Unit Converter HD. vs Smart Unit Conversion
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Unit Converter HD.
Easily convert over 700 units across 30 categories with this powerful tool. It offers a user-friendly interface, dark mode support, and a backspace key for quick corrections. Save time on all your measurement conversion needs.
- 700+ Units of Measure
- 30 Conversion Categories
- Easy-to-Use Interface
- Dark Mode Support
- Backspace Key
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The most powerful unit converter in the market. Helps you make easy conversion between more than 700+ various units of measure in 30 categories. Discover a universal assistant for all of your unit conversion needs. Features: √ 30 Categories √ 700+ Units of Measure √ Backspace key √ Extremely Easy-to-Use √ Supports Dark Mode Save Your Time. Quickly & Easily! Universer Unit Converter Free HD URL scheme is "EWUnitConverterFree://"
Smart Unit Conversion
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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
Verdict
The clearest difference is update cadence: Unit Converter HD. at every 2 months against Smart Unit Conversion's every 15 months. 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
Both are free to download. Unit Converter HD. 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.
Unit Converter HD. ships an update every 2 months, Smart Unit Conversion every 15 months. The most recent releases landed on September 19, 2026 and May 16, 2026 respectively.
| Parameter | Unit Converter HD. | Smart Unit Conversion |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (645 ratings) — better | — |
| Positive reviews | 93.8% of reviews | — |
| Number of ratings | 645 — better | — |
| Update frequency | Every 2 months — better | Every 15 months |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 13.4 |
| Further details — not scored | ||
| Size | 86 MB | 41 MB |
| Age rating | 4+ | 17+ |
| Developer | 良峰 侯 | Yui Lau |
Bugs and requests
Unit Converter HD.
Reported bugs
2 issues- Freezing or crashing on some devices
- Display issues with certain units
Requested features
3 requests- Add support for US weights (tons, lbs., oz.)
- Implement portrait mode support
- Provide more customization options
Smart Unit Conversion
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Unit Converter HD.
- Remove Ads Pack$1.99
Smart Unit Conversion
- 1 Year$1.991 Year
Questions
Is Unit Converter HD. free?
Is Smart Unit Conversion free?
Do Unit Converter HD. or Smart Unit Conversion have ads?
Which is updated more often, Unit Converter HD. or Smart Unit Conversion?
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