# Door Alert vs ColBlue

The clearest difference is rating: Door Alert at 2.5 against ColBlue's 1.0. On price, ratings volume, update cadence and ads there is nothing between them.

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

Door Alert holds the better App Store score, 2.5 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Door Alert ships an update every 33 months, ColBlue every 26 months. The most recent releases landed on November 1, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Door Alert | ColBlue |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (2 ratings)](https://appshunter.io/ios/app/door-alert/id1076093852/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/colblue/id1621727466/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 33 months | **Every 26 months** |
| Monetization | Free | Free |
| Size | 5 MB | 89 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Russell Harper](https://appshunter.io/developer/581673732) | [Millennium Group Inc.](https://appshunter.io/developer/1459017133) |

## What reviewers say

### Door Alert

[App page](https://appshunter.io/ios/app/door-alert/id1076093852)

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:** macOS Compatibility

**In-app purchases:** none


### ColBlue

[App page](https://appshunter.io/ios/app/colblue/id1621727466)

This app provides a secure and fast method to unlock doors equipped with specific Bluetooth readers using your smartphone. It serves as a convenient digital replacement for physical access cards and keys.

**Highlights:** Open doors with phone, Uses Bluetooth readers, Secure access, Fast unlocking, Replaces access cards

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Door Alert free?

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

### Is ColBlue free?

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

### Which has better reviews, Door Alert or ColBlue?

Door Alert is rated higher. Door Alert averages 2.5 out of 5 from 2 ratings, while ColBlue averages 1.0 from 1 ratings.

### Do Door Alert or ColBlue have ads?

Neither Door Alert nor ColBlue shows ads.

### Which is updated more often, Door Alert or ColBlue?

Door Alert ships an update every 33 months, and ColBlue every 26 months. Most recently, Door Alert was updated on November 1, 2026 and ColBlue on October 11, 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.*