# HbA1c > Converts HbA1c to estimated average blood glucose and vice versa. (iPhone/iPad app by rabidmoose.) - Source: https://appshunter.io/ios/app/hba1c/id422361294 (this page in markdown: same URL + `.md`) - Developer: [rabidmoose](https://appshunter.io/developer/422361297) - Category: Health & Fitness, Medical - Price: Free - Rating: 3.30/5 from 7 App Store ratings · 9 written reviews indexed - Age rating: 12+ - Requires: iOS 7.0 · 4 MB - Languages: American English - Released: 2011-04-01 - Data updated: 2026-06-04 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/hba1c/id422361294/reviews.md ## What is HbA1c? This app converts your HbA1c level (either DCCT Percentage or IFCC mmol/mol) to estimated average blood glucose (eAG) levels (either in mmol/l or mg/dl) and vice versa. Although there are a few methods and equations commonly used to convert these levels from one to another, this application adopts the equation suggested by the ADA (American Diabetes Association) This application ensures that percentages do not exceed 100 (in the case of DCCT percentage HbA1c levels) and that negative or zero values are not input. However, this application does not place any other restrictions on the values entered for conversion, but HbA1c ranges of less than 3.3% / 13.7 mmol/l or more than 19.1% / 185 mmol/mol are not only unrealistic but likely to be inaccurate. All values converted are presented to two decimal places. IMPORTANT : By using this application, you agree that no information presented to you constitutes medical advice and that any information presented to you will not form the basis for any medical treatment. While every effort has been made to ensure that the information presented by this App is accurate, the developer and their agents can not accept any liability or responsibility for erroneous results.You agree that this App is not and can not be a substitute for care from a medical professional. ## Key features - HbA1c to eAG conversion - eAG to HbA1c conversion - Supports DCCT Percentage and IFCC mmol/mol - Supports mmol/l and mg/dl units - Uses ADA-recommended equation - Results displayed to two decimal places ## Recent user reviews (9 of 9) All indexed reviews: https://appshunter.io/ios/app/hba1c/id422361294/reviews.md ### 1/5 — A1c *2020-11-27, version 1.01* Did not give me my A1c it gives other indications that I’m not interested in all I want is A1c calculated. ### 5/5 — Trivial but exactly what I want *2020-02-02, version 1.01* Years ago I learned the formulas to convert: eA1c=(eAG +46.7)/28.7 and eAG=(eA1c*28.7)-46.7 I used those formulas whenever I tracked my readings in a spreadsheet. However now that I use a CGM and its reports instead of a spreadsheet for tracking, I found those reports only show glucose and not A1c. This app solved that by using the exact same formulas above, so I’m giving it Kudos and 5 stars. 🙂 ### 1/5 — Unusable *2015-11-28, version 1.0* Don't bother downloading this. It should be a simple stable app as it only involves one simple calculation. It crashes-continuously -simply unusable ### 1/5 — Doesn't work *2015-03-27, version 1.0* The only thing that works is the iAd... This app needs to be pulled. ### 1/5 — App not working *2015-01-19, version 1.0* App not working ### 1/5 — Problem *2014-10-31, version 1.0* This app won't allow me to enter any data . It's as if it frozen or doesn't work? I don't have a problem with any other app so it's not my phone.. ### 2/5 — needs conversion of mmol/mol *2013-01-14, version 1.0* The app needs a screen-picture where eAG is plotted against A1c with reference to non-diabetic range and to ADA goals. The number has no meaning if it does not have perspective where the given A1c is situated compared to normal. ### 3/5 — Almost Perfect *2012-06-05, version 1.0* I really like this app. It's simple to use and provides immediate results. Only thing keeping me from giving it five stars is having to re-choose my measurement parameters every time I use it. If I could choose my parameters once and set them as permanent defaults, this app would be five stars all the way. ### 1/5 — Poor *2011-06-16, version 1.0* App won't even open before it crashes so don't waste your time down loading. Shame I had to give it 1 star as can't gone it 0 or -5. ## Frequently asked questions about HbA1c ### What is HbA1c? HbA1c is a measure of your average blood glucose (sugar) levels over the past 2 to 3 months. It is reported as a percentage or in mmol/mol. ### What is estimated average blood glucose (eAG)? eAG is a way to express your HbA1c result in terms of average blood glucose levels, making it easier to understand in familiar units like mg/dL or mmol/L. ### Does HbA1c provide medical advice? No, HbA1c explicitly states that no information presented constitutes medical advice. It is a tool for conversion and estimation only, and not a substitute for care from a medical professional. ### What equation does HbA1c use for conversion? This application adopts the equation suggested by the American Diabetes Association (ADA) for converting between HbA1c and estimated average blood glucose levels. ### What are the limitations of the values entered into HbA1c? The app ensures percentages do not exceed 100 and negative or zero values are not input. However, it does not place other restrictions, though ranges outside 3.3%-19.1% (DCCT) or 13.7-185 mmol/mol (IFCC) are considered unrealistic. ### On what devices can I use HbA1c? HbA1c is supported on iPhone and iPod devices. It was last updated on January 8, 2016, with version 1.01. ### What is the rating for HbA1c? HbA1c has a rating of 3.3 stars from 7 ratings. The app is rated for ages 12 and up. ### Does HbA1c have ads? No, HbA1c does not contain advertisements. It is a free application with no in-app purchases. ## Version history (last 2 releases) ### 1.01 — 2016-01-08 This app has been updated by Apple to display the Apple Watch app icon. Bug fixes, Support for iOS 9. ### 1.0 — 2011-04-01 No release notes. ## Apps similar to HbA1c | App | Rating | Price | Category | | --- | --- | --- | --- | | [Sukar – Daily Diabetes Tracker](https://appshunter.io/ios/app/sukar-daily-diabetes-tracker/id1509860409) | 5.0 (2) | Free | Health & Fitness | | [Sukari - diabetes control](https://appshunter.io/ios/app/sukari-diabetes-control/id1596299604) | 5.0 (1) | Free | Health & Fitness | | [CampViews](https://appshunter.io/ios/app/campviews/id1146970452) | 5.0 (6) | Free | Health & Fitness | ## Related topics [hba1c](https://appshunter.io/ios/topics/hba1c) · [calculadora hba1c](https://appshunter.io/ios/topics/calculadora-hba1c) --- *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 2026-06-04.*