# CITIZEN Eco vs Dr. Loop

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.

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

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.

## The numbers

| Metric | CITIZEN Eco | Dr. Loop |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 6 months |
| Monetization | Free | — |
| Size | 67 MB | 77 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CITIZEN WATCH CO.,LTD](https://appshunter.io/developer/434806605) | [Satori Tech S.A. de C.V.](https://appshunter.io/developer/1091400902) |

## What reviewers say

### CITIZEN Eco

[App page](https://appshunter.io/ios/app/citizen-eco-drive-bluetooth-s/id1268478800)

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:** macOS Compatibility

**In-app purchases:** none


### Dr. Loop

[App page](https://appshunter.io/ios/app/dr-loop/id1544641708)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*