Most unit converters ask you to pick two units before they will say anything. That is fine when you know both. It is tedious when the actual question is "how big is that, in anything I recognise?"
Dotori Unit Converter answers the second question. Choose a category, type a number into any row, and every other row updates at once.
One number, every row
Enter 100 metres in the length screen and yards, feet, and the rest appear together. There is no separate conversion to set up for each result, and nothing to swap.
Eight categories are covered:
- length, area, and volume
- weight and temperature
- speed and time
- data size, with decimal and binary units listed separately
Everything runs offline from the first launch. There is no conversion table to download, no account, and no login.
Numbers go in through a keypad built into the app. The system keyboard never covers the results.
Korean measures, beside the metric ones
This is the part other converters tend to leave out. Area in Korea is quoted in pyeong in conversation, and in square metres on paper. Same apartment. Weight at a butcher is quoted in geun.
Putting both on one screen means you stop converting in your head. Pyeong, don, geun, doe, ja, and ri each sit in the list next to the metric units they map onto.
They appear by default when the app language is Korean or the device region is Korea. Settings let you show them always or hide them, whichever suits.
Two definitions of geun, kept apart
One geun is 600 g at a butcher or a herbal pharmacy. One geun is 375 g at a greengrocer. The same word, two weights, depending on what you are buying.
The app lists both, each labelled with its gram value, and you pick the one you need. Automatic unit selection never switches between them either — that would silently change the answer.
Traditional measures use the conversion definitions stated in the app. Local market practice can differ slightly. Worth knowing before you settle an argument with a screenshot.
Readable units, and two ways to count a gigabyte
Automatic unit selection puts each row at a sensible scale. A distance entered in ri shows as kilometres rather than a long row of centimetres. The row you are typing into keeps the unit you chose. A unit you pick by hand stays locked until you release it.
Data size is split deliberately. Manufacturers count a 500 GB disk in thousands; Windows counts in 1024s and reports 465. Both appear on the same screen. The gap is a difference in counting, not missing capacity.
Your numbers and category choices stay on the phone. The app asks for no location, contacts, or storage access.
Wrap-up
Seeing every unit at once is a different experience from converting a pair at a time. The Korean measures sit beside the metric ones. The two definitions of geun stay separate. It all works with no connection.
Try the category you actually argue about — area, usually — and see both numbers land on one screen.
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