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CLUSTER DATA-PERIOD-PRIVACY · 6 ENTRIES · EARLIEST ENTRY 2023-12-25

Privacy-first local tracking apps

This cluster consists of privacy-focused tracking applications, predominantly period trackers with on-device data storage and one macOS time tracker offering focus insights. The dated history before the index start is too thin (only 4 entries) to discern a timeline shape, indicating the cluster predates the index or most members are undated. Traction is minimal, with ticker-app leading at 2 stars while other identified members have none.

Entry timeline

ENTRY TIMELINE

DEC 2023: 1OCT 2025: 1FEB 2026: 1JUL 2026: 1AUG 2026: 2
DEC 2023AUG 2026

Each bar is the month a member carries, which is a creation date where the source published one and a crawl date otherwise. Nothing in the index was found before 11 August 2026, and coverage broadened sharply on 14–15 August, so a bar from then on reports how much we found that month, not how much was built; an earlier bar reports how far back a member's own source dated it — not how long we have been watching.

Members by activity

Activity signals, not revenue.

Build origin · 1 hand-coded · 5 unlabelled

Operator · 2 hobby · 2 open source · 2 unlabelled

Two labels per entry, never collapsed into one: how it was built, and who stands behind it. Counted over the 6 listed below. Unlabelled means nothing has decided yet — not that the answer is small.

  1. 01ticker-app2★2 molivehobbyA macOS time tracker that provides focus insights and healthy-break reminders with a privacy-focused local-first design.
  2. 02ritulaya0★28 days—hobbyPrivacy-focused period tracker for Android that stores data locally with optional encrypted sync.
  3. 03Period Pal: Cycle Tracker0★2 molivePeriod tracker that shares cycle updates with a trusted partner via one-time invite links, with revocable read-only access and private notifications.
  4. 04Posy: Period Tracker & Log0★7 mostalelivePrivacy-focused period tracker with local data storage and premium subscription.
  5. 05Bluemoon0★10 mostalelivehand-codedopen sourceA privacy-focused period tracking app that stores data on-device.
  6. 06Menstrudel Period Tracker0★6 mostaleliveopen sourceOffline open-source period tracker that stores all cycle data locally on device with biometric security and no cloud.

Ranked by traction, highest first, and paged 20 at a time — this is a window on the cluster, never the whole of it. Ties are broken by a stable id so a product cannot appear on two pages or fall between them. Browse every cluster.