# Epi Info Companion > Mobile data collection, analysis, and statistical calculation for public health. (iPhone/iPad app by Centers for Disease Control and Prevention.) - Source: https://appshunter.io/ios/app/epi-info-companion/id762428884 (this page in markdown: same URL + `.md`) - Developer: [Centers for Disease Control and Prevention](https://appshunter.io/developer/439259253) - Category: Productivity - Price: Free - Rating: 2.80/5 from 10 App Store ratings · 4 written reviews indexed - Age rating: 4+ - Requires: iOS 12.1 · 18 MB - Languages: English - Released: 2013-12-06 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/epi-info-companion/id762428884/reviews.md ## What is Epi Info Companion? The Epi Info™ app will be retired on February 28th, 2025. Thank you for using Epi Info™! Data Entry Allows the user to collect data on the mobile device using a form created with Epi Info 7 on a desktop PC. Features include: • Importing a collection form via the device’s native email app • Opening saved forms • Entering new records to be stored on the device • Recalling and updating or deleting existing records • Packaging and encrypting local datasets for import to PC Epi Info 7 projects Data Analysis Allows the user to read and analyze locally-stored datasets. Features include: • Storing comma-delimited tables to the local Epi Info SQLite table via email • Frequency analysis • 2x2 or MxN tables and associated statistics • Means and associated statistics • Deleting local SQLite tables from the device StatCalc StatCalc statistical calculators have long been a feature of CDC's Epi Info desktop software. Each calculator has been adapted for iOS and is included in this app. The app controls and facilitates user inputs by taking advantage of the iPad's touchscreen interface and using input devices such as sliders and steppers. Included calculators are: • 2x2xn calculator with associated confidence intervals and statistical tests • Pair-matched case control 2x2 calculator with associated confidence intervals and statistical tests • Chi-square calculator for trend detection • Binomial calculator for determining the probability of an observed proportion • Poisson calculator for determining the probability of an observed number of successes • Sample size calculators: • For unmatched case-control studies • For cohort studies • For population surveys VHF Contact Tracing Allows the user to load a dataset of contacts of Viral Hemorrhagic Fever cases, select records from that dataset, enter follow-up information for a record, transmit the follow-up information to a master database via SMS, and save the follow-up information to the local data table. Limitation of Liability: The materials embodied in the Epi Info™ Mobile Application are "as-is" and without warranty of any kind, express, implied or otherwise, including without limitation, any warranty of fitness for a particular purpose. In no event shall the Centers for Disease Control and Prevention (CDC) or the United States (U.S.) Government be liable to the user or to anyone else for any direct, special, incidental, indirect or consequential damages of any kind, or any damages whatsoever, including without limitation, loss of profit, loss of use, savings or revenue, loss of data or the claims of third parties, whether or not CDC or the U.S. Government has been advised of the possibility of such loss, however caused and on any theory of liability, arising out of or in connection with the possession, use or performance of this software. Privacy Policy: CDC does not collect any user information, personal or otherwise, when you use this mobile application. ## Key features - Mobile data collection via imported forms - Record entry, update, and deletion - Local dataset encryption for PC import - Frequency analysis and table statistics - Integrated statistical calculators (StatCalc) - Viral Hemorrhagic Fever contact tracing ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/epi-info-companion/id762428884/reviews.md ### 2/5 — Crashes *2020-10-25* I have tried several times exporting the data to my email or through fav and the app crashes. When clicking on app support, I am sent to a page that says error ### 5/5 — Thanks for your update！ *2020-03-26* Excellent tools！