Comparison

KnowWhen vs Perimenopause Tracker Diary

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

KnowWhen

This app offers simple, timely guidance for husbands based on their partner's cycle. It helps users understand when to offer support, listen, or give space, fostering better connection and reducing relationship tension.

Highlights
  • Daily simple guidance
  • Phase-based reminders
  • Private logging for patterns
  • Discreet data storage on device
  • Guidance on giving space
  • Guidance on offering support
Read full description

100% FREE => Hey husbands—stop guessing. KnowWhen gives simple guidance based on her cycle so you can support her better, at the right time. Most relationship tension isn’t about effort. It’s about timing. KnowWhen helps you respond with more understanding—when to listen, when to give space, and when to lean in. What you’ll get: - Daily, simple guidance (not essays) - Phase-based reminders so you’re not guessing - Optional private logging to spot your own patterns over time - Built for discretion: your data stays on your device KnowWhen helps you know when to… • Give space • Offer support • Listen instead of fix • Lean in • Reconnect Privacy first. No accounts. No cloud. No tracking. Important KnowWhen provides informational insights. It is not medical advice and not a medical device. It describes population-level tendencies, not a guarantee of your partner's behaviour. Guess Less. Connect More. View Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Perimenopause Tracker Diary

Features
Read full description

You are not imagining it. The sudden heat. Waking at 3am. The word that will not come. Periods that arrive early, late, heavy, or not at all. Perimenopause can start in your late thirties and last for years, and most women are told it is nothing, or that they are simply stressed. This app helps you see it clearly. Log how you feel each day in under a minute, watch the patterns appear, and walk into your doctor's appointment with something better than "I just feel off." DAILY CHECK-IN IN UNDER A MINUTE Tap once to log a symptom, tap again to set the intensity. Add how you slept, how stressed you felt, and a note if you want one. No typing required, no long forms. It is designed to be quick enough that you actually keep doing it. A SUMMARY YOU CAN HAND TO YOUR DOCTOR This is the part women tell us they wanted. The app turns your logs into a clear summary written as a letter, addressed to your doctor by name, covering your most frequent symptoms and how severe they usually are, a chart of your symptom load over time, your cycle lengths and how much they varied, and how sleep and stress tracked alongside everything else. Choose three months, six months or everything you have logged, then bring it to your appointment or send it ahead. Ten minutes with a GP goes a lot further when you have the data in front of you. PATTERNS YOU CANNOT SEE FROM MEMORY Insights build as you log. Which symptoms cluster together. How your cycle length is shifting. Whether the bad nights line up with something. The longer you use it, the more it has to tell you. CYCLE TRACKING THAT EXPECTS IRREGULARITY Most period apps assume a tidy 28 day cycle and then tell you that you are late. This one does not. It expects your cycle to become unpredictable, because in perimenopause that is the point, and it tracks the variation instead of complaining about it. UNDERSTAND WHAT IS HAPPENING Each symptom comes with a short, plain explanation of why it happens during perimenopause. Not a medical library, just enough to put a name to what you are feeling. A GENTLE DAILY REMINDER Set a time that suits you. The reminder skips the days you have already logged, and it is worded like a friend, not a nagging app. YOUR DATA STAYS YOURS Everything you log stays on your device and in your own private iCloud, so a new phone gets it back. No account to create, no sign up, no server of ours, no ads, nothing sold to anyone. We never see your symptoms or your notes. SYMPTOMS YOU CAN TRACK Hot flashes, night sweats, fatigue, mood swings, low mood, anxiety, heart palpitations, brain fog, headache, joint pain, cramps, bloating, breast tenderness, low libido and vaginal dryness. Plus your period, from spotting to heavy, and your sleep and stress. WHO IT IS FOR Women in their late thirties, forties, and fifties who suspect perimenopause has started, who are already in it, or who are heading into menopause and want to understand their own body instead of guessing. You are not imagining it, and it has a name. SUBSCRIPTION Full access is available through a subscription with a free trial, or as a one time purchase. Payment is charged to your Apple Account at confirmation. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple Account settings at any time. This app does not provide medical advice, diagnosis, or treatment. Always talk to a qualified healthcare professional about your symptoms. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

KnowWhen4 screens
Perimenopause Tracker Diary4 screens

Verdict

The call

The clearest difference is price: Perimenopause Tracker Diary at Free against KnowWhen's $4.99. KnowWhen's advantage is in-app purchases (none vs 3). On update cadence, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Perimenopause Tracker Diary is free to download; KnowWhen costs $4.99 up front. Perimenopause Tracker Diary sells 3 in-app purchases, starting at $9.99 per month. KnowWhen asks for nothing beyond the download.

UpkeepUpdate frequency

KnowWhen ships an update every 3 months, Perimenopause Tracker Diary every 2 months. The most recent releases landed on November 6, 2026 and November 13, 2026 respectively.

Scorecard2 real differences · 8 level
KnowWhen versus Perimenopause Tracker Diary: the parameters behind the verdict, then further details
ParameterKnowWhenPerimenopause Tracker Diary
Price$4.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS18.017.0 — better
Further details — not scored
Size6 MB9 MB
Age rating+1712+
DeveloperLaunch RoundJacob Hendrik Huisman

In-app purchases

None

KnowWhen

No in-app purchases

3 purchases

Perimenopause Tracker Diary

Subscriptions2
  • Premium Monthly$9.991 Month
  • Premium Yearly14 Days trial$49.991 Year
One-time1
  • Premium Lifetime$89.99

Questions

Is KnowWhen free?
KnowWhen costs $4.99, with no in-app purchases.
Is Perimenopause Tracker Diary free?
Perimenopause Tracker Diary is free to download, with in-app purchases available.
Do KnowWhen or Perimenopause Tracker Diary have ads?
Neither KnowWhen nor Perimenopause Tracker Diary shows ads.
Which is updated more often, KnowWhen or Perimenopause Tracker Diary?
KnowWhen ships an update every 3 months, and Perimenopause Tracker Diary every 2 months. Most recently, KnowWhen was updated on November 6, 2026 and Perimenopause Tracker Diary on November 13, 2026.

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