# OCEANUS Connected vs CITIZEN Eco

The clearest difference is review sentiment: OCEANUS Connected at 43% against CITIZEN Eco's 0%. OCEANUS Connected also leads on update cadence (every 2 months vs every 5 months) and iOS requirement (11.0 vs 15.6). On price, ads, in-app purchases and monetization model there is nothing between them.

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

OCEANUS Connected ships an update every 2 months, CITIZEN Eco every 5 months. The most recent releases landed on November 5, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | OCEANUS Connected | CITIZEN Eco |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (120 ratings)](https://appshunter.io/ios/app/oceanus-connected/id1179979492/reviews)** | — |
| Number of ratings | **120** | — |
| Positive reviews | **43.5% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free | Free |
| Size | 222 MB | 67 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CASIO COMPUTER CO., LTD.](https://appshunter.io/developer/456569836) | [CITIZEN WATCH CO.,LTD](https://appshunter.io/developer/434806605) |

## What reviewers say

### OCEANUS Connected

[App page](https://appshunter.io/ios/app/oceanus-connected/id1179979492)

This app connects your Bluetooth-enabled CASIO watch to your iPhone, enabling various Mobile Link functions. It simplifies watch operations and allows data transfer to the new CASIO WATCHES app. Requires iOS 14 or later and 'Always' location service permission.

**Highlights:** Bluetooth watch connectivity, Mobile Link functions, Simplified watch operations, User data transfer, Location services for time accuracy

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is OCEANUS Connected free?

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

### Is CITIZEN Eco free?

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

### Do OCEANUS Connected or CITIZEN Eco have ads?

Neither OCEANUS Connected nor CITIZEN Eco shows ads.

### Which is updated more often, OCEANUS Connected or CITIZEN Eco?

OCEANUS Connected ships an update every 2 months, and CITIZEN Eco every 5 months. Most recently, OCEANUS Connected was updated on November 5, 2026 and CITIZEN Eco on November 4, 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.*