Comparison

Conversion! vs Inches and Millimeters

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

Head to head
About

Conversion!

Features
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Unit Converter – Fast, Accurate and Easy to Use Unit Converter is the perfect companion for quickly and accurately converting a wide variety of units. Whether you're at home, at work, in school, at university, or on the go, the app provides reliable results with an intuitive and easy-to-use interface. Features • Fast and precise unit conversions • Clean and intuitive user interface • Instant calculations while typing • Wide range of conversion categories • High calculation accuracy • Perfect for everyday use, education, engineering and professional work • Optimized for both iPhone and iPad • Simple, fast and efficient operation Available Categories Depending on the version, the app includes many conversion categories such as: • Length • Area • Volume • Weight • Speed • Temperature • Pressure • Energy • Power • Time • Angle • Digital Storage • Force • Density • Frequency • Currency and many more. Whether you need a quick conversion for everyday life or accurate engineering calculations, Unit Converter gives you reliable results in seconds.

About

Inches and Millimeters

Features
Read full description

The INCHES AND MILLIMETERS app is a handy tool that helps you convert between the two length units, inches and millimeters. The app has a simple and easy-to-use interface, simply enter the value you want to convert and the app will automatically calculate the result. FEATURES: Converts from inches to millimeters and vice versa Simple and easy-to-use interface Quick and accurate calculations Easy to share the results Supports multiple number formats Supports multiple languages Download the app today and start converting length units easily!

Screenshots

Conversion!4 screens
Inches and Millimeters4 screens

Verdict

The call

The clearest difference is price: Conversion! at Free against Inches and Millimeters's $0.99. Inches and Millimeters's advantage is iOS requirement (13.0 vs 26.0). On update cadence, ads, in-app purchases and device support 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

Conversion! is free to download; Inches and Millimeters costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Conversion! ships an update every 20 months, Inches and Millimeters every 11 months. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.

Scorecard2 real differences · 4 level
Conversion! versus Inches and Millimeters: the parameters behind the verdict, then further details
ParameterConversion!Inches and Millimeters
PriceFree — better$0.99
Update frequencyEvery 20 monthsEvery 11 months — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.013.0 — better
Further details — not scored
Size15 MB1 MB
Age rating4+4+
DeveloperGerhard LentschikLe Vu

In-app purchases

None

Conversion!

No in-app purchases

None

Inches and Millimeters

No in-app purchases

Questions

Is Conversion! free?
Conversion! is free to download, with no in-app purchases.
Is Inches and Millimeters free?
Inches and Millimeters costs $0.99, with no in-app purchases.
Do Conversion! or Inches and Millimeters have ads?
Neither Conversion! nor Inches and Millimeters shows ads.
Which is updated more often, Conversion! or Inches and Millimeters?
Conversion! ships an update every 20 months, and Inches and Millimeters every 11 months. Most recently, Conversion! was updated on October 7, 2026 and Inches and Millimeters on October 10, 2026.

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