Calculator

A calculator for adding, subtracting, multiplying and dividing numbers of up to fifteen digits, six of them after the point. Merged from wasp-os's calculator and InfiniTime's Calculator.

Using it

• Tap the digit keys and the . key to type a number. The number being typed shows in large text; the result so far and the waiting operation show small above it.
• Tap +, -, × or ÷ to apply the waiting operation and choose the next one, whose key stays lit.
• Tap = to work out the sum. Tapping = again repeats the last operation.
• Tap ± to change the sign of the number being typed.
• Tap ← to delete the last digit typed; with nothing typed it clears the result.
• Tap C to clear everything.
• A result that is too large shows "too large" in red, and a division by zero "zero division"; the watch buzzes, and the next key starts afresh.
• The sum is kept when the app is closed, ready to carry on next time.

Screens

Cleared, showing zero.

Partway through 12 + 5: the result and the operation above, the number being typed below.

After 3.5 × 8 =: the result 28 above, with the last number and operation kept so that = repeats.

After 8 ÷ 0 =, the red "zero division" message.