---
title: "Bell Curves - graphing calculator for the normal distribution fu - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "* Build interactive graphs of the probability density function (PDF) the cumulative distribution function (CDF)  for normal distributions * Fit normal and lognormal sample data from CSV files * Visual"
---

# Bell Curves - graphing calculator for the normal distribution fu — United States

![Bell Curves App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple5/v4/18/4b/49/184b49fb-9e87-ed92-627c-51b82531eb08/mzl.akgbstqo.png/434x0w.png)

**Developer:** [Iaroslav Mironov](https://apptail.io/developer/iaroslav-mironov-XaG)
**Category:** Education
**Rating:** 3.0/5 (2 ratings)
**Price:** Free
**Bundle ID:** com.ioptioneer.bellcurves
**Store:** Apple App Store
**Country:** United States
**Version:** 1.3.9 (released 2015-06-18)
**Original Release:** 2014-01-05
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id783996056)
**AppTail Page:** [https://apptail.io/app/bell-curves-graphing-calculator-for-the-normal-distribution-function-eRfc/united-states](https://apptail.io/app/bell-curves-graphing-calculator-for-the-normal-distribution-function-eRfc/united-states)

## Bell Curves Description
* Build interactive graphs of the probability density function (PDF) the cumulative distribution function (CDF)  for normal distributions
* Fit normal and lognormal sample data from CSV files
* Visually compare sample distribution with PDF function
* Solve PDF/CDF equations graphically 
* Calculate the sigmas and quantiles

Bell Curves is an interactive graphing tool and calculator for the bell curve probability density function.

## Bell Curves Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple7/v4/01/c9/b2/01c9b2b5-6449-b163-3bf9-9b5ef6be5dc7/mzl.pcllidru.png/640x960.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple7/v4/65/a0/a1/65a0a1e5-c06f-129f-1fab-0a7a4cbf6e1a/mzl.wwncxmhx.png/640x960.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/Purple1/v4/e9/43/4d/e9434d71-18e4-d2e1-148e-865d4563be7f/mzl.qnzbzqwb.png/640x960.png)

## Bell Curves Rating Breakdown in United States
- 5 stars: 1 (50%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 1 (50%)

## Bell Curves Reviews in United States

### ***** "Great Statistics App to understand a PDF and a CDF"
Great Statistics App to understand/ teach the PDF and  CDF concepts. Easy to import data. App helps you understand and visualize what happens to the PDF and CDF if you gradually change the mean, sigma, etc. A very simple App but enlightening.
-- reybako, 2018-01-22

### ****- "Nice"
Nice app that explains everything to you. So even of you don't know how to read the graph it tells you. Good for statistics students who don't have a graphing calculator plus it will help explain stuff to them.
-- Jessiewoowoo31, 2014-05-15

### ****- "Bell curves"
This is a really good app to save money with. Graphing calculators are super expensive and you probably wouldn't need later on in life. It's best to use if you specifically need to calculate bell curves. However, that's just the whole function of the app - nothing else. Still super helpful and accurate though. It can be a potential of saving a lot of money.
-- Leilax, 2014-05-07

### ****- "Great Side App"
This app is not for everyone. While it looks confusing and the scope may seem narrow it does exactly what it needs to do and is a very nice tool to keep by your side if you do not have a high end TI calculator.  I wish it allowed more log functions, but is a great app none the less.
-- Moontelly, 2014-05-07

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

## Bell Curves In-App Purchases
| Item | Price |
|------|-------|
| Pro Pack | $1.99 |



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## Bell Curves Available In
- [United States](https://apptail.io/app/bell-curves-graphing-calculator-for-the-normal-distribution-function-eRfc/united-states)
- [France](https://apptail.io/app/bell-curves-graphing-calculator-for-the-normal-distribution-function-eRfc/france)
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---

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