Comparison

Unitify 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 conversion

Smart Unit Conversion

Simple, Smart, Local Units

Free

🔧 Utilities

No ratingsView app →

About

Unitify

Read full description

Unit conversion app, simple, quick, and easy to use. App Features: • App includes so many unit measurements. • Save your favorite unit conversion for fast and easy access. • Show/Hide unit groups based on your preference. • Easy in-app search. • Quick search by typing the unit you want to convert from, in the Spotlight search.

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

Unitify4 screens

Smart Unit Conversion4 screens

Verdict

The call

The clearest difference is in-app purchases: Unitify at none against Smart Unit Conversion's 1. Unitify also leads on ads (none vs shown) and update cadence (every 2 weeks vs every 15 months). Smart Unit Conversion's advantage is iOS requirement (13.4 vs 15.0). On price 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. Smart Unit Conversion sells 1 in-app purchase, starting at $1.99 per year. Unitify asks for nothing beyond the download.

UpkeepUpdate frequency

Unitify ships an update every 2 weeks, Smart Unit Conversion every 15 months. The most recent releases landed on September 11, 2026 and September 18, 2026 respectively.

Scorecard4 real differences · 2 level

Unitify versus Smart Unit Conversion: the parameters behind the verdict, then further details
Parameter	Unitify	Smart Unit Conversion
Price	Free	Free
Update frequency	Every 2 weeks — better	Every 15 months
Ads	No — better	Yes
In-app purchases	No — better	Yes
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	15.0	13.4 — better
Further details — not scored
Size	5 MB	41 MB
Age rating	4+	17+
Developer	Marwa Abou Niaaj	Yui Lau

In-app purchases

None

Unitify

No in-app purchases

1 purchases

Smart Unit Conversion

Subscriptions1

1 Year$1.991 Year

Questions

Is Unitify free?

Unitify is free to download, with no in-app purchases.

Is Smart Unit Conversion free?

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

Do Unitify or Smart Unit Conversion have ads?

Smart Unit Conversion shows ads; Unitify does not.

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

Unitify ships an update every 2 weeks, and Smart Unit Conversion every 15 months. Most recently, Unitify was updated on September 11, 2026 and Smart Unit Conversion on September 18, 2026.