Alerts¶

Strimma can alert you with sound and vibration when your glucose crosses configurable thresholds.

Alert Types¶

Strimma has eight alert types, each with its own Android notification channel so you can customize the sound and vibration for each one independently. Regular and Exercise protocols share the corresponding channels.

Glucose Threshold Alerts¶

Predictive Alerts¶

System Alerts¶

Workout-Mode Behavior¶

When workout mode is on (see Workout Mode):

• The Exercise protocol is selected instead of the Regular protocol. Its independent enablement toggles, thresholds, predictive toggles, and stale toggle apply (defaults: 5.0 / 6.0 / 14.0 / 16.0 mmol/L).
• Exercise Low and Exercise High also become the in-range bounds for graphs and other live displays while Workout Mode is on.
• Alert titles are prefixed with Workout · (e.g., Workout · Urgent Low) so the severity label is unambiguous — without this, an "Urgent Low" at 5.0 mmol/L could be misread as a normal-life crisis.
• Stale-data alerts use the selected protocol's toggle. They are suppressed for the first 30 minutes of Workout Mode, then use the normal 10+ minute rule.

Priority Logic¶

Alerts follow a priority system to avoid duplicate noise:

• Urgent Low takes priority over Low. If your glucose triggers both, only Urgent Low fires. When it rises above the urgent threshold, Urgent Low clears and Low can fire if still below the low threshold.
• Urgent High takes priority over High. Same logic — only the more severe alert fires.
• Predictive alerts only fire when in range. If you're already low, "Low Soon" won't fire — you already know.

Snooze¶

When an alert fires, the notification includes a Snooze button (label shows the configured duration, e.g. Snooze 30m). Tapping it silences that alert and any less severe alerts in the same category for the Alert Snooze Duration set in Settings > Alerts.

This setting is independent of Settings > Notifications → Action Button → Duration (that control pauses ALL / High / Low from the foreground notification).

• Snoozing a lower-severity alert does not suppress higher-severity alerts — snoozing Low Soon doesn't affect Low or Urgent Low, and snoozing Low doesn't affect Urgent Low
• After the configured duration, alerts can fire again if the condition persists
• Snooze state is stored locally and survives app restarts

Pause by Category¶

You can pause entire alert categories for a custom duration — useful during exercise or known post-meal spikes.

• Set a custom duration when pausing
• The pause auto-clears when the duration expires
• Pause state survives app restarts
• The All alerts shortcut at the top of the pause sheet sets both Low and High to the same duration in one tap. The header shows a single All alerts paused pill while the two expiries match; cancelling or rescheduling one category from the sheet splits it back into per-category pills

Configuring Alerts¶

Go to Settings > Alerts. The screen has three sections, with independent Regular and Exercise protocols and one shared behavior section.

Alerts¶

This section configures the Regular protocol used outside Workout Mode:

• Each configurable alert has an independent toggle. Disabled alerts never fire, regardless of your glucose level.
• The four glucose threshold alerts (Urgent Low, Low, High, Urgent High) each have an editable threshold in your configured unit (mmol/L or mg/dL).
• Low Soon, High Soon, and Stale Data use the Regular protocol's enablement settings.

Exercise Alerts¶

This section configures the independent Exercise protocol used while Workout Mode is active. It has its own enablement toggles and threshold values; changing it does not change the Regular protocol. Exercise Low and Exercise High also define the exercise graph range.

Exercise alerts use the same notification channel as their corresponding Regular alert. Exercise rows intentionally have no Sound buttons or separate channel links.

Alert Behavior¶

Alert Snooze Duration and Cooldown appear once in this shared section and apply to whichever protocol is active. They are not separate Regular and Exercise settings.

Customize Sound¶

Regular alert rows have a Sound button that opens the Android notification channel settings for that alert. Exercise alert rows intentionally omit Sound buttons because both protocols use the same Android notification channels. From a Regular alert's Sound button you can:

• Choose a different notification sound or alarm tone
• Enable/disable vibration
• Change the vibration pattern
• Override Do Not Disturb settings (for urgent alerts)

Do Not Disturb Bypass¶

Urgent Low and Urgent High alerts bypass Do Not Disturb mode by default. This is critical for safety — a severe low at 3 AM needs to wake you up.

The other alerts (Low, High, Low Soon, High Soon, Stale Data) respect Do Not Disturb by default. However, you can change any alert to bypass DND:

1. Go to Settings > Alerts
2. In the Alerts section, tap the Sound button next to the alert you want to change
3. In the Android notification channel settings, enable Override Do Not Disturb

This is an Android feature — once you change a channel's DND setting, Android remembers it.

How Alerts Are Triggered¶

1. Strimma receives a new glucose reading
2. The reading is checked against each enabled alert's threshold
3. If a threshold is crossed and the alert isn't snoozed, the alert fires
4. Stale data is checked every 60 seconds independently

Re-alerting¶

Alerts keep firing as long as the condition persists. Each new glucose reading triggers a check — if you're still low and the alert isn't snoozed, it fires again. This means you'll get alerted on every reading until you either:

• Snooze the alert (silences it for the configured Alert Snooze Duration), or
• Return to range (the condition clears)

If you snooze an alert and you're still out of range when the snooze expires, the alert fires again on the next reading.

This is intentional — a persistent low or high should not be silently ignored.

Cooldown¶

By default (Cooldown set to Off), alerts fire on every reading while the condition persists. To reduce notification fatigue during prolonged episodes, you can set a Cooldown in the Alerts settings:

Per-alarm cooldown¶

Each alarm type (Urgent Low, Low, High, Urgent High) has its own independent cooldown timer. If you set a 15-minute cooldown:

• Low fires at 10:00 → next Low suppressed until 10:15
• Urgent Low at 10:05 → fires immediately (separate alarm, separate timer)
• Low at 10:16 → fires (cooldown expired)

Cooldown reset¶

When glucose returns to range, all cooldown timers reset immediately. The next episode alerts right away regardless of remaining cooldown.