Comparison

Zleep vs KnowWhen

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

Head to head
About

Zleep

This app offers a digital treatment program to help overcome insomnia using neuroscience and psychology. It provides personalized, step-by-step therapy and actionable micro-actions to retrain your brain for better sleep, without medication.

Highlights
  • Personalized step-by-step therapy
  • Neuroscience and CBT-based approach
  • Actionable daily micro-actions
  • Sleep journaling and mood tracking
  • Data integration with wearables
  • Apple Health integration
Features
Read full description

Digital treatment for better sleep Discover Zleep, your digital treatment for overcoming insomnia using neuroscience and psychology. Zleep offers a personalized, step-by-step program tailored to meet your individual needs. Our approach integrates years of research, providing a 100% pill-free method to address the root cause of your insomnia. Zleep doesn't just track your sleep; it provides you with step by step, actionable program designed to actively retrain your brain for sleep. Our program harnesses the power of neuroscience and Cognitive Behavioral Therapy (CBT), methodologies backed by decades of clinical research. Cognitive Behavioral Therapy for Insomnia (CBT-I) is recognized as the most effective, evidence-based method for resolving insomnia. Zleep includes: Dynamic Bite-Sized Therapy: Engage daily with custom strategies, tools, and insights rooted in neuroscience to retrain your brain for sleep. Daily Micro-Actions: Implement science-based micro-actions designed by behavioral experts to establish new, lasting habits for enhanced sleep health. Journaling and Haptic Feedback: Engage in systematic reflection to monitor you sleep, moods, and energy levels. Data Integration: Whether you connect a wearable device or manually input your data, Zleep dynamically utilizes this information to personalize and refine your experience continuously, adapting in real time to your unique sleep patterns. This App integrates with Apple Health App to identify your sleep patterns and automatically fill your sleep logs. Let’s put Insomnia to Zleep! Terms of use: https://www.zleep.app/terms-conditions Privacy policy: https://www.zleep.app/privacy-policy

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/

Screenshots

Zleep4 screens
KnowWhen4 screens

Verdict

The call

The clearest difference is price: Zleep at Free against KnowWhen's $4.99. Zleep also leads on update cadence (weekly vs every 3 months) and device support (3 vs 1). KnowWhen's advantage is in-app purchases (none vs 9). On rating, review sentiment, ratings volume and ads 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

Zleep is free to download; KnowWhen costs $4.99 up front. Zleep sells 9 in-app purchases, starting at $11.99 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 Zleep against 5.0 for KnowWhen. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Zleep ships an update weekly, KnowWhen every 3 months. The most recent releases landed on November 4, 2026 and November 6, 2026 respectively.

Scorecard6 real differences · 4 level
Zleep versus KnowWhen: the parameters behind the verdict, then further details
ParameterZleepKnowWhen
PriceFree — better$4.99
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings2 — better1
Update frequencyWeekly — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better18.0
Further details — not scored
Size78 MB6 MB
Age rating4++17
DeveloperYouniq HealthLaunch Round

Customer experience

Zleep

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews16 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

KnowWhen

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

In-app purchases

9 purchases

Zleep

Subscriptions9
  • 1 Month7 Days trial$11.991 Month
  • 3-months-Sleep-Reset$49.003 Months
  • Health Partner Program$59.991 Year
Show 6 more
  • Annual_Sleep_Reset$60.001 Year
  • Full sleep reset$89.993 Months
  • 3 months$89.993 Months
  • Zleep Pro Plan$89.991 Year
  • Zleep premium (Annual)7 Days trial$89.991 Year
  • Annual_Bundle$109.991 Year
None

KnowWhen

No in-app purchases

Questions

Is Zleep free?
Zleep is free to download, with in-app purchases available.
Is KnowWhen free?
KnowWhen costs $4.99, with no in-app purchases.
Which has better reviews, Zleep or KnowWhen?
Zleep and KnowWhen are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do Zleep or KnowWhen have ads?
Neither Zleep nor KnowWhen shows ads.
Which is updated more often, Zleep or KnowWhen?
Zleep ships an update weekly, and KnowWhen every 3 months. Most recently, Zleep was updated on November 4, 2026 and KnowWhen on November 6, 2026.

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