ConvertPad is a long-standing unit converter app for Android and iOS. With a 4+ star rating and millions of downloads, it's clearly a useful tool. But apps come with trade-offs: installation, storage, updates, and the inability to use them on a laptop or shared computer.

UnitSwiftPro takes the opposite approach — a web-based tool that works on any device, no install needed. This page compares them so you can pick the right tool for how you work.

★ Verdict

ConvertPad is a solid app if you only convert on one device. UnitSwiftPro is the better choice if you want a tool that works everywhere — phone, tablet, laptop, work computer, friend's phone — without installing anything, and without giving up storage space.

ConvertPad vs UnitSwiftPro

How the two tools stack up across the features that matter most.

Feature	ConvertPad	UnitSwiftPro
Platform	Android & iOS app only	Any device with a browser
Installation required	Yes	No
Uses phone storage	Yes (~30 MB)	No
Manual updates	Yes	No (always current)
Works on desktop / laptop	No	Yes
Works on a shared computer	No	Yes
Number of units	200+	326+
Categories	20+	15
Conversion formulas shown	Limited	Always
Shareable via link	No	Yes
Bookmarkable converters	No	Yes (100+ pages)
Works offline	Yes (after install)	Yes (after page load)
Free version	Ad-supported	Ad-supported
Sign-up required	No	No

Why UnitSwiftPro is the better choice

Six reasons most users prefer UnitSwiftPro for everyday conversions.

🚫

No install

No trip to the App Store, no waiting for a download, no using up phone storage. Just open the URL and start converting.

💻

Works on every device

Phone, tablet, laptop, work computer, library computer, friend's phone. The same tool, the same bookmarks, the same data.

🔄

Always up to date

No app updates, no "please update to continue" prompts. You always get the latest version of UnitSwiftPro.

🔗

Shareable

Send a colleague a link to the exact converter you used. They open it, they convert. No app needed.

📚

Bookmarks that travel

Bookmark kg-to-lbs, miles-to-km, celsius-to-fahrenheit. Your favorite converters are one tap away on any device.

💾

No storage cost

ConvertPad is ~30 MB. UnitSwiftPro is 0 MB on your device. Multiply by 10 apps and you've freed up 300 MB.

Frequently asked questions

Both work well on mobile. ConvertPad is a native app with haptic feedback; UnitSwiftPro is a responsive web app. Most users find UnitSwiftPro more than fast enough on mobile, and the lack of installation is a major win.

UnitSwiftPro covers 326+ units across 15 main categories. ConvertPad has more sub-categories, but UnitSwiftPro covers all the common and most of the uncommon units you'll encounter.

Yes — and unlike ConvertPad (iOS only), UnitSwiftPro works identically on iPad, Android tablet, Kindle Fire, or any other tablet with a browser.

In a direct test on the same device, both are fast. UnitSwiftPro has the advantage of not needing to launch an app — just tap a bookmark or type a URL.

Try UnitSwiftPro free

0 converters, no sign-up, no fees. See for yourself why thousands of users prefer UnitSwiftPro.

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UnitSwiftPro vs ConvertPad