# CGMSIM — Type 1 Diabetes Simulation

> Type 1 Diabetes simulation for managing glucose levels with meals and insulin. (iPhone/iPad app by Lorenzo Sandini.)

- Source: https://appshunter.io/ios/app/cgmsim/id1667105182 (this page in markdown: same URL + `.md`)
- Developer: [Lorenzo Sandini](https://appshunter.io/developer/1667105184)
- Category: Education, Medical
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 12+
- Requires: iOS 15.1 · 43 MB
- Languages: American English
- Released: 2024-12-23
- Data updated: 2026-07-08
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/cgmsim/id1667105182/reviews.md

## What is CGMSIM?

CGMSIM lets you create a virtual Type 1 Diabetes subject, that you'll treat 24/7 with meals, multiple daily insulin injections (MDI) or a virtual insulin pump (CSII - continuous subcutaneous insulin infusion). Your goal is to maintain your virtual subject's glycemia in the treatment range 70-180 mg/dl (3.9 - 10 mmol/l) at least 70% of the time, with as few low glucose values as possible. Optional hypo- and hyperglycemia are delivered as push notifications and email alerts. CGMSIM imports your Fitbit® activity tracker's or Google Fit® activity data (steps, heart rate), which influence your subject's glycemic status. The CGM trace is displayed in Nightscout, where success reports can be generated.

## Key features

- Virtual Type 1 Diabetes subject management
- Meal and insulin administration (MDI/CSII)
- Glycemic target range maintenance
- Hypo/hyperglycemia alerts
- Activity tracker integration (Fitbit, Google Fit)
- Nightscout CGM trace display
- Success report generation

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/cgmsim/id1667105182/reviews.md

### 5/5 — Cgmsim

*2025-09-23*

I love the idea of type one diabetes simulation on Nightscout thank you for making this work

## Frequently asked questions about CGMSIM

### What is CGMSIM?

CGMSIM is a simulation app that allows users to manage a virtual Type 1 Diabetes subject. You administer meals and insulin, aiming to keep blood glucose within a target range.

### How does CGMSIM help with learning?

It provides a safe environment to practice diabetes management strategies, understand the impact of meals and insulin, and observe glucose trends without real-world consequences.

### Can CGMSIM integrate with my fitness tracker?

Yes, CGMSIM can import activity data such as steps and heart rate from Fitbit and Google Fit, which influences the virtual subject's glycemic status.

### What is the target glucose range in CGMSIM?

The goal in CGMSIM is to maintain the virtual subject's glycemia in the treatment range of 70-180 mg/dl (3.9 - 10 mmol/l) at least 70% of the time.

### Does CGMSIM have ads?

No, CGMSIM is ad-free, providing an uninterrupted simulation experience for users.

### Is CGMSIM available on Android?

Based on the provided data, CGMSIM is supported on iPhone, iPad, and iPod. Platform availability for Android is not specified.

### How often is CGMSIM updated?

The latest version is 0.0.56, released on 2026-02-04. This indicates active development, though specific update frequency is not detailed.

### What is the age rating for CGMSIM?

CGMSIM has an age rating of 12+, making it suitable for younger users interested in learning about diabetes management.

## Version history (last 5 releases)

### 0.0.56 — 2026-02-04

We improved and simplified the onboarding experience, and added a coaching functionality that will guide you through your progression in CGMSIM. You'll receive optional rich notifications containing reminders, cheers and nudges. Also, we added optional CGM sensor and insulin pump reservoir tracking. You'll have to replace virtual sensors and refill virtual reservoirs, other wise your CGM curve and your insulin infusion will be interrupted.

### 0.0.47 — 2025-10-27

We added deep links facilitating the return to the app from the sign-up confirmation email. Also fixed some internal links.

### 0.0.40 — 2025-09-21

We added a new difficulty level in our simulation: the Expert Mode. This allows you the select one of 3 different semi-automatic closed-loop insulin dosing models, for which you'll have to find the optimal settings.

### 0.0.37 — 2025-04-14

The Bolus Wizard calculation bug is fixed. Logout correctly cleans the AsyncStorage. Prednisone "units" are now corrected to "milligrams".

### 0.0.36 — 2025-03-03

This new version was built using Expo SDK 51, with dependency updates for security and stability. 

A link to the documentation has been added in the Home view.

Selecting a difficulty mode (Beginner, Intermediate and Advanced) is easier than before, with buttons on the profile page. The visually improved Careportal allows declaring meals, insulins and setting up the virtual insulin pump in a simpler and more intuitive way.

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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 2026-07-08.*