Blood glucose tracker with estimated A1C on iPhone
A practical look at connecting daily glucose readings with estimated A1C, trend review, and clean tracking on iPhone.
If you are looking for a blood glucose tracker with estimated A1C (eA1C) on iPhone, Glu Sight connects your daily readings to a longer-term view without extra calculation.
Whether your readings come from manual entry or compatible CGM data synced through Apple Health, including devices like Dexcom G7 or Stelo, the app shows your eA1C based on the glucose history you have recorded.
eA1C based on your logged glucose history
The estimate updates as you add more data, so it reflects the glucose history you have actually logged in the app.
Your eA1C can be displayed as a percentage or in mmol/mol, so you can read it the same way you are familiar with lab HbA1c. This is not a lab result and does not replace HbA1c testing ordered by a clinician. It is a practical reference based on the readings you have chosen to track, designed to support your own review, not to diagnose, treat, or guide treatment changes.
How daily glucose connects to eA1C
Each glucose reading you log becomes part of a longer record. Over days and weeks, those individual numbers form a pattern that eA1C can summarize.
The value is in having both views available. A single reading gives you immediate context. The eA1C gives you a broader perspective, so you can see the arc of your numbers without needing to average them yourself.
Log the way that works for you
Glu Sight treats manual glucose logging and Apple Health data as equally valid options.
You can enter readings directly, sync compatible CGM data from Apple Health including devices like Dexcom G7 or Stelo, or use a mix depending on your routine.
Review trends alongside the estimate
eA1C is one piece of the picture. Glu Sight also organizes your history into charts, time in range, variability, and recurring patterns so you can review the data behind the number.
The app does not provide medical advice, diagnosis, treatment, or dosing recommendations. The goal is clearer tracking and review, not replacing your clinician or care team.
Export your history for appointments
When you want to bring organized glucose data into a conversation with your care team, Glu Sight Plus includes PDF and CSV exports. Those reports include your glucose history, eA1C trends, and a structured record you can share or keep for your own files.
Clean tracking for daily and long-term review
An eA1C is most useful when the tracking behind it is consistent and low-friction. Glu Sight is built to keep that routine simple. It is a focused iPhone app for glucose tracking, insulin and medication history, Apple Health data, trends, insights, and reports.