# Zleep vs KnowWhen

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.

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.

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.

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

## The numbers

| Metric | Zleep | KnowWhen |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/zleep-beat-insomnia/id6470314762/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/knowwhen/id6758948095/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 78 MB | 6 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | +17 |
| Developer | [Youniq Health](https://appshunter.io/developer/1649781852) | [Launch Round](https://appshunter.io/developer/1580265297) |

## What reviewers say

### Zleep

[App page](https://appshunter.io/ios/app/zleep-beat-insomnia/id6470314762)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $11.99 | per month |
| 3-months-Sleep-Reset | $49.00 | per 3 months |
| Health Partner Program | $59.99 | per year |
| Annual_Sleep_Reset | $60.00 | per year |
| Full sleep reset | $89.99 | per 3 months |
| 3 months | $89.99 | per 3 months |
| Zleep Pro Plan | $89.99 | per year |
| Zleep premium (Annual) | $89.99 | per year |
| Annual_Bundle | $109.99 | per year |


### KnowWhen

[App page](https://appshunter.io/ios/app/knowwhen/id6758948095)

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

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*