Period Tracker Offline: Mira

A period and cycle tracker with no servers to send your data to.

No account. No ads. No subscription. No internet connection - at any point, for any feature. Turn on airplane mode and Mira works exactly the same. That is the whole idea.

WHAT IS NOT IN THIS APP
No advertising code. No analytics. No crash reporting. No third-party libraries that phone home. No sign-up screen, no email, no password. Nothing about your cycle is synced, shared or sold, because nothing about your cycle can leave the device in the first place.

WHERE YOUR DATA ACTUALLY LIVES
- In an encrypted database on your iPhone, with the key held in your device's secure storage.
- Not on a server, not in a cloud account, not in a marketing profile.
- The app cannot leak your data, because it has no way to transmit it.
- The only files that ever leave are the ones you tap Export on.
- Optional Face ID, Touch ID or passcode lock on the app itself.

PREDICTIONS THAT ADMIT WHAT THEY DON'T KNOW
A single confident date hides how much cycles actually vary. Mira shows a range with a confidence band, widens it when your cycles vary, and says plainly when it does not have enough history yet. Tap "How Mira estimates this" to read the method and the clinical sources it follows - ACOG and WHO are cited inside the app, not just claimed in a listing.

THE RING
One screen for today: cycle day, current phase, next expected period, and a single honest insight. The fertile-window estimate tightens as Mira learns your real pattern.

LOGGING THAT TAKES SECONDS
- Your flow marks the period. No start and stop buttons to remember.
- Long-press any day on the calendar to log it fast.
- Flow, symptoms, mood, notes, and your own custom tags.
- Basal body temperature in °C or °F, plus cervical fluid.
- Flag spotting or non-period bleeding so it never skews your averages.

IF YOU ARE TRYING TO CONCEIVE
Switch on the conception goal and the ring, calendar and reminders refocus on your fertile days. Chart BBT over time and log cervical fluid beside it, kept entirely offline.

IF YOUR CYCLES ARE IRREGULAR
A regularity score, your cycle history at a glance (shortest, average, longest), trend charts for cycle length and period duration, and predictions that widen honestly instead of pretending to be certain.

CALENDAR AND PHASES
A phase-colored calendar with the moon phase on every day, so a whole month reads at a glance.