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Limits and ranges

This page collects the numbers. Each is stated once here and explained on the page it belongs to.

LimitValue
Recordable glucose reading20–999 mg/dL, whole numbers; 1.1–55.5 mmol/L, one decimal. Outside → rejected with a message, never clamped
”Outside the range a cat’s meter usually reads” warningBelow 40 mg/dL (2.2 mmol/L) or above 500 mg/dL (27.8 mmol/L) — still saveable
Same-reading duplicate warningIdentical value within 10 minutes of the last reading
Insulin dose wheel0.5–99.0 units in 0.5-unit steps; prefill = last dose rounded down to the grid, else 1.0
Second-dose warningAny dose within 60 minutes of the last
High-dose warningMore than 15 units
Note length500 characters (glucose and insulin)
Entry timeAny time up to now; no future times
Undo after a delete5 seconds, most recent delete only
Save confirmation toast2 seconds
LimitValue
Target rangeMinimum ≥ 20 mg/dL (1.1 mmol/L), maximum ≤ 999 mg/dL (55.5 mmol/L), maximum > minimum
Default target range80–180 mg/dL (4.4–10.0 mmol/L)
Number of catsNo upper limit; at least one — the last profile cannot be deleted; the switcher bar appears from two
PhotoCropped to a 300 pt square JPEG
Unit conversion1 mmol/L = 18 mg/dL
TypeOnsetPeakDuration
Lantus (Glargine), Levemir (Detemir)1.5 h5.0 h24 h
ProZinc (PZI)0.75 h6.0 h16 h
Vetsulin/Caninsulin0.5 h3.5 h10 h
NPH1.0 h4.0 h7 h
Custom1.0 h4.0 h12 h

Activity curve windows: 12 h / 24 h / 48 h, sampled every 15 minutes; doses up to 24 h before the window still contribute.

LimitValue
Chart ranges24 h, 7, 30, 90 days, or a custom whole-day range; default 7 days
Full-screen window6 hours minimum, all data maximum; menu presets 6 h / 1 d / 3 d / 1 week / all
Insulin chart axisScales to the largest dose ×1.1, never below 5 units
Report presetsLast 7 Days, Last 30 Days, Last 3 Months, Last Year, Custom Range — whole days, one cat per report
Report page sizeUS Letter
LimitValue
Reminders4 daily (morning/evening × glucose/insulin), one schedule for all cats; default 8:00, 8:05, 20:00, 20:05
Foreground suppressionInsulin reminder hidden if the active cat has a dose in the last hour
Post-dose suppressionAn insulin reminder due in the next 60 minutes is pushed to tomorrow
LimitValue
Glucose on import> 0 and ≤ 2000 mg/dL after unit conversion; unit-less values must be ≥ 19
Insulin on import> 0 and ≤ 200 units
Duplicate matchSame cat, same minute, same value to 3 decimals, same insulin type
Export precisionGlucose 1 decimal (mg/dL), insulin 2 decimals
Skipped-row listReasons for every skipped row; the first 20 row numbers are kept, the first one shown
EncodingsUTF-8 (with or without BOM), UTF-16, Windows-1252
  • Connect to a glucose meter, continuous glucose monitor or any device.
  • Sync between devices, back up to a cloud, or restore anything but a CSV.
  • Compute glucose variability, coefficient of variation, “time in range” as a duration, trend lines, consistency scores or any derived metric — only counts, an average and the share of readings inside the target range.
  • Suggest, adjust or grade an insulin dose, or predict a reading.
  • Edit an entry in place (delete and re-log instead).
  • Keep separate reminder schedules or insulin types per cat.
  • Run on the web, Android or Mac.