Memory and averages (mem, avg, logbook)
You are looking at stored results or at an average of them, not at a new test. The screen shows the date and time of the stored result, or how many days the average covers.
Check your meter’s manual — makers differ.
What it is for
Before you rely on an average, check which results it leaves out. On the meters read here, control solution results that were marked as control are left out, and so are HI and LO results on the FreeStyle Freedom Lite (Abbott) and the Accu-Chek Guide (Roche).
These pages report what each maker’s manual says and quote it wherever health is involved. They do not diagnose anything, they are not medical advice, and they never tell you how to treat a result; only your own meter’s manual and your healthcare team can do that for your model.
- What it looks like
- The letters mem, or davg with a number of days, on the FreeStyle Freedom Lite; a book icon (Logbook) on the Contour; a clock arrow for History on the OneTouch Verio Flex; a My data menu on the Accu-Chek Guide.
- Names makers use
- mem, Day Average Symbol (davg) (FreeStyle); My data, Averages (Accu-Chek); Logbook (Contour); History Mode, Averages (OneTouch)
Where makes differ
Memory sizes differ: 400 results on the FreeStyle Freedom Lite (Abbott), 720 on the Accu-Chek Guide (Roche), 800 in the Contour Next One logbook (Ascensia). The averages differ: FreeStyle offers 7, 14 and 30 days, Accu-Chek 7, 14, 30 and 90 days, overall and per meal comment. What is left out differs: Abbott leaves out control, LO and HI results but keeps results taken outside the temperature range; Roche says results that are invalid or “outside the system measuring range” are excluded; Ascensia leaves control results out of the logbook altogether.
What it does not mean
An average is not a new measurement, and it does not know which results were control tests unless the meter marked them: the OneTouch Verio Reflect booklet (LifeScan) says an unmarked control test “will be included in your averages”.
Other symbols with the same shapes
Sources
No published standard we could check defines blood glucose meter control icons, so this meaning is taken from 4 makers’ own manuals and support pages, each fetched and read on the date shown:
- Abbott: FreeStyle Freedom Lite blood glucose monitoring system — owner’s booklet (Australia, ART22410-102 Rev. B, PDF) — Meter display: Memory Mode Symbol, Day Average Symbol “the average value of glucose readings from the last 7-, 14- or 30-days”; “The meter stores the last 400 test readings”; “Control solution, LO and HI readings are not included in the average.” Checked 2026-09-28.
- Roche: Accu-Chek Guide blood glucose meter — user manual (US, PDF) — Review Your Data: “stores up to 720 blood glucose results”; “All test results are included in the overall 7, 14, 30, and 90-day averages”; “Control results are not included in the averages”; results “outside the system measuring range” excluded from averages. Checked 2026-09-28.
- Ascensia: CONTOUR NEXT ONE blood glucose monitoring system — user guide (US, PDF) — Logbook: “When the Logbook reaches the maximum 800 results, the oldest test result is removed”; control test results are not included in the Logbook or averages. Checked 2026-09-28.
- LifeScan: OneTouch Verio Flex — owner’s booklet (US, PDF) — Meter symbols: History Mode (Past results). Checked 2026-09-28.
Written in our own words; quotations are the makers’ wording.