Broad tool coverage
Basic, Scientific, Percentages, Fractions, Graphing, Geometry, Unit Conversion, Numbers, Permutations, Money, and Time are all available from one app shell.
Now built for iPhone and iPad
A focused calculator suite for everyday work, advanced math, graphing, conversions, finance, and time.
Great Calculator brings the calculator workflows people usually split across several apps into one polished, touch-first interface. It supports iPhone and iPad, light and dark appearance, portrait and landscape orientation, local history, and optional on-demand exchange-rate lookup.
iPhone + iPad
Portrait + landscape
On-device first
No account required
Live rates only on demand
The developer actively reviews bug reports and feature requests, and continues updating Great Calculator to improve accuracy, reliability, efficiency, layout behavior, and user-requested workflows.
What sets it apart
Commercial-grade breadth without giving up practical speed.
Great Calculator is designed for users who want one dependable calculator for school, work, budgeting, conversions, quick checks, and deeper math exploration.
Local-first privacy
Most workflows run locally. The current release does not require an account, does not include third-party analytics SDKs, and does not track users across apps or websites.
Responsive development
Support is not an afterthought. The developer reviews requests and continues shipping refinements for calculation accuracy, efficiency, and layout quality.
Adaptive iOS experience
The app is designed for iPhone and iPad, all interface orientations, light and dark mode, readable tap targets, local settings, and quick-launch widgets.
Included calculator types
One app, many workflows.
Each mode is intentionally named and documented so users can quickly understand what the app currently exposes.
Basic
Scientific
Percentages
Fractions
Graphing
Geometry
Unit conversion
Numbers
Permutations
Money
Time
Math and equations
- Basic arithmetic with real-time preview and committed history.
- Scientific functions, variables, memory, trigonometry, logarithms, powers, and equations.
- Fractions and mixed-number arithmetic.
- Percentages with live totals and chart previews.
Visual and utility tools
- Graphing with multiple functions, trace behavior, roots, and intersections.
- 2D and 3D geometry formulas.
- Unit conversion across common practical categories.
- Time calculations, countdowns, and between-date workflows.
Finance and counting
- Currency conversion with optional on-demand exchange-rate lookup.
- Tip, APR, auto loan, mortgage, ROI, discount, and related finance helpers.
- Permutations, combinations, factorial, and list generation.
- Numbers features, averages, random ranges, GCD, and LCM.
Trust surfaces
- Dedicated privacy policy and privacy choices pages.
- Public support channel with a reproducible report template.
- Accessibility, age-suitability, license, and content-rights pages.
- Clear explanations of optional network behavior.
Public App Store support
Transparent public pages for users and review teams.
This website is designed to support App Store metadata, in-app links, and real users who need privacy, support, accessibility, or legal information.
App Store
Apple product page
Open the current App Store listing for Great Calculator, screenshots, version history, compatibility, and user-facing store details.
PrivacyPrivacy Policy
Current-release details for local storage, optional currency-rate requests, support email, retention, and deletion choices.
SupportResponsive help
Contact the developer for bugs, product questions, accessibility feedback, and feature requests.
AccessibilityAccessibility posture
Implementation summary and validation checklist for iPhone and iPad use.