Comparison

CITIZEN Eco vs Dr. Loop

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

Head to head
About

CITIZEN Eco

This app connects your smartphone to compatible watches, allowing you to sync time, set alarms, and receive notifications for calls and messages. It also features world time settings and a light level indicator for the watch's power source.

Highlights
  • Automatic time synchronization
  • World time settings
  • Call and message notifications
  • Customizable alarms
  • Light level indicator
  • Smartphone search function
  • Link loss alerts
Features
Read full description

*Important Notice Thank you for using Citizen products. As of 12/31/2027, we will no longer provide service for dedicated apps for some models and functions used in conjunction with the apps. For details, see this link. https://www.citizenwatch-global.com/support/im/smartwatch.html Overview This is the official app for linking your smartphone with CITIZEN Bluetooth® watches. The app, which works with iPhone, enables you to set the time and the alarm for your watch, and to receive alerts for incoming calls, mails and texts. With the CITIZEN Bluetooth Watch, you get to enjoy an exquisite analogue watch that tells the accurate time wherever you are plus the great convenience of a smartphone link. CITIZEN Bluetooth features CITIZEN’s proprietary light-powered technology Eco-Drive. Eco-Drive eliminates the need to replace batteries or recharge via cable. Features 1. Time Sync Get the right time, all the time. When you connect with your smartphone, the time on your watch automatically updates to the current time (smartphone time). 2. World Time Get the time in any city around the world. Just touch the world map inside the app to set your watch to the locations time (world time). 3. Call Notification Find out when you get a call. The watch emits a sound or rotates the hands to let you know when you get a call. A filter function enables you to specify which callers will trigger alerts. 4. Message Notification Find out when you get a mail, text or SNS notification. The watch emits a sound or rotates the hands to let you know when a new e-mail or SNS notification has arrived. You can also select the apps for which you wish to receive notification alerts. 5. Alarm Set your alarm from your smartphone. You can set up to 3 alarms at one time. By setting your watch alarm using the smartphone app. The alarm can be set for different times and/or different days of the week. 6. Light Level Indicator See how much light—and power—your dial is getting. Find out how much power your watch is generating by tracking the light it’s exposed to on a daily, weekly or monthly basis. This unique function reflects CITIZEN’s status as a pioneer of light-powered technology. 7. Smartphone Search Find your smartphone easily. Misplaced your smartphone? Not a problem. Use your watch to locate your phone by having it emit a sound to indicate its whereabouts. (Range limitations apply.) 8. Link Loss Alert Get alerted when you’ve forgotten your smartphone somewhere. The watch emits a sound or rotates the hands to let you know when the link between your smartphone and your watch is broken. This app requires iOS 11.2 or later. Notifications have the options of 15 different original sounds, exclusively prepared for the W410 mode About Eco-Drive: Eco-Drive is a CITIZEN proprietary light-powered technology which eliminates the need for replacing batteries. Eco-Drive generates power from any kind of light—from sunlight to dim light—to drive the watch, and stores the surplus on a rechargeable cell. On a single full charge it can run for up to six months in total darkness*. For more details, click here. http://www.citizenwatch-global.com/technologies/index.html#eco-drive * Some models run for less than six months.

About

Dr. Loop

Features
Read full description

La misión de Dr. Loop es ayudar a establecer vínculos entre pacientes con profesionales de la salud y hacer de este mundo un lugar más saludable. En resumen, construir un mundo en el que todos nos sintamos con mayor bienestar físico y mental. Nuestra comunidad se basa en la confianza.

Screenshots

CITIZEN Eco4 screens
Dr. Loop4 screens

Verdict

The call

The clearest difference is iOS requirement: Dr. Loop at 13.0 against CITIZEN Eco's 15.6. 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

CITIZEN Eco ships an update every 5 months, Dr. Loop every 6 months. The most recent releases landed on September 25, 2026 and October 15, 2026 respectively.

Scorecard1 real difference · 7 level
CITIZEN Eco versus Dr. Loop: the parameters behind the verdict, then further details
ParameterCITIZEN EcoDr. Loop
PriceFreeFree
Positive reviews0.0% of reviews—
Update frequencyEvery 5 months — betterEvery 6 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.613.0 — better
Further details — not scored
Size67 MB77 MB
Age rating4+4+
DeveloperCITIZEN WATCH CO.,LTDSatori Tech S.A. de C.V.

In-app purchases

None

CITIZEN Eco

No in-app purchases

None

Dr. Loop

No in-app purchases

Questions

Is CITIZEN Eco free?
CITIZEN Eco is free to download, with no in-app purchases.
Is Dr. Loop free?
Dr. Loop is free to download, with no in-app purchases.
Do CITIZEN Eco or Dr. Loop have ads?
Neither CITIZEN Eco nor Dr. Loop shows ads.
Which is updated more often, CITIZEN Eco or Dr. Loop?
CITIZEN Eco ships an update every 5 months, and Dr. Loop every 6 months. Most recently, CITIZEN Eco was updated on September 25, 2026 and Dr. Loop on October 15, 2026.

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