Comparison

KnowWhen vs Cycl

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

Cycl

This app personalizes your daily supplement intake based on your menstrual cycle phase. It offers cycle-aware scheduling, conflict detection for interactions, and phase-adaptive recommendations. Track your doses with reminders for a smarter approach to self-care.

Highlights
  • Cycle-aware supplement scheduling
  • Supplement interaction conflict detection
  • Phase-adaptive recommendations
  • Dose tracking with reminders
  • Personalized daily supplement stack
Features
Read full description

Your cycle shapes how your body responds to everything, including the supplements you take. Cycl is the first supplement management app built around your menstrual cycle, personalizing your daily stack based on your current phase. Not a period tracker. Not a supplement store. A smarter way to take care of yourself. WHAT CYCL DOES - Cycle-aware scheduling: Your supplement plan updates automatically across four daily time slots as your phase changes. - Conflict detection: Cycl flags supplement interactions in your stack before you take them. - Phase-adaptive recommendations: Get suggestions tuned to where you are in your cycle. - Dose tracking with reminders: Stay consistent without thinking about it. Simple onboarding. Enter your cycle info, build your stack, and your personalized plan is ready in minutes. We also offer premium features with subscriptions, such as a smarter supplement stack generator and in-depth women's health supplement insights, to help you get the most out of your supplement routines. Cycl is not a medical app and does not provide medical advice. Always consult a healthcare professional before making changes to your supplement routine. Terms of Conditions: https://www.cyclsupp.app/tos Privacy Policy: https://www.cyclsupp.app/privacy

Screenshots

KnowWhen4 screens
Cycl4 screens

Verdict

The call

The clearest difference is price: Cycl at Free against KnowWhen's $4.99. Cycl also leads on update cadence (every 5 days vs every 3 months) and ratings volume (4 vs 1). KnowWhen's advantage is in-app purchases (none vs 2) and iOS requirement (18.0 vs 26.0). On rating, review sentiment, ads and device support 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

Cycl is free to download; KnowWhen costs $4.99 up front. Cycl sells 2 in-app purchases, starting at $4.99 per month. KnowWhen asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for KnowWhen against 5.0 for Cycl. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

KnowWhen ships an update every 3 months, Cycl every 5 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

Scorecard6 real differences · 4 level
KnowWhen versus Cycl: the parameters behind the verdict, then further details
ParameterKnowWhenCycl
Price$4.99Free — better
Rating5.0 (1 ratings)5.0 (4 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings14 — better
Update frequencyEvery 3 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhoneiPhone
Requires iOS18.0 — better26.0
Further details — not scored
Size6 MB20 MB
Age rating17+17+
DeveloperLaunch RoundJustin Shieh

Customer experience

KnowWhen

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Cycl

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

KnowWhen

No in-app purchases

2 purchases

Cycl

Subscriptions2
  • Cycl Pro - Monthly3 Days trial$4.991 Month
  • Cycl Pro - Yearly3 Days trial$29.991 Year

Questions

Is KnowWhen free?
KnowWhen costs $4.99, with no in-app purchases.
Is Cycl free?
Cycl is free to download, with in-app purchases available.
Which has better reviews, KnowWhen or Cycl?
KnowWhen and Cycl are both rated 5.0 out of 5 on the App Store, from 1 and 4 ratings respectively.
Do KnowWhen or Cycl have ads?
Neither KnowWhen nor Cycl shows ads.
Which is updated more often, KnowWhen or Cycl?
KnowWhen ships an update every 3 months, and Cycl every 5 days. Most recently, KnowWhen was updated on October 24, 2026 and Cycl on October 31, 2026.

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