Comparison

Door Alert vs Castify

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

Head to head
About

Door Alert

This utility app acts as a simple security monitor for your smartphone. It detects unauthorized door entries or exits and notifies you immediately. It's designed to offer an extra layer of security for families with young children.

Highlights
  • Unauthorized exit/entry detection
  • Immediate audible alarm
  • Optional silent email/SMS alerts
  • Works with or without cellular
  • Low battery usage
Features
Read full description

Introducing Door Alert, an easy-to-use security solution for smartphones! Monitors for unauthorized exits or entries, alerting you immediately. Just start the app, place the phone against the door, and it’s ready! Visit DoorAlertApp.com for more ideas and uses. The app uses an audible alarm. Optional features include sending an alert silently through email or SMS gateway. An additional peace of mind for families with young kids. Works with or without a cellular account. Notes: • the app is intended to be an additional security measure, not a replacement to conventional home and travel solutions • silent alerts are sent as-is; while every attempt is made to ensure delivery, there may be situations outside our control which can prevent delivery • when running, battery usage is increased by less than 1% per hour

About

Castify

Features
Read full description

Castify is your ultimate bridge between the small screen and the big screen. Designed for cinema lovers and families, Castify elegantly sniffs out videos from your favorite websites and casts your local memories directly to your Smart TV. - CORE FEATURES: • Universal Casting: Flawlessly supports Roku, Google Chromecast, DLNA TVs (Samsung, LG, Sony, etc.), and gaming consoles. • Subtitles Support (CC): Watching foreign films? Easily attach your own local .srt or .vtt subtitle files to any video stream for perfect syncing on the big screen. • Smart Web Browser (NEW): A fully-featured browser with a customizable homepage, bookmarks, and history. Build your own private media hub! • Local Media Casting: Cast photos and high-res videos directly from your camera roll to the TV instantly with zero lag. • Smart Video Sniffer: Browse the web, tap play, and our intelligent engine will extract the highest quality video stream for your TV. • Ad-Blocker Engine: Enjoy a pure, cinematic web browsing experience without annoying pop-ups. • Premium Remote Control: Control volume, seek seamlessly, and manage playback straight from your phone. - CASTIFY PRO (Premium): Unlock the ultimate viewing experience: Unlimited casting time Unlimited local photos/videos casting 4K Ultra HD casting support Strict Ad-Blocker for all websites Upgrade your living room experience today. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Door Alert4 screens
Castify4 screens

Verdict

The call

The clearest difference is in-app purchases: Door Alert at none against Castify's 4. Castify's advantage is update cadence (every 3 days vs every 33 months). On price, ads, device support and iOS requirement 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. Castify sells 4 in-app purchases, starting at $4.99 per 7 days. Door Alert asks for nothing beyond the download.

UpkeepUpdate frequency

Door Alert ships an update every 33 months, Castify every 3 days. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 8 level
Door Alert versus Castify: the parameters behind the verdict, then further details
ParameterDoor AlertCastify
PriceFreeFree
Rating2.5 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 33 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.014 — better
Further details — not scored
Size5 MB19 MB
Age rating4+17+
DeveloperRussell Harper瑞华 张

In-app purchases

None

Door Alert

No in-app purchases

4 purchases

Castify

Subscriptions3
  • Weekly Premium$4.997 Days
  • Monthly Premium$9.991 Month
  • Yearly Premium3 Days trial$39.991 Year
One-time1
  • Lifetime Premium$69.99

Questions

Is Door Alert free?
Door Alert is free to download, with no in-app purchases.
Is Castify free?
Castify is free to download, with in-app purchases available.
Do Door Alert or Castify have ads?
Neither Door Alert nor Castify shows ads.
Which is updated more often, Door Alert or Castify?
Door Alert ships an update every 33 months, and Castify every 3 days. Most recently, Door Alert was updated on October 10, 2026 and Castify on October 24, 2026.

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