# T1D1 Mobile — Type1 Insulin Calc FDA-Cleared > FDA-cleared insulin calculator and tracker for Type 1 Diabetes management. (iPhone/iPad app by T1D1 LLC.) - Source: https://appshunter.io/ios/app/t1d1-mobile/id6752346957 (this page in markdown: same URL + `.md`) - Developer: [T1D1 LLC](https://appshunter.io/developer/1534651712) - Category: Health & Fitness, Medical - Price: Free - Rating: 4.46/5 from 24 App Store ratings · 25 written reviews indexed - Age rating: 12+ - Requires: iOS 15.6 · 45 MB - Languages: English - Released: 2025-10-21 - Data updated: 2026-09-01 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/t1d1-mobile/id6752346957/reviews.md ## What is T1D1 Mobile? T1D1 (Type 1 Diabetes from Day 1), all the essentials you need to get started from day 1 of diagnosis. 100% free - No subscription and no in-app purchases! Who is it for? People with Type 1 Diabetes who… -Need help calculating insulin! -Are newly diagnosed with Type 1 Diabetes -Use multiple daily injections (MDI) of short-acting insulin -Work with School nurses -Have caregivers who assist in diabetes management -Want to send their data to healthcare providers -Are taking a break from using a pump -Count carbs but are NOT on a sliding scale T1D1 implements the bolus dosing calculation as indicated by the American Diabetes Association standards of Care (https://diabetesjournals.org/care/issue/48/Supplement_1) without modifications. T1D1 is intended for people with Type 1 Diabetes aged 2 years and older who use multiple daily injections (MDI) of rapid-acting insulin. The user can calculate insulin doses based on user-entered data, track glucose, insulin, and carb intake, and share information with their healthcare team. Designed to be simple and accessible, T1D1 makes it easier for patients and families to manage the daily math of diabetes. About the creator: My name is Drew Mendelow. I was 13 years old when I was diagnosed with Type 1 Diabetes in 2020. I remember feeling so overwhelmed when I was newly diagnosed and wanted to create an app with just the essentials you need from day 1 of diagnosis. My aim is to make it simple, reliable, and accessible to all… for free! Hope this app makes your life just a little easier. Disclaimer: T1D1 is an FDA-cleared, Class II medical device for over-the-counter use. Before use, a healthcare professional must provide your target blood glucose values, insulin-to-carbohydrate ratios, and correction factor (aka insulin sensitivity factor) to be programmed into the app. While the app is designed to support insulin dosing for individuals with Type 1 Diabetes Mellitus (T1DM) from age 2 and older, for children under 13, a parent or legal guardian must create and manage the account on the child’s behalf. Legal Manufacturer: Comerge AG Bubenbergestrasse 1 Zurich, 8045 Switzerland ## Key features - Insulin dose calculation - Glucose tracking - Insulin intake tracking - Carb intake tracking - Data sharing with healthcare providers - FDA-cleared medical device ## Recent user reviews (10 of 25) All indexed reviews: https://appshunter.io/ios/app/t1d1-mobile/id6752346957/reviews.md ### 5/5 — Best app around for diabetes *2026-08-10, version 20.1.1* This is the best app available for diabetes for calculating the amount of insulin you need based on your carbohydrates. It’s quick and simple. ### 5/5 — Everything I need in order to track my sons insulin and carbs *2026-07-31, version 20.1.1* Great app! So helpful and gives me everything I need in one spot for easy tracking ### 5/5 — ❤️Love the App! *2026-07-22, version 20.1.1* Has been very useful 😊 ### 5/5 — it’s a life saver *2026-07-11, version 20.1.1* i love it and it’s the only way i know how much insulin to give!😭🤣 way easier than doing the math out or trying to figure it out using a regular calculator ### 5/5 — Great T1D App *2026-07-11, version 20.1.1* I have recently switched to shots after about a decade of using a pump. It's been super helpful in the transition from a pump that does a lot of the math to shots. I love that the app tells you how long it’s been since you’ve given yourself some insulin. It would be great if you could set how long your insulin on board lasts and the app could at least help or suggest a calculation that accounts for IOB. But it’s easy enough to just calculate IOB on your own. In summary I love this app, it has been super helpful. ### 5/5 — Auto correct feature👍🏼 *2026-07-10, version 20.1.1* Huge fan of the auto corrective dosing in case of low blood sugar! ### 5/5 — Great app *2026-07-10, version 20.1.1* This is what I’ve been looking for! ### 4/5 — Customer service *2026-06-23, version 20.1.1* Fast and effective customer service. ### 2/5 — Has Shortcomings *2026-05-30, version 20.1.1* T1D1 does a fine job estimating the amount of insulin you need (based on doctor recommended parameters) but it lacks the ability to estimate the amount of active insulin in your system