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Stay in range, one reading at a time

Keep all your blood sugar readings in one safe place, see your time in range at a glance, and understand what your numbers mean - with clear guidance from the NHS, NICE and Diabetes UK.

Start tracking What does my reading mean?
  • Based on UK guidance
  • In mmol/L

Quick guide

What does your reading mean?

Blood sugar is measured in mmol/L. What counts as in range depends on when you tested and your type of diabetes - but these two lines matter for almost everyone.

Low

Below 4.0

A hypo. Treat it now with fast-acting sugar.

In range

4 to 7 before meals

In the target range. Keep it up!

Above target

Above your target

Look for a pattern over a few days.

Very high

15.0 or higher

Very high - check for ketones if unwell.

Your exact targets depend on your type of diabetes and are agreed with your team. Read the full guide

5 million+

people in the UK are living with diabetes - more than ever before.

Few symptoms

Type 2 diabetes can develop with little or no warning, so keeping an eye on your numbers matters.

Source: Diabetes UK and the NHS.

How it works

Three simple steps

  1. Take your reading

    Use your finger-prick meter or sensor as usual, in mmol/L.

  2. Log it here

    Pop in the number and when you took it - before a meal, after, fasting. A few seconds.

  3. See how you're doing

    We show your trend, your average and how much time you spend in range.

Your readings

Every reading in one place, with a clear chart, your target band and colour-coded results.

Open my readings

Check a reading

Not sure if a number is in range? Pop it in and see what it means for your type of diabetes.

Check a reading

Easy guides

Friendly, plain-English guides to blood sugar, hypos, HbA1c and more.

Start reading

Learn

Everything you need to know

Understanding your numbersWhat a blood sugar reading in mmol/L means, and the UK target ranges by time of day.Type 1, type 2 and moreThe main kinds of diabetes, how they differ, and why the targets aren't the same.Hypos (low blood sugar)Why 4 is the floor, how to spot a hypo, and how to treat one step by step.Highs and ketonesHigh blood sugar, when to check for ketones, and the warning signs of DKA.Testing at homeHow to use a finger-prick meter, when to test, and getting an accurate result.HbA1c explainedThe three-month average, how it relates to your daily readings, and the UK targets.Food, activity and weightThe everyday changes that help keep blood sugar in range, with the official advice.Diabetes in pregnancyGestational diabetes, the tighter targets in pregnancy, and what they mean.

Want more? Try Plus

Free Diabetes Tracker stays free. For £2.99 a month, Plus adds your full history beyond 90 days, monthly reports and a PDF report to send to your GP or diabetes team.

See Plus

Severe hypo, or a very high reading with ketones?

Know the signs that need fast-acting sugar, a call to your team, or 999.

When to get help