KnowWhen vs WellPeriod
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Daily simple guidance
- Phase-based reminders
- Private logging for patterns
- Discreet data storage on device
- Guidance on giving space
- Guidance on offering support
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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/
WellPeriod
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WellPeriod is the period and cycle tracker that doesn't sell you and doesn't chase you. Most cycle apps show one confident date, push a paywall every few taps, quietly move free features behind a subscription, and send your data to advertisers. WellPeriod was built against each of those complaints. HONEST PREDICTIONS • Your next period is shown as a window, not a single date: "Expected Sep 24–30", with a confidence level. • Accuracy score: the app re-runs its own predictions on your past cycles and tells you how many landed within ±1 or ±2 days. No other tracker shows its own error. • Irregular cycles, PCOS and perimenopause get a wider, honest window and a "learning" state instead of a made-up date. NO ACCOUNT, NO DATA SELLING • No sign-up, no email, no password. Your logs stay on your iPhone and in your private iCloud. • No ad networks, no Meta or Google SDKs. • "What leaves your phone": a screen inside the app lists every third party it talks to and the exact anonymous events sent. Health data is never included. • Face ID lock, a discreet neutral app icon and neutral notifications (Pro). NO NAGGING • The paywall appears only when you tap a Pro feature. One automatic prompt, once, ever. • The features listed below as free stay free. That promise is printed on the paywall itself. FREE FOREVER • Period and ovulation prediction with window and confidence • Calendar with the next 3 cycles • Full daily log: flow, mood, energy, 39 symptoms, sex, cervical mucus, basal temperature, pill, notes • Reminders: period in 2 days, period today, late, fertile window, ovulation, daily log, pill • Apple Health sync both ways • Daily insight, guides, CSV export, delete everything in one tap WELLPERIOD PRO • Symptom patterns by cycle phase ("headaches show up in your luteal phase 4 out of 5 cycles") • Mood and energy by phase • 4-week planner: rest, build, push, peak and wind-down windows synced to your cycle • 12-month forecast • Temperature chart from manual BBT or Apple Watch wrist temperature, no thermometer needed • Full cycle history and PDF report for your doctor • Face ID lock, discreet icon, discreet notifications PERIMENOPAUSE, FOR REAL Palpitations, brain fog, night sweats, dryness and more, plus a dedicated goal mode with its own insights. APPLE HEALTH AND APPLE WATCH Menstrual flow and basal body temperature sync both ways with Apple Health. If you sleep with an Apple Watch, WellPeriod reads your wrist temperature to help confirm ovulation. PRICING WellPeriod Pro is optional. Monthly $5.99, yearly $34.99 (7-day free trial, then auto-renews) or a one-time lifetime purchase of $69.99. Prices may vary by country. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; payment is charged to your Apple ID account. You can manage or cancel subscriptions in your App Store account settings. Any unused portion of a free trial is forfeited when you purchase a subscription. Privacy policy: https://wellperiod.com/privacy Terms of use: https://wellperiod.com/terms WellPeriod is not a contraceptive method and does not replace medical advice. Predictions are estimates based on the data you log.
Screenshots
Verdict
The clearest difference is price: WellPeriod at Free against KnowWhen's $4.99. KnowWhen's advantage is in-app purchases (none vs 3). On 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
WellPeriod is free to download; KnowWhen costs $4.99 up front. WellPeriod sells 3 in-app purchases, starting at $5.99 per month. KnowWhen asks for nothing beyond the download.
| Parameter | KnowWhen | WellPeriod |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone |
| Requires iOS | 18.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 6 MB | 16 MB |
| Age rating | +17 | 12+ |
| Developer | Launch Round | Abraham Rubio |
In-app purchases
KnowWhen
No in-app purchases
WellPeriod
- Pro Monthly$5.991 Month
- Pro Yearly7 Days trial$34.991 Year
- Pro Lifetime$69.99









