Scientific Calculator: History

Ever mistype one digit and have to re-enter the whole calculation? FormulaCalc keeps the entire expression visible. Tap to place the cursor, fix just that one digit, and get the new result instantly. Both the expression and the result are saved to history, so you can search past calculations and either reuse the full expression or insert just the result — no retyping. SEE IT, FIX IT • The full expression stays visible while you type • Tap to move the cursor, select a range to replace it • Operator precedence, parentheses, and implicit multiplication (2π, 2(3+4)) • Live result preview while typing, with clear error hints • Undo, redo, and external keyboard support HISTORY YOU CAN ACTUALLY USE • Expressions and results saved together (up to 500 entries) • Search, favorites, individual delete, and text export • Reuse the whole expression, or insert only the result at the cursor A COMPLETE SCIENTIFIC CALCULATOR • Trig, inverse trig, hyperbolic, logarithms, roots, powers, factorial, modulo, absolute value • DEG / RAD always visible, switched with one tap • Calculator-style percentages (200+10% = 220) • Ans and memory keys (MC / MR / M+ / M−) • Automatic, scientific, and engineering notation with 6–15 significant digits • A dedicated landscape layout with expression, history, and keys side by side PAY ONCE, KEEP IT PRIVATE • No ads, no tracking, no account, no network access • Expressions, history, and settings never leave your device • One purchase unlocks everything — no subscription Light and dark appearance, haptic feedback, and VoiceOver support. From homework to engineering estimates, FormulaCalc makes "fix it and reuse it" the normal way to calculate.