But when I use it in my clinical works, I always face the problems of merge and synchronization that I must use android device. We hope updates in android! ### 1/5 — Experiencing crashing *2019-11-22* As of November 21, 2019 The app is crashing on me consistently What I’m doing is: 1) go to statcalc 2) select 2x2xn 3) if you try to select column 2,3,4,5, or summary The app will crash Running on: iPhone 11 Pro Max IOS 13.3 ### 2/5 — Better than before but still needs work *2015-02-07* First off, I love that someone/several someone's are working on this! Still the iApp needs to be able to: (1) upload forms using a weblink or the ability to design forms within the app - can someone add And (2) a function to share the data collected with other devices without overwriting other existing datasets ## Frequently asked questions about Epi Info Companion ### What is Epi Info Companion? Epi Info Companion is a mobile application designed for data collection and analysis in public health research. It allows users to create and import data collection forms, enter records, perform statistical calculations, and assist with contact tracing. ### What devices does Epi Info Companion support? Epi Info Companion is available for iPhone, iPad, and iPod devices. ### Is Epi Info Companion free to use? Yes, Epi Info Companion is a free application. It does not require any payment to download or use its features. ### Does Epi Info Companion have ads? No, Epi Info Companion does not contain advertisements. It is an ad-free application. ### How often is Epi Info Companion updated? The latest version of Epi Info Companion is 5.5.18, which was last updated on February 26, 2025. While specific update frequency isn't detailed, this indicates ongoing support. ### What kind of statistical calculators are included in Epi Info Companion? Epi Info Companion includes various statistical calculators such as 2x2xn, pair-matched case control, chi-square for trend detection, binomial, Poisson, and sample size calculators for different study types. ### Can I export data from Epi Info Companion? Yes, Epi Info Companion allows you to package and encrypt local datasets for import to PC Epi Info 7 projects. It also supports storing comma-delimited tables to local SQLite tables via email. ### What is the age rating for Epi Info Companion? Epi Info Companion has an age rating of 4+, making it suitable for a wide range of users, including children. ## Version history (last 5 releases) ### 5.5.18 — 2025-02-26 • The Epi Info™ app will be retired on February 28th, 2025. Thank you for using Epi Info™! ### 5.5.17 — 2025-02-04 • Thank you for using Epi Info. Please note that the Main Menu Screen features a link to a tutorial on using the app. • This version makes minor changes to two of the included sample survey forms. ### 5.5.16 — 2025-01-21 • Thank you for using Epi Info. Please note that the Main Menu Screen features a link to a tutorial on using the app. • This version contains Voice Over accessibility improvements. ### 5.5.15 — 2024-03-29 • Thank you for using Epi Info. Please note that the Main Menu Screen features a link to a tutorial on using the app. • This version sorts the list of stored forms when importing data from a sync file. ### 5.5.14 — 2024-01-18 • Thank you for using Epi Info. Please note that the Main Menu Screen features a link to a tutorial on using the app. • Added Spanish labels when language setting is Spanish. • Removed image files from Sync and CSV emails and added separate feature for emailing images. • Improved write and read with Box cloud. • Batch-pull all images associated with a form from Box. • Optimized for first using Box Dashboard to create form folders before sending data and images to Box. (Please see the “Pushing Data to Box Cloud File Sharing Service” section of the tutorial for details.) ## Apps similar to Epi Info Companion | App | Rating | Price | Category | | --- | --- | --- | --- | | [Listening: Text to Speech](https://appshunter.io/ios/app/listening-text-to-speech/id1635430768) | 4.4 (1,291) | Free | Productivity | | [Lucidchart](https://appshunter.io/ios/app/lucidchart/id611543423) | 4.6 (5,324) | Free | Productivity | | [Mind Map Maker - Mindomo](https://appshunter.io/ios/app/mind-map-maker-mindomo/id526684279) | 4.7 (464) | Free | Productivity | | [SimpleMind - Mind Mapping](https://appshunter.io/ios/app/simplemind-mind-mapping/id305727658) | 4.5 (972) | Free | Productivity | | [GIC Collect](https://appshunter.io/ios/app/gic-collect/id1485932698) | 4.4 (132) | Free | Productivity | | [Rayyan](https://appshunter.io/ios/app/rayyan/id1581620841) | 3.8 (22) | Free | Productivity | ## More apps by Centers for Disease Control and Prevention - [CDC](https://appshunter.io/ios/app/cdc/id487847188) - [Solve the Outbreak](https://appshunter.io/ios/app/solve-the-outbreak/id592485067) - [Contraception](https://appshunter.io/ios/app/contraception/id595752188) - [STI Tx Guide](https://appshunter.io/ios/app/sti-tx-guide/id655206856) - [Ladder Safety](https://appshunter.io/ios/app/ladder-safety/id658633912) - [Prevent Group B Strep(GBS)](https://appshunter.io/ios/app/prevent-group-b-strepgbs/id689290789) All apps by Centers for Disease Control and Prevention: https://appshunter.io/developer/439259253 --- *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.*