Free
$0
Free with no time limit
- Google Calendar sync and automatic correction
- Advance reminders in Google Calendar
- Simple recording link
- LINE linking and recording by chat in Japan
Cycle planning in the calendar you already use
Saical
Period predictions that stay in sync with Google Calendar.
When the date shifts, future predictions shift with it.
Enter the latest start date to add six cycle predictions. Record the actual date later, and Saical updates the future events together.
Continue with Google
Your period history is not stored on our server
Next prediction
Fri, Aug 14
Google Calendar
Reminder set: 7 days before
Set up in three steps
No daily logging routine and no new calendar to maintain.
- 1Sign in with Google
Grant only the calendar permission needed to create and update prediction events.
- 2Choose your cycle settings
Enter the average cycle length, period length, and reminder timing.
- 3Enter the latest start date
Six predictions appear in Google Calendar immediately.
Designed to keep less health data
Your history stays in your Google Calendar. Saical keeps only the latest start date needed for the next calculation, your settings, and the IDs of events it created.
No accumulated history
Each new start date overwrites the previous server value.
Your calendar stays in control
Edit or delete events in Google Calendar at any time.
Optional support
Core features are free. Support payments never gate functionality.
Plans
Core calendar features stay free. Choose Plus for more flexible notifications.
Plus
$3 monthly
$24 annually
- Everything in Free
- Custom reminder day and time
- Web Push notifications
- Proactive LINE reminders and one-tap recording from reminders in Japan
Continue with Google
Choose a plan after signing in. Optional support does not unlock features.
Keep cycle planning where your plans already live.
See predictions and reminders without opening a dedicated app every day.