CGMSIM
Lorenzo Sandini Education iPhoneiPadiPod touch
CGMSIM is a free Education app for iPhone and iPad by Lorenzo Sandini. Rated 5.0/5 from 3 ratings. Requires iOS 15.1. Updated February 4, 2026.
- Rating
- 5.0
- 3 ratings
- Price
- Free
- on the App Store
- Size
- 43 MB
- Age 12+
- Updated
- Feb 4
- 2026 · v0.0.56
Screenshots
About 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.
What’s new
Version 0.0.56 · Updated February 4, 2026
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.
App privacy
The developer, Lorenzo Sandini, reported these privacy practices to Apple.
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Health & Fitness: Fitness
- Contact Info: Email Address, Name
- Identifiers: User ID
Used for: App Functionality