Convora Units

Convora Units is a unit converter for everyday and technical work. It computes each result from a built-in factor table, so figures appear the moment you type.

Categories covered:
1. Length — mm to nautical miles.
2. Mass — milligram to stone.
3. Temperature — Celsius, Fahrenheit, Kelvin (formula-based, not scaled).
4. Volume — milliliter to US gallon, including tsp/tbsp/cup.
5. Area — square centimeter to square mile, plus hectare and acre.
6. Speed — m/s, km/h, mph, ft/s, knots.
7. Data — decimal (kB, MB, GB) and binary (KiB, MiB, GiB) sizes.
8. Time — millisecond to year.

How it works:
1. Pick a category from the chip row.
2. Choose a source unit and a target unit.
3. Type a value; the result updates on every keystroke.
4. Tap swap to reverse the direction.
5. Tap the star to keep a pairing in Favorites.

Favorites:
- Saved (category, from, to) triples persist between sessions.
- Tap one to reopen Convert with that pairing loaded.
- Remove any entry with one tap.

Reference tab:
- Cheat-sheet cards per category.
- Common equivalences plus the exact factors the app applies.

Details:
- Results use grouped thousands and magnitude-aware rounding.
- Input and selection survive rotation and process death.
- Two starter favorites are written on first launch (km to mi, C to F).
- Portrait layout, dark instrument theme.