# Polyphasic Sleep Tracker vs NIX

The clearest difference is price: NIX at Free against Polyphasic Sleep Tracker's $2.49. NIX also leads on update cadence (weekly vs every 7 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

NIX is free to download; Polyphasic Sleep Tracker costs $2.49 up front. Neither carries in-app purchases, so what you see is what you pay.

Polyphasic Sleep Tracker ships an update every 7 months, NIX weekly. The most recent releases landed on September 28, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Polyphasic Sleep Tracker | NIX |
| --- | --- | --- |
| Price | $2.49 | **Free** |
| Rating | **[3.6 (5 ratings)](https://appshunter.io/ios/app/polyphasic-sleep-tracker/id6449134102/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Weekly** |
| Monetization | Paid | — |
| Size | 2 MB | 40 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [FiveSheep OU](https://appshunter.io/developer/1725654318) | [NIX Development LLC](https://appshunter.io/developer/6780252045) |

## What reviewers say

### Polyphasic Sleep Tracker

[App page](https://appshunter.io/ios/app/polyphasic-sleep-tracker/id6449134102)

This app helps you master polyphasic sleep schedules to optimize your waking hours. It offers customizable plans, smart reminders, and HealthKit integration to track and adjust your sleep patterns.

**Highlights:** Customizable sleep plans, Smart sleep reminders, HealthKit integration, Dark mode, Multiple sleep schedule options

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### NIX

[App page](https://appshunter.io/ios/app/nix-scoreboard/id6784726128)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Polyphasic Sleep Tracker free?

Polyphasic Sleep Tracker costs $2.49, with no in-app purchases.

### Is NIX free?

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

### Do Polyphasic Sleep Tracker or NIX have ads?

Neither Polyphasic Sleep Tracker nor NIX shows ads.

### Which is updated more often, Polyphasic Sleep Tracker or NIX?

Polyphasic Sleep Tracker ships an update every 7 months, and NIX weekly. Most recently, Polyphasic Sleep Tracker was updated on September 28, 2026 and NIX on September 30, 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.*