# ARL simulator EWMA control chart

> ARL simulator EWMA control chart (iPhone/iPad app by Francisco Aparisi.)

- Source: https://appshunter.io/ios/app/arl-simulator-ewma-control-chart/id1088604146 (this page in markdown: same URL + `.md`)
- Developer: [Francisco Aparisi](https://appshunter.io/developer/1084055472)
- Category: Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 7.0 · 43 MB
- Languages: English
- Released: 2016-03-03
- Data updated: 2026-06-10
- User reviews in markdown: https://appshunter.io/ios/app/arl-simulator-ewma-control-chart/id1088604146/reviews.md

## What is ARL simulator EWMA control chart?

This application simulates the ARL of an EWMA control chart for different smoothing and control limits. The 4 available combinations of smoothing and control limits that yield an in-control ARL of 370.

The EWMA control chart is one of the tools of statistical process control (SPC) or quality control.

It is possible to change the value of the mean and sigma of the Normal distribution used in the simulation. Concretely, the shifts are measured by  d = (m1 - m0) / sigma0 and by r = sigma1 / sigma0.

There is a twin application for OS X available in its store.

At this moment the available languages are Spanish and English.


## Version history (last 1 release)

### 1.1 — 2016-04-06

This app has been updated by Apple to display the Apple Watch app icon.

bugs fixed. better icons for iPad

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## More apps by Francisco Aparisi

- [Power of Hypothesis Testing](https://appshunter.io/ios/app/power-of-hypothesis-testing/id1084055473)
- [Calculator Xbar and S Charts](https://appshunter.io/ios/app/calculator-xbar-and-s-charts/id1085185552)
- [ARL Xbar Control Chart](https://appshunter.io/ios/app/arl-xbar-control-chart/id1085519193)
- [XBar control chart with VSS](https://appshunter.io/ios/app/xbar-control-chart-with-vss/id1085694274)
- [Optimum EWMA control chart](https://appshunter.io/ios/app/optimum-ewma-control-chart/id1088666755)

All apps by Francisco Aparisi: https://appshunter.io/developer/1084055472

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*