Comparison

CGMSIM vs T1 Masters

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CGMSIM

Simulate managing Type 1 Diabetes by administering meals and insulin. Maintain target blood glucose levels while minimizing lows and highs. Integrate activity data for a realistic experience.

Highlights
  • 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
Features
Read full description

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.

About

T1 Masters

Features
Read full description

Managing does not have to feel overwhelming. The Unstoppable app is designed to simplify care and make you feel confident in your journey. Whether you are living with Type 1, Type 2, or supporting someone with, this app offers step by step guidance, tools, and education to help you take control of your health. Who is this app for People living with Type 1 People living with Type 2 Parents, caregivers, and family members Healthcare professionals looking for structured patient education Key Features Expert Led Courses Get access to structured learning programs designed by certified educators and experts. The courses are easy to follow and focus on practical strategies you can apply in daily life. Insulin and Carb Management Tools Learn how to calculate your insulin doses correctly, understand insulin to carb ratios, and adjust your doses safely based on your lifestyle. Blood Sugar Tracking and Logs Keep your glucose levels in check by using simple logs and trackers. Identify trends and make informed decisions. Meal Planning and Nutrition Support Get guides on balanced eating, carb counting, and smart swaps that help you keep your sugars in range while enjoying your favorite foods. Lifestyle and Mindset Guidance Explore tips on exercise, sleep, stress management, and mental health for a complete approach to care. Community Support Join our growing community. Share experiences, find motivation, and stay connected. Why Choose Unstoppable Real world easy to understand tools and methods Practical advice not just theory Evidence based courses trusted by thousands Our Mission At Unstoppable we believe blood sugars should not stop you from living a full happy and healthy life. Our mission is to empower you with the right knowledge tools and mindset to manage your blood sugars confidently. Disclaimer This app is intended for educational purposes only. It is not a replacement for medical advice or treatment. Please consult your healthcare provider before making any changes to your management plan.

Screenshots

CGMSIM4 screens
T1 Masters4 screens

Verdict

The call

The clearest difference is in-app purchases: CGMSIM at none against T1 Masters's 1. CGMSIM also leads on update cadence (every 2 months vs every 8 months) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. T1 Masters sells 1 one-off in-app purchase. CGMSIM asks for nothing beyond the download.

UpkeepUpdate frequency

CGMSIM ships an update every 2 months, T1 Masters every 8 months. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

Scorecard3 real differences · 7 level
CGMSIM versus T1 Masters: the parameters behind the verdict, then further details
ParameterCGMSIMT1 Masters
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 2 months — betterEvery 8 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better16.4
Further details — not scored
Size43 MB84 MB
Age rating12+17+
DeveloperLorenzo SandiniTagMango Inc

In-app purchases

None

CGMSIM

No in-app purchases

1 purchases

T1 Masters

One-time1
  • Mastering your a1c$69.99

Questions

Is CGMSIM free?
CGMSIM is free to download, with no in-app purchases.
Is T1 Masters free?
T1 Masters is free to download, with in-app purchases available.
Do CGMSIM or T1 Masters have ads?
Neither CGMSIM nor T1 Masters shows ads.
Which is updated more often, CGMSIM or T1 Masters?
CGMSIM ships an update every 2 months, and T1 Masters every 8 months. Most recently, CGMSIM was updated on October 24, 2026 and T1 Masters on October 16, 2026.

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