Units vs All Unit Conversion
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Units
Easily convert between hundreds of units across 43 categories, including currency with daily updated rates. Customize your workflow by hiding or reordering units and categories.
- Hundreds of units across 43 categories
- Daily updated currency exchange rates
- Hide unused units
- Reorder units and categories
- Universal app support (iPhone, iPod touch, iPad)
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Units is a really useful free app that lets you easily convert from various units into lots of others. Units can convert hundreds of units from 43 different categories including Speed, Time, Length, Volume, Area, Power, Temperature, Fuel Consumption, Shoe Sizes and loads more! Units is a fully universal app with native support for iPhones, iPod touches, and iPads. • Convert hundreds of units - Units has over 800 units across 43 different categories. • Convert currency - Units can convert between 88 different currencies, with rates updated daily. • Hide unused units - Units lets you hide units you don't use, allowing you to maintain a streamline conversion workflow. • Reorder both units and unit categories to suit your needs.
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
The clearest difference is rating: All Unit Conversion at 4.6 against Units's 3.6. All Unit Conversion also leads on in-app purchases (none vs 3) and ads (none vs shown). Units's advantage is ratings volume (150 vs 17) and review sentiment (60% vs 50%). On price 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. Units sells 3 one-off in-app purchases. All Unit Conversion asks for nothing beyond the download.
All Unit Conversion holds the better App Store score, 4.6 against 3.6. That said, the two scores are not equally well evidenced: Units has 150 ratings behind it against 17, so its average is the more settled of the two. Written reviews complicate that: 60% of Units's written reviews are positive against 50% of All Unit Conversion's, so the app with the better star average is not the one people write more warmly about.
Units ships an update monthly, All Unit Conversion every 2 months. The most recent releases landed on September 22, 2026 and September 13, 2026 respectively.
| Parameter | Units | All Unit Conversion |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (150 ratings) | 4.6 (17 ratings) — better |
| Positive reviews | 60.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 150 — better | 17 |
| Update frequency | Monthly — better | 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 | 13.5 — better | 16.6 |
| Further details — not scored | ||
| Size | 2 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Homegrown Software Ltd | Tiago Do Couto |
Customer experience
Units
All Unit Conversion
Bugs and requests
Units
Reported bugs
4 issues- Crashes when clearing input fields
- Numerical keypad covers conversion results
- Incompatibility issues with newer iOS versions
- Ruler measurements not accurate on all devices
Requested features
5 requests- Add nautical units (miles, knots)
- Improve currency conversion accuracy and updates
- Allow customization of visible unit categories
- Add more clothing/shoe size conversions
- Improve user interface and search functionality
All Unit Conversion
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Units
- Small Tip$0.99
- Medium Tip$2.99
- Large Tip$4.99
All Unit Conversion
No in-app purchases
Questions
Is Units free?
Is All Unit Conversion free?
Which has better reviews, Units or All Unit Conversion?
Do Units or All Unit Conversion have ads?
Which is updated more often, Units or All Unit Conversion?
Other comparisons
