CA4K vs ColBlue
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CA4K
This app provides mobile access control for enterprise entry points like doors and elevators. Users can customize their approved access points and gain entry without physical credentials. It also offers optional administrator functions for system management.
- Mobile access to doors and elevators
- Customize approved entry points
- Log access without physical credentials
- Administrator functions for system management
- Enterprise electronic access control
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CA4K Access MGR APP The CA4K Access App is designed to work with Continental Access CA4K Software v1.1 or higher. The software and its associated hardware provide enterprise electronic access control to doors, elevators and other entry ways. The App allows smart mobile users to customize a list of their approved entry points in the "My Doors" tab and gain logged access to the entry points without having to use a physically supplied credential. Additionally, the App provides some optional CA4K administrator level functions for mobile control and management of the CA4K system. The CA4K Access App is an ideal tool for Schools, Universities, Hospitals, Commercial Buildings, Multi-Tenant Residential Buildings, etc.
ColBlue
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.
- Open doors with phone
- Uses Bluetooth readers
- Secure access
- Fast unlocking
- Replaces access cards
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ColBlue App is a simple, secure way to quickly open doors connected to Millennium Bluetooth readers directly from your phone. Simple to use, fast and secure, ColBlue App is a good replacement for your access cards and keys!
Screenshots
Verdict
The clearest difference is ratings volume: CA4K at 10 against ColBlue's 1. CA4K also leads on iOS requirement (11.0 vs 15.0). ColBlue's advantage is update cadence (every 26 months vs every 54 months). On price, rating, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 1.1 for CA4K against 1.0 for ColBlue. That said, the two scores are not equally well evidenced: CA4K has 10 ratings behind it against 1, so its average is the more settled of the two.
CA4K ships an update every 54 months, ColBlue every 26 months. The most recent releases landed on October 16, 2026 and October 11, 2026 respectively.
| Parameter | CA4K | ColBlue |
|---|---|---|
| Price | Free | Free |
| Rating | 1.1 (10 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 10 — better | 1 |
| Update frequency | Every 54 months | Every 26 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 0 MB | 89 MB |
| Age rating | 4+ | 4+ |
| Developer | NAPCO Security Technologies | Millennium Group Inc. |
Customer experience
CA4K
ColBlue
In-app purchases
CA4K
No in-app purchases
ColBlue
No in-app purchases
