# imOS CRX plus vs Smart Reef

The clearest difference is rating: imOS CRX plus at 2.8 against Smart Reef's 1.6. imOS CRX plus also leads on in-app purchases (none vs 11) and review sentiment (17% vs 4%). Smart Reef's advantage is ratings volume (19 vs 6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Smart Reef sells 8 one-off in-app purchases. imOS CRX plus asks for nothing beyond the download.

imOS CRX plus holds the better App Store score, 2.8 against 1.6. Both are backed by a comparable volume of ratings — 6 and 19 respectively. Written reviews point the same way: 17% of imOS CRX plus's written reviews are positive against 4% of Smart Reef's.

imOS CRX plus ships an update every 5 months, Smart Reef every 3 months. The most recent releases landed on June 1, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | imOS CRX plus | Smart Reef |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.8 (6 ratings)](https://appshunter.io/ios/app/imos-crx-plus/id1287312949/reviews)** | [1.6 (19 ratings)](https://appshunter.io/ios/app/smart-reef/id1480355166/reviews) |
| Number of ratings | 6 | **19** |
| Positive reviews | **16.7% of reviews** | 3.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 4 MB |
| Requires iOS | 15.1 | **14.6** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [illumagic](https://appshunter.io/developer/1139644730) | [Reef Factory sp. z o.o.](https://appshunter.io/developer/1367901113) |

## What reviewers say

### imOS CRX plus

[App page](https://appshunter.io/ios/app/imos-crx-plus/id1287312949)

This app allows you to program and control LED lights on compatible devices via Bluetooth. You can define LED intensities at specific time points, choose gradual or instant transitions, and select from various lighting modes to customize your light settings.

**Highlights:** Bluetooth LED control, Program light intensities, Define time points for settings, Gradual or instant transitions, Multiple lighting modes, Customize light settings

**Features:** macOS Compatibility

**In-app purchases:** none


### Smart Reef

[App page](https://appshunter.io/ios/app/smart-reef/id1480355166)

Manage your marine aquarium with this app. It provides device management, alerts for issues, and detailed historical data. A central dashboard offers a clear overview of your aquarium's status and device operations.

**Highlights:** Device management, Aquarium alerts, Measurement history, Operational status dashboard, Planned job journal, Preset sharing

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Warranty 3 years | $12.99 | one-time |
| Warranty 3 years | $17.99 | one-time |
| Warranty 3 years | $19.99 | one-time |
| Warranty 3 years | $24.99 | one-time |
| Warranty 3 years | $29.99 | one-time |
| Warranty 3 years | $34.99 | one-time |
| Warranty 3 years | $39.99 | one-time |
| Warranty 3 years | $49.99 | one-time |


## Frequently asked questions

### Is imOS CRX plus free?

imOS CRX plus is free to download, with no in-app purchases.

### Is Smart Reef free?

Smart Reef is free to download, with in-app purchases available.

### Which has better reviews, imOS CRX plus or Smart Reef?

imOS CRX plus is rated higher. imOS CRX plus averages 2.8 out of 5 from 6 ratings, while Smart Reef averages 1.6 from 19 ratings.

### Do imOS CRX plus or Smart Reef have ads?

Neither imOS CRX plus nor Smart Reef shows ads.

### Which is updated more often, imOS CRX plus or Smart Reef?

imOS CRX plus ships an update every 5 months, and Smart Reef every 3 months. Most recently, imOS CRX plus was updated on June 1, 2026 and Smart Reef on June 11, 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.*