Comparison

KeyBell vs Door 3rd

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

Head to head

KeyBell

Free

🔧 Utilities

★ 1.813 ratingsView app →

About

KeyBell

Monitor your home or office premises remotely with IP cameras. This free application allows for remote configuration and other useful functions to keep your property secure.

Highlights

Remote IP camera monitoring
Home and office premise surveillance
Remote configuration
Security monitoring

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KeyBell enables customers to monitor home / office premises where the IP Camera is installed. This free app offers many other useful functions such as: remote configuration.

About

Door 3rd

Features

Read full description

瑞敏特配套卷闸门、电动门窗等定制化设备进行远程控制手机app。功能说明： 1、对卷闸门、电动门窗等实现远程操作 2、具有账号管理、设备分享等功能 3、定时设置自动开门、关门功能 4、整合了蓝牙、WiFi 和 4G 设备

Screenshots

KeyBell3 screens

Door 3rd3 screens

Verdict

The call

The clearest difference is update cadence: Door 3rd at every 3 weeks against KeyBell's every 5 months. KeyBell's advantage is iOS requirement (9.0 vs 13.0). On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

KeyBell ships an update every 5 months, Door 3rd every 3 weeks. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

Scorecard2 real differences · 8 level

KeyBell versus Door 3rd: the parameters behind the verdict, then further details
Parameter	KeyBell	Door 3rd
Price	Free	Free
Rating	1.8 (13 ratings) — better	—
Positive reviews	20.0% of reviews	—
Number of ratings	13 — better	—
Update frequency	Every 5 months	Every 3 weeks — better
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPod	iPhone, iPod
Requires iOS	9.0 — better	13.0
Further details — not scored
Size	16 MB	30 MB
Age rating	4+	17+
Developer	瑶朱	建宁陈

In-app purchases

None

KeyBell

No in-app purchases

None

Door 3rd

No in-app purchases

Questions

Is KeyBell free?

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

Is Door 3rd free?

Door 3rd is free to download, with no in-app purchases.

Do KeyBell or Door 3rd have ads?

Neither KeyBell nor Door 3rd shows ads.

Which is updated more often, KeyBell or Door 3rd?

KeyBell ships an update every 5 months, and Door 3rd every 3 weeks. Most recently, KeyBell was updated on October 3, 2026 and Door 3rd on October 10, 2026.