Best iPhone Calculator Apps (2026): 10 Top iOS Math & Scientific Apps

Whether you need a quick tool for splitting restaurant bills, solving advanced calculus equations, or managing financial projections, the default iOS calculator often falls short. We evaluated the top iOS calculator apps in 2026 based on formula editing, unit conversion, memory history, and Apple ecosystem integration.

1. PCalc (The Powerhouse for Engineers & Scientists)
PCalc is widely regarded as the gold standard for power users on iOS and iPadOS. It features an optional RPN (Reverse Polish Notation) mode, multi-line display, extensive unit conversion constants, and Apple Watch support with editable button layouts.

2. Calzy (Best Modern UI & Memory Area)
Calzy reinvents day-to-day calculations with its award-winning minimalist interface and proprietary 'Memory Area'. You can drag, drop, and label intermediate calculation values to reuse them across complex multi-step math problems.

3. Soulver 3 (Best Notepad & Natural Language Calculator)
Soulver is not a traditional button grid—it is a smart notepad that calculates as you type plain English phrases (e.g., '$50/hour for 35 hours - 20% tax'). It is ideal for budgeting, currency calculations, and multi-line scenarios.

4. Calcbot 2 (Best History Tape & Unit Converter)
Developed by Tapbots, Calcbot combines an easy-to-read live history tape with instant conversions across 500+ units in 22 categories. Every calculation is preserved and can be sent back to the main display with a single tap.

5. Numerical² (Fastest No-Equals-Key Calculator)
Numerical² removes the '=' button entirely, evaluating expressions in real time as you type. It includes full scientific functions, brackets, fraction support, and iCloud history sync across iPhone and iPad.

6. Photomath (Best Step-by-Step Math Solver)
Using camera OCR and interactive AI solving, Photomath scans printed and handwritten math problems, breaking them down into step-by-step visual explanations and animated graph representations.

7. Solves (Best Cursor Editing & Tagged Calculations)
Solves offers free-form cursor placement, allowing you to edit any part of a long mathematical equation without clearing your work. It supports comments, variables, and dark/light themes.

8. Calculator M+ (Best Multi-Memory Storage)
Designed for accounting and bookkeeping, Calculator M+ provides multiple independent memory slots (M1, M2, M3) alongside tax and percentage calculation presets.

9. Uno Calculator (Best Open-Source Programmer Tool)
A native port of the open-source Windows Calculator to iOS, Uno Calculator delivers reliable standard, scientific, and dedicated programmer modes (HEX, DEC, OCT, BIN bitwise operations).

10. Desmos Graphing Calculator (Best Free Graphing Suite)
An essential free tool for students and educators, Desmos plots complex algebraic equations, trigonometric curves, and parameter sliders with zero ads or subscriptions.