# Project PROTECTS vs Rhythm Lighting

The clearest difference is update cadence: Rhythm Lighting at every 2 weeks against Project PROTECTS's monthly. 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.

Project PROTECTS ships an update monthly, Rhythm Lighting every 2 weeks. The most recent releases landed on October 17, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Project PROTECTS | Rhythm Lighting |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/project-protects/id6497479699/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 80 MB | 37 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Vibrent Health, Inc.](https://appshunter.io/developer/1236953707) | [DT Concepts, LLC](https://appshunter.io/developer/1872148996) |

## What reviewers say

### Project PROTECTS

[App page](https://appshunter.io/ios/app/project-protects/id6497479699)

This research study invites adults in the US to help understand the effects of respiratory infections. Participants need a smartphone, email, and internet access to contribute to vital health research.

**Highlights:** Participate in health research, Understand infection effects, Smartphone required, US-based eligibility, Contribute to scientific understanding

**Features:** macOS Compatibility

**In-app purchases:** none


### Rhythm Lighting

[App page](https://appshunter.io/ios/app/rhythm-lighting/id6758312802)

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

**In-app purchases:** none


## Frequently asked questions

### Is Project PROTECTS free?

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

### Is Rhythm Lighting free?

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

### Do Project PROTECTS or Rhythm Lighting have ads?

Neither Project PROTECTS nor Rhythm Lighting shows ads.

### Which is updated more often, Project PROTECTS or Rhythm Lighting?

Project PROTECTS ships an update monthly, and Rhythm Lighting every 2 weeks. Most recently, Project PROTECTS was updated on October 17, 2026 and Rhythm Lighting on October 2, 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.*