Simple, free insulin helper
Carbs in → Suggested insulin out.
GlucoGuide helps you estimate insulin based on your carbs and blood glucose — quickly and without ads. Built to be simple for everyday use.
Stay in the loop
Subscribe in the next few days to get app updates, new features, and service notices if we ever have to move.
FastEnter carbs & BG, see an estimate
FlexibleUSDA foods optional with a free key
PrivateNo ads; your data stays on your device
In Beta: we’d love your feedback.
- Was it easy to use?
- Any bugs or confusing steps?
- Anything you wish it did?
Once we’ve gathered enough input, we’ll release device installers — still free and ad‑free.
Safety: GlucoGuide is not a medical device or medical advice. Confirm doses with your diabetes care team.
How it works
1) Set your clinician values
Enter your insulin‑to‑carb ratio (ICR), correction factor (ISF), target BG, units (mg/dL or mmol/L).
Enter your insulin‑to‑carb ratio (ICR), correction factor (ISF), target BG, units (mg/dL or mmol/L).
2) Add your food
Type carbs directly or pick a food; optionally use USDA search with a free API key.
Type carbs directly or pick a food; optionally use USDA search with a free API key.
3) Calculate
See the food dose, correction dose, and an estimate that considers active insulin (IOB).
See the food dose, correction dose, and an estimate that considers active insulin (IOB).
Why it’s free
No ads. No trackers. If it helps you, you can support development with a small one‑time donation. Reviews help others find it.
Is this medical advice?
No. This is an educational tool. Always confirm with your healthcare team.
Do I need an account?
You can try the app on this site for free. Accounts let you save preferences and access future apps.