Unit Converter HD. vs All 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://"
All Unit Conversion
Easily convert between various units of measurement with this free utility app. It supports conversions for length, area, volume, mass, time, digital storage, energy, and currency.
- Length conversion
- Area conversion
- Volume conversion
- Mass conversion
- Time conversion
- Currency conversion
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This is a simple and useful free unit converter - Length Converter - Area Converter - Volume Converter - Mass Converter - Time Converter - Digital Storage Converter - Energy Converter - Currency Converter
Screenshots
Verdict
Unit Converter HD. and All Unit Conversion both sit at 4.7 stars, but that hides the real split: 94% of Unit Converter HD.'s written reviews are positive against 50% of All Unit Conversion's. Unit Converter HD. also leads on ratings volume (644 vs 17) and device support (3 vs 1). All Unit Conversion's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, rating and update cadence 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. All Unit Conversion asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.7 for Unit Converter HD. against 4.6 for All Unit Conversion. That said, the two scores are not equally well evidenced: Unit Converter HD. has 644 ratings behind it against 17, so its average is the more settled of the two. Written reviews are what separate them: 94% of Unit Converter HD.'s written reviews are positive against 50% of All Unit Conversion's.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 20, 2026 and October 17, 2026 respectively.
| Parameter | Unit Converter HD. | All Unit Conversion |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (644 ratings) — better | 4.6 (17 ratings) |
| Positive reviews | 93.8% of reviews — better | 50.0% of reviews |
| Number of ratings | 644 — better | 17 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 86 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | 良峰 侯 | Tiago Do Couto |
Customer experience
Unit Converter HD.
All Unit Conversion
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
All Unit Conversion
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Unit Converter HD.
- Remove Ads Pack$1.99
All Unit Conversion
No in-app purchases
Questions
Is Unit Converter HD. free?
Is All Unit Conversion free?
Which has better reviews, Unit Converter HD. or All Unit Conversion?
Do Unit Converter HD. or All Unit Conversion have ads?
Which is updated more often, Unit Converter HD. or All Unit Conversion?
Other comparisons
