# SlackLess vs Polyphasic Sleep

The clearest difference is in-app purchases: SlackLess at none against Polyphasic Sleep's 5. Polyphasic Sleep's advantage is update cadence (weekly vs every 10 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Polyphasic Sleep sells 5 in-app purchases, starting at $4.99 per 7 days. SlackLess asks for nothing beyond the download.

SlackLess ships an update every 10 months, Polyphasic Sleep weekly. The most recent releases landed on October 11, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | SlackLess | Polyphasic Sleep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/polyphasic-sleep-polynap/id6746938552/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Weekly** |
| Monetization | — | Freemium |
| Size | 131 MB | 66 MB |
| Requires iOS | **16.6** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Daniyar Kurmanbayev](https://appshunter.io/developer/1820100243) | [SALIM TANER CELIK](https://appshunter.io/developer/1799263246) |

## What reviewers say

### SlackLess

[App page](https://appshunter.io/ios/app/slackless/id6450131188)

**In-app purchases:** none


### Polyphasic Sleep

[App page](https://appshunter.io/ios/app/polyphasic-sleep-polynap/id6746938552)

This app guides users through adopting and maintaining polyphasic sleep schedules. It offers personalized recommendations, smart alarms, and progress tracking to help users gain more control over their time and build consistent sleep routines.

**Highlights:** Personalized sleep schedule recommendations, Multiple polyphasic sleep schedule exploration, Smart alarms and nap reminders, Progress tracking for adaptation and consistency, Routine-building feedback, Explore various sleep cycles (Everyman, Uberman, etc.)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PolyNap Premium Weekly | $4.99 | per 7 days |
| PolyNap Premium Monthly | $8.99 | per month |
| Premium Annual Discount | $24.99 | per year |
| PolyNap Premium Yearly | $34.99 | per year |
| PolyNap Premium Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is SlackLess free?

SlackLess is free to download, with no in-app purchases.

### Is Polyphasic Sleep free?

Polyphasic Sleep is free to download, with in-app purchases available.

### Do SlackLess or Polyphasic Sleep have ads?

Neither SlackLess nor Polyphasic Sleep shows ads.

### Which is updated more often, SlackLess or Polyphasic Sleep?

SlackLess ships an update every 10 months, and Polyphasic Sleep weekly. Most recently, SlackLess was updated on October 11, 2026 and Polyphasic Sleep on October 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.*