# Zuul Systems vs Kairos

The clearest difference is rating: Kairos at 5.0 against Zuul Systems's 3.9. Zuul Systems's advantage is in-app purchases (none vs 2) and ratings volume (35 vs 3). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Kairos sells 2 in-app purchases, starting at $4.99 per month. Zuul Systems asks for nothing beyond the download.

Kairos holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Zuul Systems has 35 ratings behind it against 3, so its average is the more settled of the two.

Zuul Systems ships an update weekly, Kairos every 2 weeks. The most recent releases landed on October 16, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Zuul Systems | Kairos |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (35 ratings)](https://appshunter.io/ios/app/zuul-systems/id1438385504/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/kairos-shift-tracker/id6792157855/reviews)** |
| Number of ratings | **35** | 3 |
| Positive reviews | 68.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | **Free** | Subscription |
| Size | 52 MB | 4 MB |
| Requires iOS | **15.6** | 26.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [ZUUL SYSTEMS, LLC](https://appshunter.io/developer/1426243937) | [BOAZ TIMOTHY WHEALY](https://appshunter.io/developer/6791718585) |

## What reviewers say

### Zuul Systems

[App page](https://appshunter.io/ios/app/zuul-systems/id1438385504)

Grant seamless entry to your gated community for guests. This app allows residents to send digital passes, reducing wait times and enhancing security. Registered guests can easily request passes and access community amenities.

**Highlights:** Send digital guest passes, Reduce gate wait times, Improve community security, Guest pass requests, Contact integration, QR code passes, Add passes to calendar

**Features:** macOS Compatibility

**In-app purchases:** none


### Kairos

[App page](https://appshunter.io/ios/app/kairos-shift-tracker/id6792157855)

This app helps shift workers and their families stay synchronized by providing a clear, shareable schedule. It allows users to easily track rotations, see real-time duty status, and receive notifications about upcoming shifts. Designed for professionals with complex schedules, it aims to eliminate guesswork and keep everyone informed.

**Highlights:** Shareable shift calendar, Real-time duty status, Customizable shift rotations, Home screen widgets, Apple Watch support, Multiple calendar tracking

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kairos Pro - Monthly | $4.99 | per month |
| Kairos Pro - Yearly | $49.99 | per year |


## Frequently asked questions

### Is Zuul Systems free?

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

### Is Kairos free?

Kairos is free to download, with in-app purchases available.

### Which has better reviews, Zuul Systems or Kairos?

Kairos is rated higher. Zuul Systems averages 3.9 out of 5 from 35 ratings, while Kairos averages 5.0 from 3 ratings.

### Do Zuul Systems or Kairos have ads?

Neither Zuul Systems nor Kairos shows ads.

### Which is updated more often, Zuul Systems or Kairos?

Zuul Systems ships an update weekly, and Kairos every 2 weeks. Most recently, Zuul Systems was updated on October 16, 2026 and Kairos on October 1, 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.*