ArithCalc — Changelog & What's New | Tape Calculator Updates

In landscape, the tape now formats and right-aligns numbers just like in portrait, and the keyboard keys are taller and easier to tap.
Lines that can't be counted (a typo like "4,,4") are now flagged, and tapping the warning tells you why.
Typos with repeated operators (like "5++5") are cleaned up automatically instead of being ignored.
Number formatting now follows your device language by default — including the decimal and thousands separators — and you can still change them in Settings.
Paste a whole column of numbers at once: each line is picked up as its own entry.
Undo now steps back a word at a time instead of one character at a time.
Smoother performance on long tapes.

Malformed numbers (like "4,,4" or "4.5.6") no longer count as 0. They now
Division by zero no longer leaks a bad value into the total.
A number written as ".5" now shows as 0.5 (was shown as 5.0).
Middot (·) and the dot operator (⋅) now work as multiplication, alongside × and x.
A leading "+" (e.g. "+5") and a trailing decimal point (e.g. "5.") are accepted.

The extra keypad on the right now appears only in landscape; in portrait the keyboard stays at the bottom for easier reach.