Zuul Systems vs Kairos
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Zuul Systems
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.
- Send digital guest passes
- Reduce gate wait times
- Improve community security
- Guest pass requests
- Contact integration
- QR code passes
- Add passes to calendar
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The ZUUL Systems app allows registered users with residential access to directly send guests a pass for entry into their gated community. Advanced features allow for a significant reduction in wait time at the gate for guests, as well as improved security measures for residents. Registered guests can request a pass from residents. Create groups, favorites, and import all your contacts directly from your phone. Passes contain your pre-scanned ID, unique QR code, and ability to get directions and add a pass to calendars as a reminder.
Kairos
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.
- Shareable shift calendar
- Real-time duty status
- Customizable shift rotations
- Home screen widgets
- Apple Watch support
- Multiple calendar tracking
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Kairos is a premium shift calendar designed specifically for firefighters, medical professionals, police officers, industrial crews, and the families who support them. If you work a rotating schedule, you know how hard it can be for your spouse, kids, and friends to keep track of when you’re working, when you’re off, and when you'll be home. Kairos is built to keep your family in sync. With a clean, beautiful design, you can manage your complex shift rotation and easily share it. By sending a simple 6-character code, your loved ones can see your live schedule on their own devices. No more texting back and forth about who is on duty next weekend—everyone always knows your status at a glance. Simple Schedule Sharing - Share your calendar with a single code so family and friends always know your schedule in real-time. Track Multiple Calendars - Spouses and loved ones can easily switch between their own schedule and any shared schedules. At-a-Glance Status - Instantly see if your loved ones are working, off duty, on call, or on vacation. Shift Countdown - View exactly when a shift ends or when the next one begins. Home Screen Widgets - See duty status right from your phone's Home Screen without even opening the app. Apple Watch Support - Check current shift status, calendar, and count down the hours directly from your wrist. READY FOR ANY ROTATION Set up your calendar in seconds using common pre-set schedules (like Kelly, Panama, DuPont, 24/48, 48/96) or easily build your own custom weekly layout. Keep your family connected and take the guesswork out of shift work with Kairos! Subscriptions & Terms: Kairos Pro is available as an auto-renewable subscription: • Kairos Pro Monthly: $4.99 / month (1 month duration) • Kairos Pro Yearly: $49.99 / year (1 year duration) Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://kairosapp.dev/privacy
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Zuul Systems | Kairos |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (35 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 68.0% of reviews | — |
| Number of ratings | 35 — better | 3 |
| Update frequency | Weekly — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.6 — better | 26.5 |
| Further details — not scored | ||
| Size | 52 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | ZUUL SYSTEMS, LLC | BOAZ TIMOTHY WHEALY |
Customer experience
Zuul Systems
Kairos
In-app purchases
Zuul Systems
No in-app purchases
Kairos
- Kairos Pro - Monthly$4.991 Month
- Kairos Pro - Yearly$49.991 Year









