Comparison

CDOUBLES vs MerryIoT for Amazon Sidewalk

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

Head to head

MerryIoT for Amazon Sidewalk

Free

🔧 Utilities

No 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 for Amazon Sidewalk

Features

Read full description

MerryIoT provides a complete solution for your home and asset monitoring that helps increase a level of security and safety to your property and loved ones. With the help of Amazon Sidewalk, all MerryIoT smart devices stay connected and continue to work over longer distances. A nearby Amazon Sidewalk gateway will pick up messages from the connected MerryIoT device and route them to the MerryIoT application via an integrated AWS cloud with multiple layers of data encryption for customer privacy protection. Today, Amazon Sidewalk include many Echo devices and select Ring devices that securely connect Sidewalk-enabled endpoints to the Amazon Sidewalk network and provide services to you and your neighbors.

Screenshots

CDOUBLES4 screens

MerryIoT for Amazon Sidewalk4 screens

Verdict

The call

The clearest difference is update cadence: MerryIoT for Amazon Sidewalk at every 3 weeks against CDOUBLES's every 4 months. CDOUBLES's advantage is iOS requirement (7.0 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

CDOUBLES ships an update every 4 months, MerryIoT for Amazon Sidewalk every 3 weeks. The most recent releases landed on September 6, 2026 and September 8, 2026 respectively.

Scorecard2 real differences · 4 level

CDOUBLES versus MerryIoT for Amazon Sidewalk: the parameters behind the verdict, then further details
Parameter	CDOUBLES	MerryIoT for Amazon Sidewalk
Price	Free	Free
Update frequency	Every 4 months	Every 3 weeks — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	7.0 — better	13.0
Further details — not scored
Size	32 MB	34 MB
Age rating	4+	4+
Developer	CHUNG YI HUNG	BROWAN COMMUNICATIONS INCORPORATION

In-app purchases

None

CDOUBLES

No in-app purchases

None

MerryIoT for Amazon Sidewalk

No in-app purchases

Questions

Is CDOUBLES free?

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

Is MerryIoT for Amazon Sidewalk free?

MerryIoT for Amazon Sidewalk is free to download, with no in-app purchases.

Do CDOUBLES or MerryIoT for Amazon Sidewalk have ads?

Neither CDOUBLES nor MerryIoT for Amazon Sidewalk shows ads.

Which is updated more often, CDOUBLES or MerryIoT for Amazon Sidewalk?

CDOUBLES ships an update every 4 months, and MerryIoT for Amazon Sidewalk every 3 weeks. Most recently, CDOUBLES was updated on September 6, 2026 and MerryIoT for Amazon Sidewalk on September 8, 2026.