Glucose Log
Log blood glucose readings with context.
Overview
The Glucose Log records finger-stick or continuous-monitor readings in milligrams per decilitre alongside the context that gives them meaning. A 132 reading at bedtime is a very different signal from a 132 reading fasting, and the tool treats those nuances as first-class data rather than free-form notes you have to interpret later.
It suits anyone managing type 1 or type 2 diabetes, working through prediabetes, experimenting with low-carb or time-restricted eating, or wearing a CGM and wanting to spot-check standout values. Each entry takes about ten seconds to log and contributes to averages and trend numbers that make patterns obvious before they become problems.
How it works
Reading values accept any whole number from 0 to 800. The taken-at field is a date-time picker so backdated entries from a paper log or a glucometer download fit in correctly; values are stored in UTC so the chronology stays intact across travel. The context dropdown offers Fasting, Pre-meal, Post-meal, Bedtime, and Random, and the notes field handles anything beyond that vocabulary.
Once you have at least one reading the summary shows the running average, the percentage of readings that fell in the conventional 70 to 140 range, and, after fourteen readings, a trend that compares the most recent week's average against the prior week. Readings can be deleted individually so an obvious lab error or fingerprick contamination does not skew your history.
Examples
- Fasting baseline: log every morning reading before coffee or food to track whether overnight glucose is creeping up.
- Post-meal spike test: log a reading two hours after a high-carb meal and note the food to learn which meals push you out of range.
- Sick-day tracking: log every few hours during an illness so you and your clinician can spot stress hyperglycaemia.
- Exercise response: pair a pre-workout reading with one taken an hour after to learn how resistance training versus cardio affects you.
FAQ
Why mg/dL and not mmol/L? The tool stores readings in mg/dL only. To convert from mmol/L multiply by 18; from mg/dL to mmol/L divide by 18. Future unit support is tracked separately.
What is the in-range window? 70 to 140 mg/dL, which approximates the commonly used target band for post-prandial readings in non-diabetic adults. Your personal target may be tighter or looser; treat the percentage as a relative trend marker.
Can I log a CGM reading? Yes. Pick the timestamp that matches the CGM trace and enter the value. The tool is not a CGM replacement; it is a curation layer for the readings you find significant.
What does the trend number mean? It is the difference between the average of the seven most recent readings and the seven before that. Positive means rising glucose; negative means falling.