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Your First Reading

Once Strimma is set up, here's what happens when it receives a glucose reading from your data source.

What You'll See

The Notification

A persistent notification appears in your notification bar showing:

  • BG value — your current glucose, large and readable
  • Direction arrow — which way your glucose is trending (e.g., ↗ rising slowly)
  • Delta — how much your glucose changed since the last reading (e.g., +0.3)
  • Graph — a 1-hour glucose history, right in the notification

Pull down the notification to see the expanded view with a larger graph.

The Main Screen

Open Strimma to see the full display:

  • Hero BG — your glucose in large, bold text, color-coded:
    • Cyan — in range
    • Amber — above your high threshold
    • Red — below your low threshold
    • Gray — stale (no recent reading)
  • Direction arrow — next to the BG value
  • Delta and time — how much it changed and how long ago (e.g., "+0.3 · 2 min ago")
  • Interactive graph — 4 hours of history by default (pinch to zoom, drag to pan, tap a dot to inspect)
  • Minimap — 24-hour overview below the graph, tap to jump to any time

If Nothing Appears

If Strimma doesn't show a reading:

  1. Check the data source — in Strimma Settings > Data Source, make sure the correct mode is selected
  2. For Companion mode: check that notification access is granted (Android Settings > Apps > Special app access > Notification access > Strimma) and that your CGM app is posting notifications
  3. For other modes: check that the source is configured correctly (see Troubleshooting)
  4. Check the debug log — in Strimma Settings > Debug Log, look for messages about received or rejected data

Force a reading

In Companion mode, open your CGM app and wait for its next reading cycle. Most CGMs report every 1 minute (Libre 3) or every 5 minutes (Dexcom). Strimma processes the notification within seconds.

Understanding the Colors

Strimma uses consistent colors everywhere — the BG display, the graph, the notification, and the widget:

Color Meaning Default threshold
Cyan In range 4.0–10.0 mmol/L (72–180 mg/dL)
Amber Above high > 10.0 mmol/L (180 mg/dL)
Red Below low < 4.0 mmol/L (72 mg/dL)
Gray Stale data No reading for 10+ minutes

You can change the low and high thresholds in Settings > Display.

Next Steps