge: C, Mah, Kah, Ah, Mah, Μah - Electric Potential Difference: Mv, Kv, Volts, Mv, Μv - Electric Resistance: Mω, Kω, Ohms, Mω, Μω - Energy: Kilojoules, Joules, Kilocalories, Calories, Kilowatt-Hours - Frequency: Thz, Gigahertz, Megahertz, Kilohertz, Hertz, Mhz, Μhz, Nhz - Fuel Efficiency: Liters Per 100 Kilometers, Miles Per Gallon, Miles Per Imp. Gallon - Length: Millimeters, Centimeters, Decimeters, Meters, Kilometers, Light Years, Inches, Feet, Yards, Miles - Mass: Kilograms, Grams, Dg, Cg, Milligrams, Micrograms, Ng, Pg, Ounces, Pounds, Stones, Metric Tons, Tons, Carats, Troy Ounces, Slug - Power: Tw, Gigawatts, Megawatts, Kilowatts, Watts, Milliwatts, Μw, Nw, Pw, Fw, Horsepower - Pressure: N/M², Gpa, Mpa, Kpa, Hectopascals, Inches Of Mercury, Bar, Millibars, Millimeters Of Mercury, Pounds-Force Per Square Inch - Speed: Kilometers Per Hour, Meters Per Second, Knots - Temperature: Degrees Celsius, Degrees Fahrenheit, Kelvins - Time (Duration): Milliseconds, Seconds, Minutes, Hours, Days, Weeks, Months, Years, Decade, Century - Volume: Megaliters, Kl, Liters, Deciliters, Centiliters, Milliliters, Cubic Kilometers, Cubic Meters, Dm³, Mm³, Cubic Inches, Cubic Feet, Cubic Miles Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: Unit Converter at 4.9 against Calc's 3.9. Unit Converter also leads on update cadence (every 9 days vs every 2 months) and review sentiment (100% vs 81%). Calc's advantage is monetization model (free vs freemium). On price, ratings volume, ads and in-app purchases 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. Calc sells 2 in-app purchases, starting at $0.99 per month and Unit Converter sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
Unit Converter holds the better App Store score, 4.9 against 3.9. Both are backed by a comparable volume of ratings — 28 and 17 respectively. Written reviews point the same way: 81% of Calc's written reviews are positive against 100% of Unit Converter's.
Calc ships an update every 2 months, Unit Converter every 9 days. The most recent releases landed on September 20, 2026 and June 10, 2026 respectively.
| Parameter | Calc | Unit Converter |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (28 ratings) | 4.9 (17 ratings) — better |
| Positive reviews | 80.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 28 — better | 17 |
| Update frequency | Every 2 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac, Vision Pro — better |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Mike Wesemann | ZIJIAN CHEN |
Customer experience
Calc
Unit Converter
Bugs and requests
Calc
Reported bugs
2 issues- Percentage calculations not working correctly
- Cos 90 showing incorrect result
Requested features
6 requests- Copy and paste support
- Larger buttons for easier use
- Ability to clear calculation history
- Auto-insert previous result when using operators
- Landscape mode support
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- Formatting for large numbers (e.g. 1,000,000)
Unit Converter
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Calc
- Calc Pro$0.991 Month
- Calc Pro$4.991 Year
Unit Converter
- Pro Version (1 Month)14 Days trial$0.991 Month
- 1 cup of orange juice.$0.99
- 1 litre of orange juice.$2.99
- Pro Version (Lifetime)$3.99
