You may notice that the “optimal” or “in-range” glucose values shown in the Vively app differ from those shown in the Sibionics GS3 app. This is expected — and it doesn’t mean your sensor readings are incorrect.
The difference exists because Vively and the GS3 app are designed for different purposes and user groups, even though they are reading the same underlying glucose data.
1. Different goals lead to different glucose ranges
Vively: wellness-focused optimisation
Vively is a wellness app designed for people using continuous glucose monitoring to better understand how food, sleep, stress, and exercise affect their glucose patterns.
Because of this focus, Vively uses tighter “optimal” glucose ranges that are intended to:
Highlight smaller glucose rises and drops
Encourage steadier glucose patterns
Support metabolic awareness and behaviour change
Help users identify foods or habits that may be less supportive of long-term wellbeing
These ranges are designed for insight and optimisation, not medical management. They help surface patterns that might otherwise be missed if broader ranges were used.
Sibionics GS3 app: diabetes management focus
The Sibionics GS3 app is designed primarily to support diabetes management. As a result, it uses broader default target ranges that are appropriate for clinical glucose management and safety across a wide range of users.
Because of this:
Higher glucose values may still appear “in range” in the GS3 app
The emphasis is on safe, practical day-to-day management
Short-term glucose rises are treated as less significant by default
This approach is appropriate and expected for an app built around diabetes care.
2. “Optimal” in Vively does not mean “normal” or “required”
Vively’s use of the term “optimal” is important to understand.
It is a wellness optimisation range
It is not a diagnostic or medical threshold
It is not a pass/fail assessment
Brief rises outside the optimal range — especially after meals — are completely normal
The purpose of the optimal range is to help you interpret trends and make lifestyle adjustments, not to suggest that anything outside the range is inherently “bad” or harmful.
3. Your glucose value hasn’t changed — only the interpretation has
If you’re viewing the same moment in both apps:
The glucose number itself is identical
The label applied to that number may differ
For example, a glucose reading might:
Be shown as “in range” in the GS3 app
Be shown as “above optimal” in Vively
This reflects different interpretation frameworks, not differences in sensor accuracy.
4. Which range should you pay attention to?
If you’re using Vively for wellness, lifestyle insights, and metabolic optimisation, we recommend using Vively’s optimal ranges as your primary reference.
They are designed to help you:
Compare the impact of different meals
Understand how sleep or stress affects your glucose
Track improvements in glucose stability over time
Make practical, sustainable lifestyle changes
5. Key takeaway
Different apps use different glucose ranges because they are designed for different goals.
The Sibionics GS3 app uses broader ranges appropriate for diabetes management.
Vively uses tighter “optimal” ranges designed to support wellness-focused insights
and lifestyle optimisation for non-diabetic use.
Both apps display the same glucose data — they simply interpret it differently.