Straight answers about understanding your cycle, sharing it on your terms and getting the support you actually want.
Because your body changes throughout the month, and those changes can affect your energy, mood, physical comfort, appetite, sleep and libido. Noticing the pattern helps you plan around your own rhythm — and put words to what you're feeling, rather than wondering why this week feels harder than last.
Start with the first day of your last period and the commonly used average of 28 days, with around 5 days of bleeding. Then adjust as you go. Each new period gives you a more accurate picture of your own pattern.
That's completely normal. 28 days is an average, not a target. Your cycle may be shorter or longer, and it can vary from month to month. Ebb should be treated as a guide rather than a prediction — and the more accurate your dates, the more useful it becomes.
It can, but there isn't a simple formula. Hormonal changes can influence mood, energy and wellbeing for some people — but you're also a whole person with work, family, sleep and everything else going on. Use the cycle as a prompt to check in with yourself, not as an explanation for everything you feel.
No. Some people notice increased desire around ovulation, others notice no change at all. There is no schedule you're supposed to follow. Ebb simply helps you notice your own patterns — what you do with that awareness is entirely up to you.
Start small and be honest about what you need. That might be rest, a walk, a bath, an early night, or simply saying: 'Today is a low-energy day.' You don't have to push through everything. Noticing the pattern makes it easier to be kind to yourself at the right moments.
When you set up Ebb, you can add your partner's email address. They receive a calendar invite and a short note saying you've shared your cycle with them. Nothing else is sent until they tap to accept. From then on, they get simple, respectful guidance about how to support you — written for them, in their own tone.
No. Ebb never works in secret. If you set up the plan, you choose whether to share it. If a partner sets one up about you, they are encouraged to tell you — Ebb is designed to start conversations, not to monitor anyone.
Yes, at any time. It's your cycle and your choice. You can remove their access from your plan page, and their reminders stop immediately.
Don't worry — enter your best estimate and update it when your next period begins. The more accurate the starting date, the more useful the calendar will be.
Just update the date. Your cycle isn't a perfectly predictable 28-day clock, and Ebb adapts to your actual cycle rather than expecting your body to follow a prediction. When your next period starts, that becomes Day 1 of a new cycle.
Predictions will naturally be less accurate when your cycle length varies significantly. In that case, use Ebb as a general awareness tool rather than a predictor. If irregular cycles are new, persistent or worrying you, it's worth discussing them with a healthcare professional.
Absolutely not. Two people can be on the same cycle day and feel completely different. You may have lots of energy before your period, or feel exhausted, or notice almost nothing. Ebb gives you a starting point — your own experience is the real answer.
No. Hormonal changes can be one influence on how you feel, but they never make your opinions, frustrations or emotions less valid. Your feelings are real, whatever day it is. Ebb exists to add context and encourage support — never to dismiss what you're experiencing.
No. You don't need to know which hormone is doing what on which day. A little awareness goes a long way — enough to think: 'Something might be going on physically. Maybe I should take it easy, or say what I need.' That's it.
Short, plain-language emails at the points in your cycle where a little thoughtfulness goes a long way — plus calendar invites they can accept in their own calendar app. The tone is practical and respectful: what's potentially happening, what you may be experiencing, and one useful thing they can do. It never reduces you to hormones.
Every person is different. Ebb uses the menstrual cycle as a guide to help you understand your own rhythm and ask for what you need. It does not predict exactly how you will feel on a particular day.
Your experience matters more than the calendar. Use Ebb to understand yourself better — never to explain yourself away.
If something feels different, difficult or concerning, trust yourself — and where appropriate, speak to a healthcare professional.