# Project PROTECTS vs KHR

Project PROTECTS and KHR are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Project PROTECTS ships an update monthly, KHR fortnightly. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Project PROTECTS | KHR |
| --- | --- | --- |
| 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 | **Fortnightly** |
| Monetization | Free | — |
| Size | 80 MB | 47 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Vibrent Health, Inc.](https://appshunter.io/developer/1236953707) | [Laina Enterprises, Inc.](https://appshunter.io/developer/1588943641) |

## 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


### KHR

[App page](https://appshunter.io/ios/app/khr/id6743888324)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Project PROTECTS free?

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

### Is KHR free?

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

### Do Project PROTECTS or KHR have ads?

Neither Project PROTECTS nor KHR shows ads.

### Which is updated more often, Project PROTECTS or KHR?

Project PROTECTS ships an update monthly, and KHR fortnightly. Most recently, Project PROTECTS was updated on October 17, 2026 and KHR 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.*