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Mori
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Mori

Private period tracker — no account, works offline

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Mori is a free, private period tracker for Android. Log your period in one tap on a calendar, and see the next one as a date range with its basis and confidence level.


No account, no ads, works fully offline — without sync turned on, records never leave your phone. Optional cloud sync is a one-time US$3.99, encrypted on-device before upload.


Available as a signed APK download (not on Google Play yet). English and Chinese.

Example Image
Example Image

Features

One-tap period logging on an interactive calendar

Next-period prediction shown as a date range with basis and confidence

Ovulation day and fertile window estimates, clearly labeled as estimates

Local reminders with discreet notification text

Full export (JSON/CSV/readable summary) and one-tap delete-all

No account, no ads, no subscription

Use Cases

Track your period and see the next cycle window without creating an account

Understand how regular your cycles are over time

Keep health records on-device instead of in someone else's cloud

Export or permanently delete everything when you want

Comments

Showing the next period as a date range with a stated basis and confidence level is a thoughtful choice over a single date. How many logged cycles does it need before the confidence level becomes meaningful for irregular cycles?

Hi Fazier 👋 I built Mori after the 2024 reporting on period apps selling cycle data. Most trackers lock logging behind an account and sync by default — Mori flips that: no account, no ads, works offline, and records stay on the phone unless you opt into encrypted sync. It's a one-time purchase, not a subscription. Would love feedback on whether the privacy tradeoffs land for people here.

Showing the next period as a range with its confidence is more honest than one confident date. Is an iOS version planned?

Bagofa – Free Online Image, PDF & File Tools https://bagofa.com/

A great example of privacy-first app development! 👏 Offline functionality, no ads, and user-controlled encrypted backups make Mori a thoughtful alternative to traditional period trackers. Putting users' privacy and data ownership first is always a strong approach. 🔒

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Comments

Showing the next period as a date range with a stated basis and confidence level is a thoughtful choice over a single date. How many logged cycles does it need before the confidence level becomes meaningful for irregular cycles?

Hi Fazier 👋 I built Mori after the 2024 reporting on period apps selling cycle data. Most trackers lock logging behind an account and sync by default — Mori flips that: no account, no ads, works offline, and records stay on the phone unless you opt into encrypted sync. It's a one-time purchase, not a subscription. Would love feedback on whether the privacy tradeoffs land for people here.

Showing the next period as a range with its confidence is more honest than one confident date. Is an iOS version planned?

Bagofa – Free Online Image, PDF & File Tools https://bagofa.com/

A great example of privacy-first app development! 👏 Offline functionality, no ads, and user-controlled encrypted backups make Mori a thoughtful alternative to traditional period trackers. Putting users' privacy and data ownership first is always a strong approach. 🔒

Premium Products