# Circular Ring vs SunNow

The clearest difference is update cadence: SunNow at every 4 days against Circular Ring's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Circular Ring ships an update every 2 weeks, SunNow every 4 days. The most recent releases landed on October 14, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Circular Ring | SunNow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.8 (501 ratings)](https://appshunter.io/ios/app/circular-ring-health-tracker/id1583942047/reviews)** | — |
| Number of ratings | **501** | — |
| Positive reviews | 16.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | Free | — |
| Size | 193 MB | 33 MB |
| Requires iOS | 16.6 | 16.6 |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [Circular](https://appshunter.io/developer/1583942049) | [siHealth Ltd.](https://appshunter.io/developer/1123107334) |

## What reviewers say

### Circular Ring

[App page](https://appshunter.io/ios/app/circular-ring-health-tracker/id1583942047)

This platform offers comprehensive health tracking and improvement tools. It provides deep insights into sleep, recovery, stress, heart health, and activity, with personalized recommendations from an AI coach to help users understand and optimize their wellness.

**Highlights:** Sleep Monitoring, Energy Score, Heart Rhythm Monitoring, Stress Tracking, Coherence Training, AI Health Coach (Kira)

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

**In-app purchases:** none


### SunNow

[App page](https://appshunter.io/ios/app/sunnow/id6748296421)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Circular Ring free?

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

### Is SunNow free?

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

### Do Circular Ring or SunNow have ads?

Neither Circular Ring nor SunNow shows ads.

### Which is updated more often, Circular Ring or SunNow?

Circular Ring ships an update every 2 weeks, and SunNow every 4 days. Most recently, Circular Ring was updated on October 14, 2026 and SunNow on September 28, 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.*