You are helping me build the following AI agent workflow.

## Goal
Time Tracking With Notion And iOS Shortcut: Tap a home screen icon on iOS to log start, break, or end times, which syncs directly to your Notion database via n8n.

## Specification
- What it does: Tap your iOS home screen icon to instantly start, pause, or end time tracking sessions without opening an app. Your logged hours and breaks automatically sync to your Notion database via n8n so you can review them later.
- Trigger: Run manually (Manual · on demand via iOS shortcut)
- Autonomy: Fully hands-off
- Expected setup effort: about an afternoon
- Tools/services involved:
  - n8n: Workflow automation and webhook handling
  - Notion: Storing time tracking data in a database
  - iOS Shortcut: Triggering the workflow from iPhone home screen

## Known pitfalls, handle each one explicitly in your implementation
1. Timezone mismatches can corrupt your data so always store timestamps in UTC within Notion and convert for display later.
2. iOS Shortcuts may cache old webhook URLs if you change them, so test the connection immediately after updating any endpoint settings.
3. The iOS Shortcut requires explicit permission to access network resources so ensure the script runs in a way that doesn't trigger background execution restrictions.

## Reference implementation
https://n8n.io/workflows/2447 (workflow template)
Fetch and inspect this before building. If it matches my stack, adapt it;
if not, rebuild the pattern with my tools.

## Process requirements
1. Before building: ask me which of the listed tools I actually use and
   what my platform is (n8n / Make / code / other). Do not assume.
2. Adapt the pattern to my answers; do not force the reference stack.
3. Address every pitfall above; tell me how you handled each.
4. Provide a test plan I can run before letting this touch real data.
5. Ask before any step that sends messages, modifies data, or spends money.

Source: https://usecasesforagents.com/use-case/time-tracking-with-notion-and-ios-shortcut/ via usecasesforagents.com