Privacy policy
Last updated 12 Nov 2026. Draft: review with a privacy professional before launch.
Summary
Sigtrail is a connection-quality and phone-heat monitor. It runs on your device and does not collect, sell or share personal data. There are no accounts, no ads, no analytics and no third-party SDKs.
Who publishes the app
Desmond Kwok, trading as 3 Bears Kopi, Singapore. Contact: info@3bearskopi.com.
What the app measures
Link type (Wi-Fi or mobile), latency, jitter, packet loss, download speed when you tap Test now, mobile radio type, and the phone's thermal state (Cool, Warm, Hot, Critical) as reported by iOS. If you turn it on, each reading is tagged with a coarse location rounded to about 220 metres.
To measure a connection, the app sends small network probes to public Cloudflare endpoints, including Cloudflare's public address 1.1.1.1 for mobile data latency tests. This measurement traffic contains no personal information from the app.
Where your data lives
- Readings are stored on your device. The app keeps the latest 20,000 raw readings (roughly 9 to 12 days).
- It also keeps half-hour summaries (counts and averages, no location) for up to 120 days, to show longer patterns.
- Location tags never leave your device. Sigtrail does not send history, readings, location or heat data to any server.
- Deleting the app deletes all of this data.
- If you buy Sigtrail Pro, the purchase is handled by Apple through the App Store. Sigtrail does not receive your payment details or Apple ID, and does not add any tracking.
What we do not collect
Names, email addresses, device identifiers, precise location, contacts or any other personal information. No analytics, advertising or crash-reporting services.
Your choices
- Turn location tagging off at any time.
- Delete history inside the app, or delete the app.
- Stop the monitor and widgets to stop all measurement.
- Export your own data as a CSV file from the app.
Changes
Material changes will be shown by a new "last updated" date.