Comparison

Kidde vs Serendipity Sanctuary

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Kidde

Monitor your home's safety with real-time alerts for smoke, CO, and water leaks. This app integrates with smart devices, offering advanced indoor air quality insights and notifications for device maintenance.

Highlights
  • Real-time alarm notifications
  • Smart Hush® functionality
  • QR code setup
  • Device replacement alerts
  • Advanced Mold Risk Analysis
  • Thermal Comfort readings
  • Weekly air quality reports
Features
Read full description

Step into the future with Kidde Smart Home Safety – where the intelligence of modern homes meets cutting-edge protection. The Kidde app seamlessly integrates with your smart home safety devices, delivering real-time alerts, Smart Hush® functionality, and more, all at your fingertips. Explore the Tech-Savvy Features: - Receive instant alarm notifications for smoke, carbon monoxide, indoor air quality issues, or water leaks. - Effortlessly set up alarms by scanning the QR code on the product, connected to your home Wi-Fi 2.4GHz network. - Easily test your alarm's functionality when you are at home. - Stay informed with notifications for device replacements. - Notify friends and family if hazards are detected when you're away. Unlock Advanced Home Health - Elevate Your IAQ Experience: Introducing Advanced Home Health, an exclusive indoor air quality subscription that seamlessly integrates premium features into your IAQ devices. Immerse yourself in the futuristic experience of our revamped IAQ dashboard, featuring a sleek design and a cutting-edge interface designed for tech-savvy subscribers. Subscription perks include: - Advanced Mold Risk Analysis - Thermal Comfort readings - Weekly air quality reports covering temperature, humidity, TVOC, Mold Risk, and Thermal Comfort. - Enjoy a 10% discount on ShopKidde.com. Discover Smart Devices: - Smoke + Carbon Monoxide Alarm with smart features – Double the detection for enhanced safety. - Smoke + Carbon Monoxide Alarm with Indoor Air Quality Monitor – An industry first, combining smoke and CO detection with IAQ monitoring. - Carbon Monoxide Alarm with Indoor Air Quality Monitor – Easy plug-in operation for reliable detection. - Water Leak + Freeze Detector – Early detection to prevent damage. - RemoteLync Camera (Sunsetting on January 7, 2024) – A cordless, Wi-Fi-enabled security camera capturing clips and providing alerts. Embrace the future of home safety with Kidde Smart Home Protection – where technology meets peace of mind. Terms of Use: https://help.kidde.com/hc/en/6-kidde/faq/589-terms-of-service/?l=en

About

Serendipity Sanctuary

This app offers a personalized space for intentional living, self-discovery, and daily reflection. It combines daily rituals, cosmic insights, and mindful moments to help users reconnect with themselves and create space for what matters.

Highlights
  • Personalized daily guidance
  • Cosmic profile with astrological insights
  • Mindful moments for reflection
  • Lunar-inspired guidance
  • Customizable daily practice
  • Intentional living tools
Features
Read full description

YOUR SANCTUARY STARTS HERE. Serendipity Sanctuary is a personalized space for intentional living, self-discovery, and everyday reflection. Created for those who want to move through life with greater awareness, Serendipity brings your daily rituals, cosmic insights, and mindful moments together in one beautiful experience. YOUR DAY, YOUR WAY Begin each day with a personalized experience designed to help you reconnect with yourself. Explore daily guidance, thoughtful prompts, and intentional moments that encourage you to create space for what matters. EXPLORE YOUR COSMIC PROFILE Discover your Sun sign and explore personalized astrological insights based on your birth details. Your cosmic profile offers another way to reflect on your personality, patterns, and personal journey. MAKE SPACE TO BE STILL Step away from the noise and reconnect with the present through mindful moments and reflection. FOLLOW THE MOON Explore lunar-inspired guidance and bring the rhythm of the moon into your personal rituals. CREATE YOUR OWN DAILY PRACTICE Serendipity is designed to fit into your life, not the other way around. Whether you have five minutes or an entire morning, your sanctuary is here whenever you need it. A NOTE ON ASTROLOGY Astrological content is provided for personal reflection and entertainment. It is not a substitute for professional medical, financial, or mental health advice. YOUR JOURNEY IS YOURS. Welcome to Serendipity Sanctuary. Created by Manifest Station ATX. SUBSCRIPTIONS Monthly membership: $9.99 USD per month. Annual membership: $89.99 USD per year. Eligible new subscribers may receive a 7-day free trial; afterward the selected plan renews at $9.99/month or $89.99/year. Prices are localized by the App Store. Subscriptions automatically renew unless canceled at least 24 hours before the current period ends. Manage or cancel subscriptions in your Apple account settings. Restore Purchases is available in Settings > Membership. Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.serendipitysanctuary.com/privacy

