Comparison

Converter vs Smart Unit Conversion

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

Head to head

Unit Converter

Smart Unit Conversion

Simple, Smart, Local Units

Free

🔧 Utilities

No ratingsView app →

About

Converter

Features

Read full description

It is a free and quick unit conversion tool. Decimal point may too long or need more accuracy, so a decimal point place selected function is provided for user. Converters: - Angle - Area - Digital Storage - Energy - Frequency - Length - Mass - Speed - Temperature - Time - Volume - Pressure Languages: - English - Traditional Chinese - Simplified Chinese

About

Smart Unit Conversion

Features

Read full description

This is a smart unit convertor that: 1. Support 21 languages and the Local Units 2. You can Customize the Sequence of Units 3. European number format supported Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Converter3 screens

Smart Unit Conversion4 screens

Verdict

The call

The clearest difference is update cadence: Converter at every 3 months against Smart Unit Conversion's every 15 months. Smart Unit Conversion's advantage is iOS requirement (13.4 vs 15.0). On price, 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

Both are free to download. Converter sells 1 one-off in-app purchase and Smart Unit Conversion sells 1 in-app purchase, starting at $1.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Converter ships an update every 3 months, Smart Unit Conversion every 15 months. The most recent releases landed on October 4, 2026 and October 8, 2026 respectively.

Scorecard2 real differences · 4 level

Converter versus Smart Unit Conversion: the parameters behind the verdict, then further details
Parameter	Converter	Smart Unit Conversion
Price	Free	Free
Update frequency	Every 3 months — better	Every 15 months
Ads	Yes	Yes
In-app purchases	Yes	Yes
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	15.0	13.4 — better
Further details — not scored
Size	23 MB	41 MB
Age rating	4+	17+
Developer	CHI HOU LAM	Yui Lau

In-app purchases

1 purchases

Converter

One-time1

Remove Advertising$0.99

1 purchases

Smart Unit Conversion

Subscriptions1

1 Year$1.991 Year

Questions

Is Converter free?

Converter is free to download, with in-app purchases available.

Is Smart Unit Conversion free?

Smart Unit Conversion is free to download, with in-app purchases available.

Do Converter or Smart Unit Conversion have ads?

Both Converter and Smart Unit Conversion show ads.

Which is updated more often, Converter or Smart Unit Conversion?

Converter ships an update every 3 months, and Smart Unit Conversion every 15 months. Most recently, Converter was updated on October 4, 2026 and Smart Unit Conversion on October 8, 2026.