Comparison

CDOUBLES vs MerryIoT Sensor

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

Head to head

★ 1.02 ratingsView app →

About

CDOUBLES

Features

Read full description

CDOUBLES is compatible with iOS 7.0 and above. It can support live view, remote playback, PTZ control, local playback, snapshot and push notifications etc. from DVR and NVR via 3G or WIFI.

About

MerryIoT Sensor

Monitor your home's environment with this app. It tracks air quality, detects water leaks, and alerts you to unexpected movement, helping ensure a healthy and safe living space.

Highlights

Air quality monitoring
Water leak detection
Movement detection
Home safety alerts
Healthy home environment

Features

Read full description

MerryIoT is the simple way to a healthy and safe home. Download the MerryIoT app and monitor air quality status, water leak detection, unexpected movement, etc…

Screenshots

CDOUBLES4 screens

MerryIoT Sensor4 screens

Verdict

The call

The clearest difference is iOS requirement: CDOUBLES at 7.0 against MerryIoT Sensor's 13.0. On price, update cadence, 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

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

CDOUBLES ships an update every 4 months, MerryIoT Sensor every 5 months. The most recent releases landed on September 6, 2026 and June 1, 2026 respectively.

Scorecard1 real difference · 9 level

CDOUBLES versus MerryIoT Sensor: the parameters behind the verdict, then further details
Parameter	CDOUBLES	MerryIoT Sensor
Price	Free	Free
Rating	—	1.0 (2 ratings) — better
Positive reviews	—	0.0% of reviews
Number of ratings	—	2 — better
Update frequency	Every 4 months — better	Every 5 months
Ads	No	No
In-app purchases	No	No
Monetization	—	Free
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	7.0 — better	13.0
Further details — not scored
Size	32 MB	33 MB
Age rating	4+	4+
Developer	CHUNG YI HUNG	BROWAN COMMUNICATIONS INCORPORATION

In-app purchases

None

CDOUBLES

No in-app purchases

None

MerryIoT Sensor

No in-app purchases

Questions

Is CDOUBLES free?

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

Is MerryIoT Sensor free?

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

Do CDOUBLES or MerryIoT Sensor have ads?

Neither CDOUBLES nor MerryIoT Sensor shows ads.

Which is updated more often, CDOUBLES or MerryIoT Sensor?

CDOUBLES ships an update every 4 months, and MerryIoT Sensor every 5 months. Most recently, CDOUBLES was updated on September 6, 2026 and MerryIoT Sensor on June 1, 2026.