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A blood sugar log with meal context

FitRest's blood glucose log lets you record readings from your meter in mg/dL or mmol/L, tag each one as Fasting, Before Meal or After Meal, and add a note. Trends then show how many readings sat in range, how steady they were and which way they are heading.

Download on the App Store
Units
mg/dL or mmol/L
Meal context
Unspecified, Fasting, Before Meal, After Meal
Trends
7, 30, 90 days or custom
Log from
iPhone or Apple Watch

What the glucose log shows

Each entry is a value from your meter, a meal context, an optional note and a time from the When? picker, so you can log a reading from earlier in the day. The entry screen shows a target range line, so it is clear at a glance where a reading falls. You choose mg/dL or mmol/L on the glucose screen itself.

Glucose Trends summarises a period of 7, 30 or 90 days or a custom range, and the insight explainers put the numbers into words.

  • Total Readings and In Range, shown as a count out of the total.
  • Counts per meal context, and how many readings were Below Range or Above Range.
  • Perfect Days - days when all readings were in range.
  • Time in Range, labelled from Excellent to Poor.
  • Glucose Variability, labelled Stable, Moderate or Variable.
  • Glucose Trend, from Rising Rapidly to Falling Rapidly.

Why context matters for glucose readings

Blood glucose naturally rises after eating and falls back over the following hours, so a single number means little without knowing when it was taken. A reading that is high for a fasting check can be perfectly ordinary an hour after a meal. Tagging each reading with its meal context is what makes a log readable later, whether you are looking at it yourself or sharing it.

Patterns over weeks also say more than any one day. How often readings stay in range, and how much they swing, are the kinds of summaries people commonly review with a doctor. FitRest's built-in Understanding Blood Glucose guide explains general reference ranges for each context, from Low to Very High.

FitRest is not a medical device. It does not diagnose, treat or manage any condition, and it should never replace advice from your doctor or your care plan. Talk to a doctor about any reading that worries you.

Logging on iPhone and Apple Watch

On iPhone, open Glucose from the + button on the Dashboard. The Blood Sugar card on the Dashboard shows your latest reading and how long ago it was taken. It is hidden by default and can be turned on in Customize. There are also Reading and Weekly glucose widgets for the Home Screen.

On Apple Watch, the Glucose page takes a value and a Meal Type, in the same unit you use on your iPhone. Turn on Save to Apple Health and every reading is written there. Readings that another app or device saves to Apple Health also appear in FitRest.

Reminders and export

Glucose Reminders in Settings > Notifications send a Blood Glucose Check at the times you choose, which helps if you check at set points in the day. The export button on the glucose screen saves the last 30 days as a Text File, a CSV File or a PDF Document, ready to share at your next appointment.

How to use it

  1. 1Tag every reading with its meal context. Fasting and After Meal readings tell very different stories.
  2. 2Set Glucose Reminders for the times you usually check, so the log has no gaps.
  3. 3Add a note when something unusual happened, such as a large meal, a hard workout or a short night.
  4. 4Look at Time in Range and Glucose Variability over 30 days rather than reacting to one reading.
  5. 5Export the last 30 days as a PDF before an appointment.

Blood Glucose: questions and answers

Can FitRest show glucose in mmol/L?

Yes. You can choose mg/dL or mmol/L on the glucose screen, and the Apple Watch Glucose page uses the same unit.

Does FitRest read glucose from Apple Health?

Yes. Readings other apps or devices save to Apple Health show up in FitRest, and readings you log in FitRest can be saved to Apple Health.

What does the Fasting tag do?

It marks the reading as a fasting check, so trends can count readings per meal context. Unspecified, Before Meal and After Meal are the other options.

Can I export my glucose readings?

Yes. The export button on the glucose screen saves the last 30 days as a Text File, CSV File or PDF Document.

Is FitRest a medical glucose app?

No. FitRest is a wellness app for keeping a log of your readings, not a medical device. Follow your doctor's advice for anything to do with managing your glucose.

Guides on this topic

See your own patterns

FitRest reads the data already in Apple Health, so there is nothing to set up beyond granting access.

Download on the App Store

iPhone, iPad and Apple Watch. Requires iOS 17 or later.