Desktop Fatigue Tracking (Privacy-First)

How to track fatigue on your desktop while preserving privacy, local control, and explicit sync choices.

Core 6 min read

Privacy-first checklist

Review data collection categories before long sessions

Keep cloud sync off until you decide you need it

Track coverage and confidence, not only fatigue labels

Use trend windows (7–30 days) before asking 'why'

Privacy controls

Keep the signal useful without oversharing

Privacy-first fatigue tracking should make every data choice visible, while still showing when reduced coverage affects confidence.

Default: Local; Start with device-side tracking.
Sync: Optional; Enable only when broader analysis is useful.
Report: Confidence; Show when privacy choices reduce signal quality.

Tradeoff map

Privacy settings should change confidence, not clarity

If a signal is disabled, the report should still explain what it can and cannot conclude.

Decision

Weak signal

Better signal

Local only

Weak · No analysis possible.

Better · Trend reads still work with coverage notes.

Reduced signals

Weak · Hide confidence limits.

Better · Show reliability and missing context.

Optional sync

Weak · Force cloud before value.

Better · Use sync for richer comparisons.

1. Start local-first and inspect your settings

A privacy-first setup is not just about turning features off. It starts by understanding what the app collects, what remains local, and what is optional. Review detector permissions and sync settings before building your baseline.

If you disable a signal category, that is fine. Just expect Sarenica to rely more heavily on the remaining signals and treat low-confidence windows as provisional.

2. Ask for coverage and reliability with every fatigue trend question

Privacy-conscious setups sometimes mean reduced signal breadth. That makes coverage and reliable minutes more important, not less. Always ask the AI to include coverage detail so you can see whether a pattern is supported.

Examples

"Summarize my fatigue trend over the last 30 days with coverage details."
"Compare this week vs last week and tell me if the reliable minutes are sufficient."

3. Prefer trend analysis before relationship analysis

When your data is intentionally minimal, trend summaries are usually more robust than relationship claims. First confirm that a fatigue trend exists, then ask for a relationship analysis only if coverage supports it.