Connection, evidence, recovery
Tessa’s private machinery.
Review the data path, alert behavior, permissions, storage, and recoverability in one place.
Tesla connection
Simulator only
No Tesla credentials are configured. The production OAuth flow is implemented and requests only read and location scopes.
Read-only data path
From car to private history
- 01Tesla Fleet TelemetryChange-based signals · no polling
- 02Railway coreMQTT QoS 1 · append-only PostgreSQL
- 03Tessa intelligenceSessions, estimates, evidence, alerts
Quietly observant
Alert rules
Preset evidence thresholds. Tessa informs; it never acts on the car.
Phone and recovery
Delivery and data ownership
iPhone Web Push
Install Tessa to your Home Screen first. Push is enabled only after your explicit permission.
Encrypted full export
Includes raw and derived simulator history, settings, a versioned manifest, and checksums. The download expires after 15 minutes.
Locale defaults
Japan, in English
- Interface
- English · Japan locale
- Time zone
- Asia/Tokyo
- Measurements
- km · Wh/km · kWh · kW · °C
- Quiet hours
- 22:00–07:00
- Insight digest
- 08:00 when useful
Cost guardrails
Small safety buffer
- Tesla limit
- $15 / month
- Usage warnings
- 50% and 80%
- Railway hard limit
- $10 / month
- Railway warnings
- $5 and $8
- Vercel
- Hobby · personal only