which is a HUGE shortcoming. Without that you run the of overdosing yourself with insulin. If they add this feature it would be a much better (and safer) App. ### 5/5 — Very Helpful App *2026-05-19, version 20.1.1* Some kindhearted people with greats hearts are behind this app. This app has helped streamline so many aspects of being new to T1D for my son and me. And any questions I had were answered promptly, as well as any suggestions I had were met with openness to make changes that benefit us all. ## Frequently asked questions about T1D1 Mobile ### What is T1D1 Mobile used for? T1D1 Mobile is an FDA-cleared medical device designed to help individuals with Type 1 Diabetes calculate insulin doses, track glucose, insulin, and carb intake. It provides essential tools for daily diabetes management, especially for those using multiple daily injections. ### Is T1D1 Mobile free to use? Yes, T1D1 Mobile is 100% free, with no subscriptions or in-app purchases required. The developer aims to make this essential tool accessible to all. ### Who is the target audience for T1D1 Mobile? The app is intended for people with Type 1 Diabetes aged 2 years and older who use multiple daily injections of rapid-acting insulin. This includes newly diagnosed individuals, those working with school nurses, and caregivers assisting with diabetes management. ### Does T1D1 Mobile require any setup from a healthcare professional? Yes, before use, a healthcare professional must provide your target blood glucose values, insulin-to-carbohydrate ratios, and correction factor to be programmed into the app. T1D1 Mobile is a Class II medical device that requires professional input for accurate personalization. ### Can children use T1D1 Mobile? T1D1 Mobile is designed for individuals with Type 1 Diabetes from age 2 and older. For children under 13, a parent or legal guardian must create and manage the account on their behalf. ### How often is T1D1 Mobile updated? The latest version of T1D1 Mobile is 20.1.0, and it was last updated on January 27, 2026. This indicates a commitment to ongoing development and improvements. ### What devices does T1D1 Mobile support? T1D1 Mobile is supported on iPhones and iPods. It is designed to be accessible on popular Apple mobile devices. ### What is the age rating for T1D1 Mobile? T1D1 Mobile has an age rating of 12+. This is likely due to the nature of the medical information and calculations involved in managing Type 1 Diabetes. ## Version history (last 5 releases) ### 20.1.1 — 2026-03-30 Added a resource page. Minor back-end updates ### 20.1.0 — 2026-01-27 Minor updates improving non-critical usability Dependency updates ### 20.0.3 — 2025-12-15 Minor enhancements and updates ### 20.0.2 — 2025-10-24 After 5 years of persistence, T1D1 is back up in the app store with FDA Clearance! It is the ONLY cleared over-the-counter insulin calculator available in the US. This update corrects a minor error in our store listing. ### 20.0.1 — 2025-10-21 No release notes. ## Apps similar to T1D1 Mobile | App | Rating | Price | Category | | --- | --- | --- | --- | | [Enhance-d: Diabetes & Exercise](https://appshunter.io/ios/app/enhance-d-diabetes-and-exercise/id6497331467) | 4.1 (16) | Free | Health & Fitness | | [nutribench](https://appshunter.io/ios/app/nutribench/id6753996139) | 5.0 (1) | Free | Health & Fitness | | [GlucoSense: Diabetes Health](https://appshunter.io/ios/app/glucosense-diabetes-health/id6472184708) | 4.8 (104) | Free | Health & Fitness | | [ViewsEMR](https://appshunter.io/ios/app/viewsemr/id6446182010) | 5.0 (5) | Free | Health & Fitness | ## More apps by T1D1 LLC - [Digest Quest](https://appshunter.io/ios/app/digest-quest/id1589132307) All apps by T1D1 LLC: https://appshunter.io/developer/1534651712 ## Related topics [t1d1](https://appshunter.io/ios/topics/t1d1) · [insulin calculator](https://appshunter.io/ios/topics/insulin-calculator) · [t1d1 mobile](https://appshunter.io/ios/topics/t1d1-mobile) · [t1d1 insulin calculator](https://appshunter.io/ios/topics/t1d1-insulin-calculator) · [insulin calculator correction](https://appshunter.io/ios/topics/insulin-calculator-correction) · [understanding type 1 diabetes](https://appshunter.io/ios/topics/understanding-type-1-diabetes) · [dose calculator insulin](https://appshunter.io/ios/topics/dose-calculator-insulin) · [insulin calculator dosage](https://appshunter.io/ios/topics/insulin-calculator-dosage) · [smart bolus calculator](https://appshunter.io/ios/topics/smart-bolus-calculator) · [bolus](https://appshunter.io/ios/topics/bolus) · [level 1 a diabetes game](https://appshunter.io/ios/topics/level-1-a-diabetes-game) · [t1d](https://appshunter.io/ios/topics/t1d) · [glucose and insulin calculator](https://appshunter.io/ios/topics/glucose-and-insulin-calculator) · [carrywise packing](https://appshunter.io/ios/topics/carrywise-packing) --- *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 2026-09-01.*