How to Track Your Blood Sugar
Build a simple logging routine, learn what the fasting, before, after and bedtime tags mean, and see why consistency matters more than any single reading.
Read guideGlucoLog — A Blood Sugar Tracker That Keeps It Simple
Log your glucose in seconds, see your trends, and share a clear report with your doctor.
GlucoLog is a private blood sugar tracker for iPhone. Record each reading with a large-button numpad, tag it by meal context, and watch your patterns take shape across 7-day to 1-year charts. It does not measure your glucose — you enter readings from your meter or CGM, and GlucoLog helps you make sense of them. This is general health information, not medical advice.
- Tag readings by meal — fasting, before, after, bedtime — in mg/dL or mmol/L
- See time in range and an estimated A1C from your own readings
- Export a PDF or CSV doctor report and sync with Apple Health
Download GlucoLog Free
GlucoLog is free to download on iOS 17 and above. Log your blood sugar in seconds, tag each reading by meal context, follow your trends and time in range, and generate a doctor-ready PDF or CSV — all from your iPhone. GlucoLog Premium unlocks the full reading history, unlimited reports and a medication tracker, with a 7-day free trial. Your data stays on your device and in your own iCloud.
Free to download · iOS 17+
See GlucoLog in Action
Your dashboard at a glance: last reading, daily average, time in range, a 7-day trend and your estimated A1C.
Every reading, grouped by day and filterable by meal context — fasting, before meal, after meal or bedtime.
Trend charts from 7 days to 1 year, with your average, range and a clear time-in-range breakdown.
Build a doctor report in PDF or CSV — choose the date range and what to include, then generate.
How GlucoLog Works
1
Log your reading in seconds
Take your value from your glucose meter or CGM and enter it with the large-button numpad in either mg/dL or mmol/L. GlucoLog does not measure blood sugar itself — it records the number you enter so you can build a clear history.
2
Tag it with meal context
Mark each reading as fasting, before meal, after meal or bedtime, and add a note or custom tag if you like. That context is what turns a list of numbers into a pattern you and your doctor can actually read.
3
Watch your trends and time in range
Your dashboard shows a 7-day trend, while the Charts tab opens 7-day to 1-year views with your average, minimum, maximum and a time-in-range breakdown. GlucoLog also shows an estimated A1C from your recent readings.
4
Share a report with your doctor
When it is time for an appointment, generate a compact or detailed PDF report, or export a CSV. Choose the date range and what to include, then share it. Everything stays on your device and in your own iCloud.
Guides: Tracking, Trends, Estimated A1C and Doctor Reports
Clear, honest answers to common questions about logging blood sugar, reading your trends, understanding estimated A1C, sharing reports and choosing your units — written to inform, not to diagnose.
Reading Your Blood Sugar Trends
How to read the 7-day to 1-year charts, what the time-in-range visual is telling you, and why the pattern matters more than any one reading.
Read guideUnderstanding Your Estimated A1C
How GlucoLog estimates A1C from your average glucose, when that estimate can mislead, and why it does not replace a lab A1C test.
Read guideSharing a Report with Your Doctor
Generate a compact or detailed PDF, or a CSV export, and walk into your appointment prepared with a clear record.
Read guidemg/dL and mmol/L: Choosing Units
Which unit your country uses, how to switch in GlucoLog, and the simple ×18 conversion between mg/dL and mmol/L.
Read guideFrequently Asked Questions
How do I track my blood sugar in GlucoLog?
Enter each reading from your meter or CGM with the large-button numpad, tag it by meal context — fasting, before meal, after meal or bedtime — and save it. Logging consistently builds a history and trends you can review and share. GlucoLog stores it privately on your device. Learn more
How do I read my blood sugar charts and time in range?
The dashboard shows a 7-day trend, and the Charts tab offers 7-day to 1-year views with your average, minimum and maximum. Time in range shows the share of readings within your target band versus low or high. The pattern matters more than any single reading. Learn more
What is the estimated A1C in GlucoLog?
It is an estimate of A1C calculated from the average of your logged glucose, using the standard eAG relationship (eAG = 28.7 × A1C − 46.7, inverted). It updates as you log more readings, but it is only an estimate and does not replace a laboratory A1C test. Learn more
Can I share a report with my doctor?
Yes. GlucoLog generates a compact or detailed PDF report and a CSV export. You choose the date range and whether to include readings, charts, estimated A1C and notes, then share it. It helps you arrive at appointments prepared with a clear record. Learn more
Does GlucoLog use mg/dL or mmol/L?
Both. You choose your preferred unit in Settings, and every reading, chart and report is shown in it. To convert between the two, multiply mmol/L by 18 for mg/dL, or divide mg/dL by 18 for mmol/L. Pick the unit your meter and doctor use. Learn more
Does GlucoLog measure my blood sugar?
No. GlucoLog is not a glucose meter or CGM and cannot measure blood sugar. You take your reading with your own device, then enter the number into GlucoLog, which records it, tags it by context, and turns your entries into trends, an estimated A1C and reports.
Does GlucoLog work with Apple Health?
Yes. GlucoLog can read and write blood glucose to Apple Health, so your readings stay alongside the rest of your health data in one place. You control the connection, and your data stays on your device and in your own iCloud.
Do I need an account, and is my data private?
You do not need an account to log your readings. Your data stays on your device and syncs through your own iCloud — it is never shared with third parties. You decide if and when to generate a report and share it with your doctor.
Track Your Blood Sugar, Clearly and Privately
Download GlucoLog free and log your blood sugar in seconds, tag it by meal, follow your trends and time in range, see an estimated A1C, and share a PDF or CSV report with your doctor. Your data stays on your device and in your own iCloud. GlucoLog does not measure glucose and provides general health information, not medical advice.