Dalkong · Ovulation Calendar

Dalkong is a cute ovulation and fertility calendar for couples trying to conceive. Log your period start dates and it predicts your next ovulation and fertile window — and lets you mark intimate days (♥) right on the calendar so you never miss the timing. No account, no server — everything stays on this phone.

■ What you can do
· Log period start dates → auto-predict next period, ovulation & fertile window
· See period days and fertile days by color on a month calendar
· Mark intimate days with a ♥ to manage conception timing
· Flip through months to view and edit past logs
· Get a gentle reminder as your next period approaches
· Predictions get sharper the more you log

■ Privacy first
· No sign-up, no login, no cloud upload
· Your sensitive health and conception data stays on your device — nothing sent to a server

■ Who it's for
· Anyone planning a pregnancy who wants to track ovulation and fertile days
· People who want to log cycles and intimate days simply, without clutter
· Anyone who wants their health data to stay on their own phone

■ Please note
Predictions are approximate estimates. Not intended for medical or contraceptive use.

Log your first period start today and plan for pregnancy with Dalkong. 🌙🫘

Recent changes:
Welcome to Dalkong! 🌙🫘
· Cycle logging with next-period, ovulation & fertile-window prediction
· Mark intimate days (♥) to manage conception timing
· Month-by-month calendar and a reminder before your next period
· All data stays on your phone — no account
Give it a try and let us know what you think.