feature,area,priority,original,clone,notes
Basic arithmetic + − × ÷,core,must,yes,yes,
Live result preview while typing,core,must,yes,yes,
Equals makes the result the new expression,core,must,yes,yes,
Parentheses smart toggle key,core,must,yes,yes,
Percent,core,must,yes,yes,
Backspace and long-press to clear,core,must,yes,yes,
AC clears,core,must,yes,yes,
Exact arithmetic (no floating point errors),core,must,yes,yes,BigDecimal/rational
Errors shown (division by zero domain errors),core,must,yes,yes,
Auto-shrinking display for long input,display,must,yes,yes,
Scientific row √ π ^ !,science,must,yes,yes,
Expanded panel sin cos tan ln log e,science,must,yes,yes,
Deg/Rad switch,science,must,yes,yes,
Inv swaps to inverse functions,science,must,yes,yes,
Implicit multiplication (2π 3(4)),core,should,yes,yes,
History grouped by day,history,must,yes,yes,
Tap a history entry to reuse,history,must,yes,yes,
Clear history,history,should,yes,yes,
Pull down the display to open history,history,should,yes,yes,
Copy result / paste into expression,clipboard,must,yes,yes,
Memory store and recall (MS MR),clipboard,should,yes,yes,
Big numbers like 100! with scrolling,core,should,yes,partial,"exact, shown scientific (9,33E157); full digits not scrollable yet"
Locale decimal separator,display,should,yes,yes,comma in German
Expressive keys with press morph,design,must,yes,yes,
Dynamic colour (wallpaper) and dark mode,design,must,yes,yes,
Haptic key feedback,design,should,yes,yes,
Tablet / landscape layout with all functions,layout,could,yes,no,
Feedback and help,other,could,yes,skip,Google service