Logged in a few taps
A meter-style ruler, carbs and insulin in one sheet. The app suggests the measurement context from the time of day and your last meal.
Coming soon to the App Store · iPhone
Your glucose, under glass
SugarGlass is a blood sugar diary for iPhone. Log readings, carbs and insulin in a few taps, with clear charts and targets from clinical guidelines.
- Free
- No sign-up
- No ads
- Data stays on your iPhone
In plain sight, under control
Every reading, every carb and every dose right in front of you — and the whole week on a single screen.
See what’s going on
Time in range, estimated A1c, variability and your typical day — what your endocrinologist looks at.
Only on your iPhone
No account, no cloud. Your diary lives on the device, and you can send it to your doctor as a CSV file.
What SugarGlass does
Everything for a daily type 1 or type 2 diabetes log — and nothing you don’t need.
What matters, up front
Your latest reading, big and color-coded, with the change since the previous one. Below it, a 24-hour sparkline and today at a glance.
- Today’s average, readings in range, carbs and insulin
- Entries grouped by day with a daily average
- Deleted by mistake? Undo with one tap
Log it in a few taps
Scroll the ruler like on a meter or type the number. Carbs and insulin go in the same sheet.
- Fasting, before meal, after meal, bedtime, night
- Carbs in grams or bread units
- Rapid- and long-acting insulin with the names of your medications
Time in range and estimated A1c
A day, a week, two weeks, a month or three — the numbers you discuss with your endocrinologist.
- Ranges from the international consensus, from very low to very high
- Glucose variability (CV) and the number of lows
- Daily insulin and carbs
See when glucose drifts off target
Your typical day: every reading of the period on one 24-hour axis. The median and spread show which hours need attention.
- Average by time of measurement compared with your targets
- Separate targets before and after meals
Targets from clinical guidelines
Start from the ADA Standards of Care or the Russian guidelines, where glucose targets follow the A1c goal your doctor set — or enter your own.
- ADA Standards of Care 2026
- Russian clinical guidelines
- Softer targets for older adults and a high risk of lows
Reminds you to check — and pulls in your CGM
Scheduled checks, a check 1–2 hours after meals and your basal insulin. Tap a reminder and a new entry opens.
- Glucose, carbs and insulin are saved to Apple Health
- Readings from meters and CGMs that write to Health show up in your diary
- mg/dL and mmol/L, light and dark mode
Your diary is yours alone
SugarGlass needs no account and never uploads your readings. Everything stays on your iPhone, in the app’s protected storage.
- No account, no ads, no tracking
- Readings, doses, notes and diagnosis never leave the device
- CSV export — you decide who gets it
- Anonymous screen statistics with no health data, off with one switch in Profile
Why “sugar glass”
In films, windows shatter without hurting anyone because they are made of sugar glass — clear candy. Fragile yet safe. That’s how glucose control should feel: transparent and gentle.
Frequently asked questions
How much does SugarGlass cost?
It’s free, with no ads.
Do I need an account?
No. Open the app, pick your units and targets, and start logging.
Where is my data stored?
Only on your iPhone. If device backup is on, the diary is included in your backup — Apple manages it and we have no access.
You can export the diary as CSV for your doctor or a spreadsheet in Profile.
Does it work with CGMs and meters?
Yes, through Apple Health. If your sensor or meter app writes glucose to Health, SugarGlass imports those readings. Frequent CGM data is thinned to one reading per hour so the diary stays readable.
Does the app calculate insulin doses?
No. SugarGlass is a diary: it records, summarizes and compares with your targets. Your doctor sets your doses.
Is it a medical device?
No. SugarGlass does not diagnose and does not replace your doctor. Make treatment decisions together with them.
Which units are supported?
Glucose in mg/dL and mmol/L, carbs in grams or bread units (10 or 12 g), and insulin steps from 0.05 to 1 unit for pens and pumps.
When is it coming? What about Android?
SugarGlass is getting ready for the App Store and runs on iPhone with iOS 26 or later. Want to try it early? Write to us and we’ll invite you to TestFlight. There is no Android version yet.
Coming soon to the App Store
Want early access, found a bug or have an idea? Write to us — we answer in English and Russian.