Every unit. One tap. No signal required.
My Unit Converters turns your phone into a precise, offline-first conversion tool — length to digital storage, plus live currency — with a fast calculator built for the job, not a repurposed keyboard.
Built by MarvinSoft · Universal for iPhone and iPad
14 categories. 121 built-in units.
Every category ships with the units people actually reach for — and every one of them can be extended with your own.
Built-ins are just the starting list.
Add the units your work actually uses, and shape the calculator around how you enter numbers.
Add your own units
Define a custom unit for any category with its own conversion factor. It shows up right alongside the built-ins, ready to select as a "from" unit.
Edit, hide, and reorder
Rename or remove any unit you've added, hide the ones you never use, and drag the rest into the order that matches your workflow. Built-in units stay put — your list, your rules.
Filter on the fly
Flip on filter mode to narrow a long unit list down to exactly what you're looking for, without leaving the conversion screen.
A calculator built for conversions
A dedicated on-screen keypad replaces the system keyboard, so entering values stays fast and typo-proof, one thumb or two.
Numbers formatted your way, rates kept current.
Decimal places & separators
Choose how many digits show after the decimal point, and pick your own decimal and thousands-grouping symbols to match how numbers are written where you are.
Exchange rates, refreshed daily
Currency rates update automatically once a day so conversions stay current — and if you'd rather lock them in place, automatic updates are one switch away.
Your unit list lives on your device.
No account, no sign-in, no server round-trip for everyday conversions.
Works without a connection
Unit data is stored locally the moment you launch the app, so length, mass, temperature, and every other category convert instantly — on a plane, underground, or anywhere else signal doesn't reach. Only the daily currency refresh needs the internet.
Light, dark, or system
Follows your device's appearance automatically, or pick light or dark yourself and My Unit Converters will stay put.