Calculator Tricks: Hidden Functions You Should Know

Calculator Apps: Best Free Options for iOS and Android

A good free calculator app can replace a physical device, speed homework, handle finances, or plot complex graphs. Below are top, well-rounded free picks across categories (basic, scientific, graphing, camera/math-solver, and Android-focused), with the key features, best use cases, and one-line recommendation for each.

1) Desmos Graphing Calculator (iOS, Android — Free)

• Best for: Graphing, algebra, precalculus and classroom use
• Key features: Interactive 2D graphing (Cartesian, polar, parametric), sliders, table view, inequalities, offline use, easy function input
• Why choose it: Powerful, polished graphing with a clean UI and strong education support
• Recommendation: Use Desmos if you need reliable, feature-rich graphing without cost.

2) Photomath (iOS, Android — Free)

• Best for: Step-by-step solutions and learning problem steps
• Key features: Camera scanning of problems, step-by-step explanations, built-in editor, graphing mode, support from arithmetic to trigonometry and some calculus
• Why choose it: Instant worked solutions make it ideal for students who want guided learning.
• Recommendation: Use Photomath to check homework and learn methods, not just to get answers.

3) PCalc Lite / PCalc (iOS — Free Lite; Android alternatives exist)

• Best for: Power users who want a professional scientific calculator (iOS)
• Key features: Full scientific functions, unit conversions, constants, customizable layout, undo/redo, optional paid add-ons for advanced features
• Why choose it: Desktop-class features and reliability in a mobile app.
• Recommendation: iOS users who want a serious scientific calculator should try PCalc Lite, upgrade if needed.

4) Calculator++ / Calculator Plus (Android — Free)

• Best for: Android users who need a combined scientific + graphing option
• Key features: Equation editor, history, variables, graphing, complex numbers, customizable modes; ad-supported but limited to secondary screens in many apps
• Why choose it: Feature-rich Android alternatives that rival paid calculators.
• Recommendation: Try Calculator++ for a robust all-in-one Android experience.

5) MyScript Calculator / Maple Calculator (iOS, Android — Free tiers available)

• Best for: Handwritten input and step-by-step symbolic help (Maple)
• Key features: Handwriting recognition (write math naturally), conversion to digital expressions, immediate results, advanced solvers and graphing (Maple)
• Why choose it: If you prefer writing equations by hand or need symbolic help, these are intuitive choices.
• Recommendation: Use MyScript for quick handwritten calculations; use Maple for deeper symbolic/graphing support.

How to choose the right free calculator app

• For graphing/math