Perimenopause, written down day by day
Your periods change, sleep gets lighter and symptoms come and go for months at a time. Her Good Days keeps the dates, so you can see what is shifting and bring it to your doctor.
Perimenopause is the run-up to menopause, when hormone levels rise and fall unevenly. It usually affects women between 45 and 55, and can start earlier. Menopause itself is dated 12 months after your last period.[1][3]
Common changes include irregular periods, hot flashes, night sweats, poor sleep, mood changes and brain fog.[2] A short daily log shows which of them you have, how often, and what tends to come before them.
What changes in perimenopause
Cycles are often the first sign. They can get shorter or longer, with a skipped month here and there and flow that's heavier or lighter than you're used to.[2][4]
Other changes people report:
- hot flashes and night sweats
- waking long before your usual time, or trouble falling asleep
- low mood, irritability or anxiety that feels new
- trouble finding words, or brain fog[5]
- joint aches, and headaches that are worse than usual
- weight gain, often around the stomach[2][3]
Not everyone gets all of these, and some come and go. That's why a record over weeks tells you more than a guess at the end of a bad month.
What to log, and why it helps at the doctor
A few taps a day is enough. In Her Good Days, a woman in perimenopause usually sees Hot flash, Period, Sleep, Mood and Brain fog in her Log menu first, and she can change that.
| Log | What it shows after a month |
|---|---|
| Period start and flow | Cycle lengths in days, and any gap over 60 days |
| Hot flash or night sweat | How many a week, and at what time of day |
| Sleep | Hours slept and wake-ups, next to nights with night sweats |
| Mood and energy | Low days against your cycle and your sleep |
| Medication and supplements | Which days you took them, from your reminders |
The doctor report puts those dates on a few pages. In a short appointment, "14 hot flashes last week, most after 2 PM" is easier to act on than "they're bad lately".
When to see a doctor
Book an appointment if you think you have perimenopause symptoms and want to know your options, or if your periods get heavier or last longer than usual, come less than 21 days apart, or you bleed after sex or between periods. Any bleeding after 12 months with no period needs a check.[2][4][6]
Moving through it
The app has walking, gentle strength and stretching programs. Sarah leads them, each session has an easier version on screen, and walks and stretches also come as audio only. How the programs work.
Other life stages
Periods and cycle
Period dates, flow, cramps and PMS.
Trying to conceive
Cycle notes and tests to share with your doctor.
Pregnancy
Your week, appointments and symptoms.
Postpartum
Recovery, broken sleep and mood after birth.
Menopause
Hot flashes, night sweats and sleep.
After menopause
Strength, bones, sleep and medication.
Teens
First periods, with teen mode for 13 to 17.
The features for this stage
The screens you would use most. Every feature in the app
Questions
What age does perimenopause start?
ACOG says hormone levels can start to swing in your 30s and 40s, and the NHS says perimenopause and menopause usually affect women between 45 and 55. The app works the same at any age.
How do I know if it is perimenopause?
The NHS says there is no routine test, and a doctor may diagnose it from your age and symptoms. A log of period dates and symptoms gives that conversation something concrete to work with.
Can the app tell me I am in perimenopause?
No. You pick your stage yourself, and the app never labels you. If your cycles change, it may ask whether you want to update your stage, and you can say not now.
Does it still track my periods?
Yes. In perimenopause the cycle stays on, with period dates and flow next to your symptoms, so long or skipped cycles show up in the same view.
Sources
- NHS: What are menopause and perimenopause? Checked October 30, 2026
- NHS: Symptoms of menopause and perimenopause Checked October 30, 2026
- ACOG: The menopause years Checked October 30, 2026
- ACOG: Perimenopausal bleeding and bleeding after menopause Checked October 30, 2026
- The Menopause Society: Perimenopause Checked October 30, 2026
- NHS: Irregular periods Checked October 30, 2026
Spotted an error? Write to [email protected]. How we check health information.