CycleSync is a cycle-aware calendar companion for professional women. Track your cycle, see scheduling conflicts before they happen, and reschedule demanding meetings to days when your focus peaks.
CycleSync maps your cycle onto four seasons — Winter, Spring, Summer, Autumn — each with its own energy and focus profile.
Rest and recovery. Reschedule high-stakes meetings. Protect cognitive load and physical comfort.
Rising energy and creativity. Ideal for planning, ideation, and starting new initiatives.
Peak performance. Take on negotiations, leadership, and high-stakes conversations.
Focused wind-down. Finish projects, organize, review. Honour your need for depth over breadth.
CycleSync connects to Apple Calendar, Google Calendar, and your device calendar — no second app to maintain, no events to duplicate.
Connect Apple Calendar (iOS) or Google Calendar to see your schedule overlaid with cycle phases. Read-only — your events stay where they are.
CycleSync automatically flags events scheduled on heavy-flow days, rest days, or high-density focus days — before they cost you energy.
A rule-based recommendation engine finds better days for conflict events. One tap moves the meeting. A 10-second undo gives you room to change your mind.
Visualize your monthly energy curve, see seasonal capacity breakdowns for verbal, social, physical, and focus output — and spot your patterns.
Phase transition reminders, daily morning insights, period predictions, and gentle re-engagement alerts when you haven't opened the app in a while.
Read menstrual cycle data automatically from Apple Health (iOS) or Google Health Connect (Android). You control exactly what's shared.
When CycleSync detects a conflict, it pre-calculates your available slots on better-phase days. Pick a time, reschedule in seconds. The undo toast keeps every action reversible for ten seconds.
A month view that puts your cycle front and center — color-coded phase cells, day-by-day heavy-flow indicators, and your real meetings visible underneath.
A predicted energy curve shows where your focus and stamina will rise and fall. Plan demanding work for peaks. Schedule rest before you crash.
CycleSync is local-first. No cloud sync. No accounts. No tracking. Cycle data, calendar events, and preferences live on your device — and only your device.
The full cycle tracker, dashboard, calendar sync, and basic conflict detection are free forever. Pro adds unlimited reschedules, advanced insights, and priority nudges.
Everything you need to get started.
Unlimited reschedules and priority nudges.
Also available: $9.99/month or $4.99/week · Manage or cancel anytime in your store account settings.
Yes. CycleSync is local-first. All cycle logs, preferences, and insights are stored on your device using encrypted local storage. We don't operate servers that hold your data, we don't sync to the cloud, and we don't have accounts. Health data from Apple Health or Google Health Connect is read-only and never leaves your phone. You can export everything as JSON or CSV at any time.
Yes. The cycle tracker, phase visualization, dashboard, and insights all work without a connected calendar. Connecting a calendar unlocks conflict detection and reschedule suggestions. You can use CycleSync as a pure cycle tracker if you prefer — your data stays on device regardless.
iOS supports Apple Calendar (the system default). Android supports Google Calendar and the device calendar. We read events read-only — CycleSync never modifies or deletes events in your calendar. Pro features can reschedule events, but only with your explicit one-tap confirmation.
It's rule-based, not AI. CycleSync uses (1) your cycle history to predict the phase of any date, (2) your per-phase focus settings (focus/rest/neutral), and (3) your calendar events. When a conflict appears, the engine finds available slots on better-phase days. You always see the recommendation and confirm before anything changes.
You can cancel anytime in your store account settings — App Store on iOS, Google Play on Android. CycleSync also has an in-app Manage Subscription link on the Profile screen. Your Pro access continues through the end of the billing period.
Yes. CycleSync works with any cycle length, including irregular or absent cycles. You can log manually, set a default length, and override the prediction per day. The seasonal metaphors (Winter/Spring/Summer/Autumn) are useful framing for energy levels, not just menstruation.
The paywall appears after 8 days of use, giving you plenty of time to explore Free features first. We don't auto-charge a trial. Pro is opt-in.
Email us at support@cyclesync.app or visit our support page. We typically reply within one business day.
CycleSync