---
title: "Function Calc - Reviews, Revenue and Downloads in United States | Apple App Store"
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"
---

# Function Calc — United States
> fully programmable calculator

![Function Calc App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/07/3d/c4/073dc471-f5fb-97a0-1e26-c1902dc526a6/AppIconGlass-0-0-1x_U007ephone-0-0-0-1-0-sRGB-85-220.png/434x0w.png)

**Developer:** [Hugh Pelham](https://apptail.io/developer/hugh-pelham-cbdc)
**Category:** Productivity
**Rating:** 5.0/5 (2 ratings)
**Price:** Free
**Bundle ID:** com.HughPelham.FunctionCalc
**Store:** Apple App Store
**Country:** United States
**Version:** 17.2 (released 2026-02-16)
**Original Release:** 2017-01-09
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1188227053)
**AppTail Page:** [https://apptail.io/app/function-calc-DUk/united-states](https://apptail.io/app/function-calc-DUk/united-states)

## Function Calc 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.

## Function Calc Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/5e/cc/81/5ecc81f3-df97-a8d9-8ac9-56c327f3c0ff/Simulator_Screenshot_-_iPhone_SE__U00283rd_generation_U0029_-_2025-09-16_at_13.48.59.png/750x1334.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/cf/49/e7/cf49e7ef-ccb7-ed94-648f-e20f18a92cbf/Simulator_Screenshot_-_iPhone_SE__U00283rd_generation_U0029_-_2025-09-16_at_13.49.02.png/750x1334.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/be/33/6d/be336d61-61e4-8089-6b4c-fef1b8e3be1e/Simulator_Screenshot_-_iPhone_SE__U00283rd_generation_U0029_-_2025-09-16_at_13.50.37.png/750x1334.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/4b/26/23/4b262371-a257-f61e-3b7d-3b825d188310/Simulator_Screenshot_-_iPhone_SE__U00283rd_generation_U0029_-_2025-09-16_at_14.05.25.png/750x1334.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/34/25/b0/3425b093-28d8-f0a7-7d92-55a434e5c3d6/Simulator_Screenshot_-_iPhone_SE__U00283rd_generation_U0029_-_2025-09-16_at_13.48.32.png/750x1334.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/ed/5c/1d/ed5c1d48-b8d4-1e20-5709-e397646a3d02/Simulator_Screenshot_-_iPhone_SE__U00283rd_generation_U0029_-_2025-09-16_at_13.51.19.png/750x1334.png)
- [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/75/af/c3/75afc360-f9b5-3914-5453-1220ee47bdcc/Simulator_Screenshot_-_iPhone_SE__U00283rd_generation_U0029_-_2025-09-16_at_13.48.54.png/750x1334.png)
- [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/c5/ce/68/c5ce682d-6be6-7c66-ba36-ab883f33a3bb/Simulator_Screenshot_-_iPhone_SE__U00283rd_generation_U0029_-_2025-09-16_at_13.49.25.png/750x1334.png)
- [Screenshot 9](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/98/eb/8d/98eb8da9-3222-27da-b5f6-4ef680cc408e/Simulator_Screenshot_-_iPhone_SE__U00283rd_generation_U0029_-_2025-09-16_at_13.44.39.png/750x1334.png)
- [Screenshot 10](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/22/05/93/22059341-5a67-079b-752a-0804715cdded/Simulator_Screenshot_-_iPhone_SE__U00283rd_generation_U0029_-_2025-09-16_at_13.52.16.png/750x1334.png)

## Function Calc Rating Breakdown in United States
- 5 stars: 2 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)

## Function Calc Reviews in United States

### ***** "This app is so great but make it the greatest"
Hugh,

I have dedicated some times to evaluate your product.

I rate it as 5 although it needs some enhancements.

Kindly please find time in future versions to include if , for , else or then statements, loops, max and min to make it the greatest. Even more so it is able to add graphics on the background for a certain repetitive problem.

I salute you even more as you are giving it free to humanity and for that you are truly blessed.

Hope to see these enhancements soon and more 
feedback from me.

Thank you very much!

Vernon P., PE, MAA emeritus
-- Ver Pang, 2024-03-28

### ***** "Great functionality, but want more precision"
As a programmer I use the calculator to work with large numbers and sometimes I need to see more digits.

For example:
268,697,600 x 512  shows 1.37573171e11 but is missing the last (9th) digit in the general display - although in the history tab it displays accurately, but this can be confusing and annoying.
-- sibylt, 2023-11-06

### ***** "Clean and simple. I like it!!"
Very good calculator app. Wow, no ads and it’s free. Thx
-- nanodisk, 2019-11-18

[View all Function Calc reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)



