A Unit Converter for iPhone and iPad

The same conversion library on phone and tablet

An iPhone is often the device already in your hand when a measurement needs converting. An iPad may be the better workspace beside a manual, recipe, lesson, or engineering diagram. ConvertDroid supports both without reducing the tablet experience to an enlarged phone screen.

The app provides 60 categories and 630 units across everyday measurements, engineering, electricity, light and radiation, digital media, timecode, clothing sizes, and other specialized areas. Search, favorites, and local history use a consistent model across Apple devices.

Quick conversion on iPhone

On iPhone, ConvertDroid prioritizes a direct path from category to result. Browse one of six groups or search by unit or category name. Select the input unit, enter a value, and the other units in that category update immediately.

This approach works well when checking weather while traveling, translating a package weight, comparing fuel economy, working at a bench, or resolving a unit in a conversation. You do not need to choose a new destination and press Convert for each comparison.

Portrait orientation keeps the main interaction focused. Landscape orientation provides additional width when that is more comfortable for the category or task. Adaptive keypads handle ordinary decimal measurements and specialized inputs such as hexadecimal values or resistor bands.

An iPad layout that uses the available space

On iPad, ConvertDroid can keep category navigation visible beside the conversion content. The split-panel approach reduces back-and-forth navigation when moving through several categories or comparing technical information.

The larger screen is useful in settings such as:

• Reviewing conversions beside coursework or reference material
• Keeping a converter open near a keyboard, workbench, or instrument
• Comparing multiple units without crowding the active value
• Working in landscape with persistent category context
• Demonstrating a conversion during a meeting or lesson

The phone and tablet interfaces share the same library and concepts, so moving between devices does not require relearning the app.

Favorites for repeated Apple-device workflows

Most people use a small subset of units more often than the rest. Favorites let you pin those recurring choices. A traveler might save Celsius and Fahrenheit, an engineer might pin pressure or viscosity units, and a creator might keep data size, transfer rate, or timecode close at hand.

Recent conversion history is stored locally. It can help you return to a value without recreating the input, while avoiding an account or cloud profile solely for basic conversion history.

Number-display settings allow control over decimal places and thousands separators. These options change presentation, so remember to preserve the accuracy and significant figures of the source measurement.

Broad categories without a collection of apps

ConvertDroid includes the everyday measurements expected from a unit converter—mass, distance, area, volume, temperature, pressure, and speed—but it also covers less common needs.

Examples include solution and molar concentration, moment of inertia, angular acceleration, dynamic and kinematic viscosity, sound level, resistivity, radiation measurements, Carbon-14 dating, numeral systems, RGB values, SMPTE timecode, typography, musical intervals, and clothing sizes.

Keeping these in a searchable library means an unfamiliar conversion does not require finding and evaluating another single-purpose app.

Privacy without an account

ConvertDroid does not require account creation and does not include advertising networks, analytics platforms, social SDKs, or crash-reporting services that collect user data. Preferences, favorites, and history are stored locally on the device.

The app requests only permissions needed for its core operation and does not need access to contacts, location, camera, microphone, photos, or calendars. Full details are available in the linked privacy policy.

When a dedicated app is useful

Search engines and voice assistants can answer isolated conversion questions, but a dedicated app is more efficient when conversions are repeated, connectivity is limited, several output units need comparison, or the category uses specialized input.

ConvertDroid provides the same organized workflow each time and keeps the full library available on the device. Download it from the Apple App Store when you want one conversion tool that is comfortable on both iPhone and iPad.