Unit Converter vs Plain Units
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Unit Converter
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A simple and easy-to-use unit converter app. Quickly and accurately convert commonly used units such as length, weight, temperature, area, volume, and speed. Just enter a number and it will automatically convert to the selected unit in real time. With a clean UI and history feature, anyone can use it intuitively. β Key Features [Instant Unit Conversion] - Automatically converts as you type - Supports length / weight / temperature / area / volume / speed - Quickly select commonly used units - Real-time results [Supported Units] - Length: centimeter / meter / inch / foot, etc. - Weight: gram / kilogram / ounce / pound, etc. - Temperature: Celsius (β) / Fahrenheit (β) - Area: square meter / square foot / square mile / are, etc. - Volume: liter / milliliter / gallon, etc. - Speed: km/h / mph, etc. [Simple and Clean UI] - Minimal design focused on essential information - Large, easy-to-read text - Intuitive one-tap unit switching [Flexible History Management] - View conversion history in a list - Supports automatic or manual saving - Easily copy or delete history items [Quick Copy Feature] - Copy conversion results with a single tap [Customizable Settings] - Adjust decimal precision - Enable/disable haptic feedback - Choose how history is recorded [No Login Required] - No account needed β start using immediately From everyday calculations to work and study, enjoy a simple and stress-free unit conversion experience.
Plain Units
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Simple Unit Converter is a calm, numeric-first converter that gets out of your way. Pick a category, type into any field, and every other unit on the page updates instantly. No account, no sign-in, no clutter. 14 CATEGORIES β’ Length β’ Mass β’ Temperature β’ Time β’ Speed β’ Area β’ Volume β’ Digital Storage β’ Data Transfer Rate β’ Energy β’ Frequency β’ Fuel Economy β’ Plane Angle β’ Pressure WHY YOU'LL LIKE IT β’ Type into any unit, not just a "from" box. Every other unit converts as you type. β’ All units in a category are visible at once, so you never dig through pickers. β’ Searchable category grid to jump straight to what you need. β’ Tap a result to copy a clean, paste-ready value. β’ Remembers your last category, unit, and value between launches. β’ Light and dark mode, and works on iPhone and iPad. β’ Everything runs on your device. No servers, no analytics, no tracking of your conversions. REMOVE ADS The free version shows ads. A one-time purchase removes them forever and restores on all your devices signed in to the same Apple Account.
Screenshots
Verdict
The clearest difference is in-app purchases: Unit Converter at none against Plain Units's 1. Plain Units's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Plain Units sells 1 one-off in-app purchase. Unit Converter asks for nothing beyond the download.
Unit Converter ships an update every 2 months, Plain Units every 3 weeks. Both last shipped on October 31, 2026.
| Parameter | Unit Converter | Plain Units |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 3 weeks β better |
| Ads | Yes | Yes |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 16.4 β better |
| Further details β not scored | ||
| Size | 11 MB | 48 MB |
| Age rating | 4+ | 4+ |
| Developer | MITSUKO MARGOT KUBOTA ONO | Nicolaus Lawson |
In-app purchases
Unit Converter
No in-app purchases
Plain Units
- Remove Ads$3.99
Questions
Is Unit Converter free?
Is Plain Units free?
Do Unit Converter or Plain Units have ads?
Which is updated more often, Unit Converter or Plain Units?
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