# Polyphasic Sleep Tracker vs Circles

The clearest difference is price: Circles at Free against Polyphasic Sleep Tracker's $2.49. Circles also leads on update cadence (weekly vs every 7 months) and iOS requirement (15.1 vs 17.0). Polyphasic Sleep Tracker's advantage is in-app purchases (none vs 2). On ads and device support there is nothing between them.

Circles is free to download; Polyphasic Sleep Tracker costs $2.49 up front. Circles sells 2 in-app purchases, starting at $6.99 per month. Polyphasic Sleep Tracker asks for nothing beyond the download.

Polyphasic Sleep Tracker ships an update every 7 months, Circles weekly. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Polyphasic Sleep Tracker | Circles |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Weekly** |
| Monetization | Paid | — |
| Size | 2 MB | 35 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [FiveSheep OU](https://appshunter.io/developer/1725654318) | [Carlos Puigjaner Vallet](https://appshunter.io/developer/1896519786) |

## 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


### Circles

[App page](https://appshunter.io/ios/app/circles-day-by-day/id6767915685)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $6.99 | per month |
| Yearly Membership | $49.99 | per year |


## Frequently asked questions

### Is Polyphasic Sleep Tracker free?

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

### Is Circles free?

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

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

Neither Polyphasic Sleep Tracker nor Circles shows ads.

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

Polyphasic Sleep Tracker ships an update every 7 months, and Circles weekly. Most recently, Polyphasic Sleep Tracker was updated on October 14, 2026 and Circles on October 7, 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.*