# Echo AR Scanner vs Circadian Rhythm Light Meter

The clearest difference is in-app purchases: Echo AR Scanner at none against Circadian Rhythm Light Meter's 2. Echo AR Scanner also leads on rating (5.0 vs 4.6). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Circadian Rhythm Light Meter sells 2 in-app purchases, starting at $0.99 per month. Echo AR Scanner asks for nothing beyond the download.

Echo AR Scanner holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 6 and 5 respectively.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Echo AR Scanner | Circadian Rhythm Light Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/echo-ar-scanner/id1438748625/reviews)** | [4.6 (5 ratings)](https://appshunter.io/ios/app/circadian-rhythm-light-meter/id6761270886/reviews) |
| Number of ratings | **6** | 5 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 6 MB | 44 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [ECHO Interaction Group Inc.](https://appshunter.io/developer/399617906) | [Contechity AB](https://appshunter.io/developer/1649290454) |

## What reviewers say

### Echo AR Scanner

[App page](https://appshunter.io/ios/app/echo-ar-scanner/id1438748625)

Experience printed materials and objects in augmented reality. Scan QR codes or point your device at enhanced items to access critical client information. New experiences are added weekly, so enable notifications.

**Highlights:** Augmented reality experiences, QR code scanning, Object recognition AR, Access client information, Regular content updates

**Features:** macOS Compatibility

**In-app purchases:** none


### Circadian Rhythm Light Meter

[App page](https://appshunter.io/ios/app/circadian-rhythm-light-meter/id6761270886)

Measure the melanopic content of your light environment to support your body's natural sleep-wake cycle. Get actionable recommendations to improve sleep quality and daytime alertness by understanding how different light sources affect your circadian rhythm.

**Highlights:** Measure melanopic equivalent daylight illuminance (mEDI), Analyze melanopic daylight efficacy ratio (mDER), Calculate melanopic/photopic ratio (M/P), Get actionable lighting recommendations, Select light source types for accurate readings, Save measurements with timestamps and comments

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access (Month) | $0.99 | per month |
| Full Access (Lifetime) | $14.99 | one-time |


## Frequently asked questions

### Is Echo AR Scanner free?

Echo AR Scanner is free to download, with no in-app purchases.

### Is Circadian Rhythm Light Meter free?

Circadian Rhythm Light Meter is free to download, with in-app purchases available.

### Which has better reviews, Echo AR Scanner or Circadian Rhythm Light Meter?

Echo AR Scanner is rated higher. Echo AR Scanner averages 5.0 out of 5 from 6 ratings, while Circadian Rhythm Light Meter averages 4.6 from 5 ratings.

### Do Echo AR Scanner or Circadian Rhythm Light Meter have ads?

Neither Echo AR Scanner nor Circadian Rhythm Light Meter shows ads.

### Which is updated more often, Echo AR Scanner or Circadian Rhythm Light Meter?

Echo AR Scanner ships an update every 2 months, and Circadian Rhythm Light Meter every 2 months. Most recently, Echo AR Scanner was updated on November 2, 2026 and Circadian Rhythm Light Meter on November 5, 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.*