## Function Calc Discovered Keywords
- function calculator
- function calc

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## Function Calc Available In
- [United States](https://apptail.io/app/function-calc-DUk/united-states)
- [Argentina](https://apptail.io/app/function-calc-DUk/argentina)
- [Austria](https://apptail.io/app/function-calc-DUk/austria)
- [Australia](https://apptail.io/app/function-calc-DUk/australia)
- [Azerbaijan](https://apptail.io/app/function-calc-DUk/azerbaijan)
- [Belgium](https://apptail.io/app/function-calc-DUk/belgium)
- [Bulgaria](https://apptail.io/app/function-calc-DUk/bulgaria)
- [Brazil](https://apptail.io/app/function-calc-DUk/brazil)
- [Belarus](https://apptail.io/app/function-calc-DUk/belarus)
- [Belize](https://apptail.io/app/function-calc-DUk/belize)
- [Canada](https://apptail.io/app/function-calc-DUk/canada)
- [Switzerland](https://apptail.io/app/function-calc-DUk/switzerland)
- [Chile](https://apptail.io/app/function-calc-DUk/chile)
- [China](https://apptail.io/app/function-calc-DUk/china)
- [Colombia](https://apptail.io/app/function-calc-DUk/colombia)
- [Cyprus](https://apptail.io/app/function-calc-DUk/cyprus)
- [Czechia](https://apptail.io/app/function-calc-DUk/czechia)
- [Germany](https://apptail.io/app/function-calc-DUk/germany)
- [Denmark](https://apptail.io/app/function-calc-DUk/denmark)
- [Dominican Republic](https://apptail.io/app/function-calc-DUk/dominican-republic)
- [Algeria](https://apptail.io/app/function-calc-DUk/algeria)
- [Ecuador](https://apptail.io/app/function-calc-DUk/ecuador)
- [Egypt](https://apptail.io/app/function-calc-DUk/egypt)
- [Spain](https://apptail.io/app/function-calc-DUk/spain)
- [Finland](https://apptail.io/app/function-calc-DUk/finland)
- [France](https://apptail.io/app/function-calc-DUk/france)
- [United Kingdom](https://apptail.io/app/function-calc-DUk/united-kingdom)
- [Greece](https://apptail.io/app/function-calc-DUk/greece)
- [Hong Kong SAR China](https://apptail.io/app/function-calc-DUk/hong-kong)
- [Croatia](https://apptail.io/app/function-calc-DUk/croatia)
- [Hungary](https://apptail.io/app/function-calc-DUk/hungary)
- [Indonesia](https://apptail.io/app/function-calc-DUk/indonesia)
- [Ireland](https://apptail.io/app/function-calc-DUk/ireland)
- [Israel](https://apptail.io/app/function-calc-DUk/israel)
- [India](https://apptail.io/app/function-calc-DUk/india)
- [Iceland](https://apptail.io/app/function-calc-DUk/iceland)
- [Italy](https://apptail.io/app/function-calc-DUk/italy)
- [Jamaica](https://apptail.io/app/function-calc-DUk/jamaica)
- [Japan](https://apptail.io/app/function-calc-DUk/japan)
- [South Korea](https://apptail.io/app/function-calc-DUk/south-korea)
- [Kuwait](https://apptail.io/app/function-calc-DUk/kuwait)
- [Kazakhstan](https://apptail.io/app/function-calc-DUk/kazakhstan)
- [Lebanon](https://apptail.io/app/function-calc-DUk/lebanon)
- [Lithuania](https://apptail.io/app/function-calc-DUk/lithuania)
- [Latvia](https://apptail.io/app/function-calc-DUk/latvia)
- [Madagascar](https://apptail.io/app/function-calc-DUk/madagascar)
- [Malta](https://apptail.io/app/function-calc-DUk/malta)
- [Mexico](https://apptail.io/app/function-calc-DUk/mexico)
- [Malaysia](https://apptail.io/app/function-calc-DUk/malaysia)
- [Nigeria](https://apptail.io/app/function-calc-DUk/nigeria)
- [Netherlands](https://apptail.io/app/function-calc-DUk/netherlands)
- [Norway](https://apptail.io/app/function-calc-DUk/norway)
- [Nepal](https://apptail.io/app/function-calc-DUk/nepal)
- [New Zealand](https://apptail.io/app/function-calc-DUk/new-zealand)
- [Peru](https://apptail.io/app/function-calc-DUk/peru)
- [Philippines](https://apptail.io/app/function-calc-DUk/philippines)
- [Pakistan](https://apptail.io/app/function-calc-DUk/pakistan)
- [Poland](https://apptail.io/app/function-calc-DUk/poland)
- [Portugal](https://apptail.io/app/function-calc-DUk/portugal)
- [Romania](https://apptail.io/app/function-calc-DUk/romania)
- [Russia](https://apptail.io/app/function-calc-DUk/russia)
- [Saudi Arabia](https://apptail.io/app/function-calc-DUk/saudi-arabia)
- [Sweden](https://apptail.io/app/function-calc-DUk/sweden)
- [Singapore](https://apptail.io/app/function-calc-DUk/singapore)
- [Slovakia](https://apptail.io/app/function-calc-DUk/slovakia)
- [Senegal](https://apptail.io/app/function-calc-DUk/senegal)
- [Thailand](https://apptail.io/app/function-calc-DUk/thailand)
- [Türkiye](https://apptail.io/app/function-calc-DUk/turkey)
- [Taiwan](https://apptail.io/app/function-calc-DUk/taiwan)
- [Ukraine](https://apptail.io/app/function-calc-DUk/ukraine)
- [South Africa](https://apptail.io/app/function-calc-DUk/south-africa)
- [United Arab Emirates](https://apptail.io/app/function-calc-DUk/united-arab-emirates)
- [Uzbekistan](https://apptail.io/app/function-calc-DUk/uzbekistan)
- [Vietnam](https://apptail.io/app/function-calc-DUk/vietnam)
- [Uganda](https://apptail.io/app/function-calc-DUk/uganda)

---

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