HubzillaCalc
Calculator built for teachers
Free
The scientific calculator you already know: natural display, exact surds, statistics and tables. Free on iPhone, iPad and Mac.
The scientific calculator you already know how to use.
HubzillaCalc works exactly like the calculator sitting in most school bags and desk drawers. The same key layout, the same natural display, the same order of
operations, and the same answers — so there is nothing to relearn. If you have ever used one in a maths or science lesson, you can already use this.
It is the whole calculator, complete with Statistics and Table modes.
NATURAL DISPLAY
• Fractions, powers, roots, surds and mixed numbers shown the way they are written.
• Exact answers: √50 gives 5√2, not 7.071067812
• S⇔D to flip between exact, decimal and recurring forms
• A big, high-contrast display that stays readable at arm's length
THE FULL FUNCTION SET
• Statistics mode: 1-variable and seven regression models, with the full statistics menu
• Table mode: generate a table of values for f(x) and g(x)
• Trigonometry in degrees or radians; logarithms to any base
• Memory (M+/M−) and variables A–F, X, Y, Ans and PreAns
• Fix / Sci / Norm, engineering notation, degrees-minutes-seconds, remainder division, prime factorisation, nPr and nCr, GCD and LCM
• A built-in library of physics constants
MAKE IT YOURS
• Fifteen themes, light and dark, plus a live editor where every single colour on the calculator can be changed
• On iPad, keep it in Slide Over and it floats over your notes, a worksheet or a textbook — there whenever you need it, without switching apps
• Pair a keyboard and drive the whole thing by touch-typing; press ? to overlay the shortcuts onto the keypad
PRIVATE BY DESIGN
• No account, no ads, no analytics, no tracking
• Works entirely offline
FREE, WITH NOTHING HELD BACK
Every feature, on every platform. No trial, no unlock, no subscription, no ads.
Built by a maths teacher, so it behaves the way it is supposed to.
Ratings & Reviews
The developer, James Hubball, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- James Hubball
- Size
- 22.8 MB
- Category
- Education
- Compatibility
Requires iOS 15.6 or later.
- iPhone
Requires iOS 15.6 or later. - iPad
Requires iPadOS 15.6 or later. - iPod touch
Requires iOS 15.6 or later. - Mac
Requires macOS 12.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Jamie Hubball