# CIRCUL+ vs Ultrahuman Ring Sizer

The clearest difference is rating: CIRCUL+ at 3.3 against Ultrahuman Ring Sizer's 2.0. CIRCUL+ also leads on device support (3 vs 1) and iOS requirement (12.0 vs 16.0). On price, review sentiment, ratings volume and update cadence there is nothing between them.

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

CIRCUL+ holds the better App Store score, 3.3 against 2.0. Both are backed by a comparable volume of ratings — 36 and 24 respectively. Written reviews point the same way: 24% of CIRCUL+'s written reviews are positive against 18% of Ultrahuman Ring Sizer's.

CIRCUL+ ships an update every 5 weeks, Ultrahuman Ring Sizer monthly. The most recent releases landed on October 2, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | CIRCUL+ | Ultrahuman Ring Sizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (36 ratings)](https://appshunter.io/ios/app/circul-plus/id1493479787/reviews)** | [2.0 (24 ratings)](https://appshunter.io/ios/app/ultrahuman-ring-sizer/id6452756334/reviews) |
| Number of ratings | **36** | 24 |
| Positive reviews | **23.5% of reviews** | 17.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Free | Free |
| Size | 157 MB | 45 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [BodiMetrics, LLC](https://appshunter.io/developer/1037690466) | [ULTRAHUMAN HEALTHCARE PRIVATE LIMITED](https://appshunter.io/developer/1491286708) |

## What reviewers say

### CIRCUL+

[App page](https://appshunter.io/ios/app/circul-plus/id1493479787)

This utility app connects to a wearable device to monitor vital health metrics like oxygen saturation, heart rate, and sleep patterns. It generates health reports and syncs data with Apple Health, offering insights into your well-being.

**Highlights:** Bluetooth connectivity, Daily, operation, and sleep monitoring, Blood pressure monitoring (latest ring), Health data synchronization with Apple Health, Step counting integration, Health report generation

**Features:** macOS Compatibility

**In-app purchases:** none


### Ultrahuman Ring Sizer

[App page](https://appshunter.io/ios/app/ultrahuman-ring-sizer/id6452756334)

Instantly determine your ring size by taking a photo of your hand. The app uses advanced AI vision algorithms to accurately calculate your perfect fit, requiring only a standard-sized card in the frame for reference.

**Highlights:** Instant ring size calculation, AI-powered vision algorithm, Photo-based measurement, Requires standard card for reference, Accurate fit determination

**In-app purchases:** none


## Frequently asked questions

### Is CIRCUL+ free?

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

### Is Ultrahuman Ring Sizer free?

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

### Which has better reviews, CIRCUL+ or Ultrahuman Ring Sizer?

CIRCUL+ is rated higher. CIRCUL+ averages 3.3 out of 5 from 36 ratings, while Ultrahuman Ring Sizer averages 2.0 from 24 ratings.

### Do CIRCUL+ or Ultrahuman Ring Sizer have ads?

Neither CIRCUL+ nor Ultrahuman Ring Sizer shows ads.

### Which is updated more often, CIRCUL+ or Ultrahuman Ring Sizer?

CIRCUL+ ships an update every 5 weeks, and Ultrahuman Ring Sizer monthly. Most recently, CIRCUL+ was updated on October 2, 2026 and Ultrahuman Ring Sizer on October 13, 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.*