Function Calc
by Hugh Pelham more by this developer →
#428,971 of 719,669 by ratings on Apple · #19,742 of 35,906 in Productivity
First seen by this census 09/05/2026 — the store does not publish a creation date
Last updated 07/21/2026
Tracked since 09/05/2026
Compare with another extension
Category: Productivity
Description
A full-function, programmable, graphing scientific calculator designed to be very quick and easy to use, but with the added power of customisation. Tape display is visible while you type, and a swipe away from full screen view. Select and directly input any number from tape, undo or edit calculations. Easily create and use custom functions, store equations and useful numbers, use complex functions with multiple variables - fully programmable. Plot functions on a zoomable graph, export a high-resolution pdf copy. Dictate calculations and numbers for statistical analysis, with instant results. Completely free.
• no adverts, no in-app purchases.
• full set of scientific functions, unlimited nested brackets.
• swipe to undo, step by step.
• easily edit calculations and re-calculate.
• optionally enter and edit calculations in standard maths format, rather than calculator order.
• visible memory store.
• tape output shows all calculations – swipe for full screen.
• never type the same number twice – direct input from tape.
• instantly convert between more than 120 different units.
• zoomable text for easy reading and editing.
• fully editable useful numbers page – store constants, conversion factors, commonly used numbers, tappable URLs or email addresses, or any text.
• create, store and use functions for unit conversions or calculations, as simple as copy and paste.
• dictate calculations, or lists of numbers for statistical analysis, get instant results.
• create, edit and use complex functions with up to ten inputs or outputs – solve quadratic and cubic equations, calculate mortgage payments, compound interest, body mass index, triangles, the day of the week for any date, sunrise and sunset times and direction for any date and place, statistics (including normal, Student's T, Chi Square and F cumulative probability functions) and more – create or keep exactly what is useful, edit or delete what isn’t. 50 functions included.
• fully zoomable graphing capability, plot one or two functions on a graph. Export PNG or high-resolution large pdf copies.
• ideal for complex or repetitive tasks – custom functions reduce errors.
• full help included.
Alternatives to Function Calc
| Name | Ratings | Rating | |
|---|---|---|---|
Twin Calculator -Multi-function calculator-
by Akiji Ando
|
1 | 1.0 | compare |
Fraction Calculator Plus #1
by DigitAlchemy LLC
|
22,309 | 4.9 | compare |
Conversion Calculator Plus
by Yan Liong Tan
|
15,187 | 4.7 | compare |
ClevCalc - Calculator
by Cleveni Inc.
|
13,465 | 4.7 | compare |
Grades - Grade Calculator, GPA
by Plutonium Apps, LLC
|
12,641 | 4.9 | compare |
OneCalc: All-in-one Calculator
by tasser gyati
|
5,076 | 4.6 | compare |
Calculator with History Tape
by 帆 杨
|
3,209 | 4.7 | compare |
Total Plus:Shopping Calculator
by Filemon Salas
|
2,271 | 4.6 | compare |
Calcularium
by InVooDoo LLC
|
2,174 | 4.6 | compare |
iFraction Calculator
by CONG DUC TRAN
|
1,709 | 4.7 | compare |
Growth
Change in ratings, scaled to each window from the real gap between crawls. A window needs a full period of history before it reports anything.
| Per | Growth | Growth % | Actual change | Measured over |
|---|---|---|---|---|
| day | Not enough history yet | |||
| week | Not enough history yet | |||
| month | Not enough history yet | |||
| year | Not enough history yet | |||
History
Tracking since 09/05/2026. History accumulates as changes are observed — check back soon.