Screenshots

Kidde4 screens
Serendipity Sanctuary4 screens

Verdict

The call

The clearest difference is review sentiment: Serendipity Sanctuary at 100% against Kidde's 45%. Serendipity Sanctuary also leads on update cadence (every 6 days vs every 2 months) and rating (5.0 vs 4.7). Kidde's advantage is ratings volume (7.1K vs 3) and device support (3 vs 1). On price, ads, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Kidde sells 2 in-app purchases, starting at $1.99 per month and Serendipity Sanctuary sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Serendipity Sanctuary holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Kidde has 7.1K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 45% of Kidde's written reviews are positive against 100% of Serendipity Sanctuary's.

UpkeepUpdate frequency

Kidde ships an update every 2 months, Serendipity Sanctuary every 6 days. The most recent releases landed on November 11, 2026 and November 6, 2026 respectively.

Scorecard6 real differences · 4 level
Kidde versus Serendipity Sanctuary: the parameters behind the verdict, then further details
ParameterKiddeSerendipity Sanctuary
PriceFreeFree
Rating4.7 (7.1K ratings)5.0 (3 ratings) — better
Positive reviews44.6% of reviews100.0% of reviews — better
Number of ratings7.1K — better3
Update frequencyEvery 2 monthsEvery 6 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS14.0 — better16.4
Further details — not scored
Size88 MB50 MB
Age rating4+4+
DeveloperWalter Kidde Portable EquipmentChristina Ante Woodson

Customer experience

Kidde

All ratings7,017 ratings
Positive95.1%
Neutral1.7%
Negative3.2%
Written reviews222 reviews
Positive44.6%
Neutral9.0%
Negative46.4%

Serendipity Sanctuary

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Kidde

Reported bugs

5 issues
  • App unable to connect to devices
  • Firmware updates failing
  • Devices going offline randomly
  • Notifications not working as expected
  • Inconsistent device naming in app

Requested features

5 requests
  • Add HomeKit support
  • Improve historical data tracking
  • Provide more detailed temperature/air quality data
  • Allow remote alarm silencing
  • Enhance app stability and usability

Serendipity Sanctuary

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Kidde

Subscriptions2
  • Advanced Home Health - Monthly1 Month trial$1.991 Month
  • Advanced Home Health - Annual1 Month trial$19.991 Year
2 purchases

Serendipity Sanctuary

Subscriptions2
  • Serendipity Sanctuary Monthly7 Days trial$9.991 Month
  • Serendipity Sanctuary Annual7 Days trial$89.991 Year

Questions

Is Kidde free?
Kidde is free to download, with in-app purchases available.
Is Serendipity Sanctuary free?
Serendipity Sanctuary is free to download, with in-app purchases available.
Which has better reviews, Kidde or Serendipity Sanctuary?
Serendipity Sanctuary is rated higher. Kidde averages 4.7 out of 5 from 7.1K ratings, while Serendipity Sanctuary averages 5.0 from 3 ratings.
Do Kidde or Serendipity Sanctuary have ads?
Neither Kidde nor Serendipity Sanctuary shows ads.
Which is updated more often, Kidde or Serendipity Sanctuary?
Kidde ships an update every 2 months, and Serendipity Sanctuary every 6 days. Most recently, Kidde was updated on November 11, 2026 and Serendipity Sanctuary on November 6, 2026.

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