GapCalc

Are you tired of basic calculator apps that force you to watch video ads, require an internet connection, and demand unnecessary permissions just to do simple math? Welcome to GapCalc — the calculator that replaces a whole shelf of single-purpose apps. Built by GapLogic, GapCalc delivers a lightning-fast, ad-free math experience with zero data collection and zero network permissions. That's not just a policy promise — the app is structurally unable to send your data anywhere, because it can't access the internet at all. FREE CORE FEATURES (Always Ad-Free): • Standard & Scientific Calculator — a clean keypad for everyday math and advanced functions like sin, cos, tan, log, ln, and more. • Visual History Tape — review past calculations, tap any entry to edit and instantly recalculate, and save named tapes for later (like "Monthly Budget"). • 100% Offline & Private — no Wi-Fi, no cellular data, no invasive permissions. • True Dark Mode & Light Mode — high-contrast OLED themes. GAPCALC PRO — ONE-TIME UNLOCK ($3.99): No subscriptions, ever. Pay once, own it forever. • Woodworker Mode — add, subtract, multiply, and divide mixed fractions (e.g., 5 3/8 + 2 1/4), round decimals to the nearest fraction, calculate board-foot lumber costs, run circle and arc geometry, and optimize cut lists so you never waste a board. • Universal Unit Converter — 10 categories including length, weight, volume, temperature, power, and energy, all instant and offline. • Visual Memory Banks — 5 drag-and-drop named memory slots for quick recall. • Everyday Financial Tools — calculate tips, split bills, discounts, and sales tax with built-in state rates. • Home-Screen Widget — a 4-function calculator right on your home screen, exclusively for Pro. THE GAPLOGIC PROMISE: • No subscriptions • No ads, ever • No data collection or analytics • No network permissions, period Download GapCalc today and see how a calculator app should actually work.