# ZETLIGHT SYSTEM vs FluvalSmart

The clearest difference is rating: ZETLIGHT SYSTEM at 4.3 against FluvalSmart's 2.5. FluvalSmart's advantage is ratings volume (540 vs 3). On price, review sentiment, update cadence and ads there is nothing between them.

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

ZETLIGHT SYSTEM holds the better App Store score, 4.3 against 2.5. That said, the two scores are not equally well evidenced: FluvalSmart has 540 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 29% of ZETLIGHT SYSTEM's written reviews are positive against 27% of FluvalSmart's.

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | ZETLIGHT SYSTEM | FluvalSmart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/zetlight-system/id1052640173/reviews)** | [2.5 (540 ratings)](https://appshunter.io/ios/app/fluvalsmart/id1179249357/reviews) |
| Number of ratings | 3 | **540** |
| Positive reviews | **28.6% of reviews** | 27.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 22 MB | 12 MB |
| Requires iOS | 9.0 | 9.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zetlight Group](https://appshunter.io/developer/1156386420) | [Rolf C Hagen Inc.](https://appshunter.io/developer/1321403702) |

## What reviewers say

### ZETLIGHT SYSTEM

[App page](https://appshunter.io/ios/app/zetlight-system/id1052640173)

Control Zetlight LED aquarium lighting devices remotely. Manage multiple lights, adjust effects like dawn and lunar phases, and simulate weather patterns. Offers basic and expert control platforms for aquarium hobbyists.

**Highlights:** Control Zetlight LED lighting devices, Wireless network control, Manage multiple lightings, Basic and Expert control platforms, Adjust light effects (dawn, sunrise, daytime, sunset, nighttime), Simulate weather and lunar phases, Acclimation mode for new tank inhabitants

**In-app purchases:** none


### FluvalSmart

[App page](https://appshunter.io/ios/app/fluvalsmart/id1179249357)

Control Fluval Bluetooth LED aquarium lights with your iOS device. Adjust colors, create custom lighting schedules, and simulate dynamic effects like cloud cover and storms. Compatible with various Fluval LED models.

**Highlights:** BLE 4.0 control, Manual, Auto, Pro modes, Independent color channel control, Preset lighting configurations, Dynamic lighting effects

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- ⭐ Great light
- 🌟 Customizable lighting
- 💡 Helpful app features
- 👍 Easy to use

**What reviewers complain about**

- 🐛 Buggy app
- 🤯 Confusing UI
- 🕰️ Difficult to set precise times
- 🔌 Unreliable Bluetooth connection

**Reported bugs**

- App crashes during firmware updates
- Saved settings get reset unexpectedly
- Bluetooth connection issues after power cycles

**Requested features**

- Add ability to turn lights off completely at night
- Allow more customization of sunrise/sunset colors
- Implement weekly scheduling options
- Improve app stability and responsiveness


## Frequently asked questions

### Is ZETLIGHT SYSTEM free?

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

### Is FluvalSmart free?

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

### Which has better reviews, ZETLIGHT SYSTEM or FluvalSmart?

ZETLIGHT SYSTEM is rated higher. ZETLIGHT SYSTEM averages 4.3 out of 5 from 3 ratings, while FluvalSmart averages 2.5 from 540 ratings.

### Do ZETLIGHT SYSTEM or FluvalSmart have ads?

Neither ZETLIGHT SYSTEM nor FluvalSmart shows ads.

### Which is updated more often, ZETLIGHT SYSTEM or FluvalSmart?

ZETLIGHT SYSTEM ships an update every 2 months, and FluvalSmart every 2 months. Most recently, ZETLIGHT SYSTEM was updated on October 24, 2026 and FluvalSmart on October 24, 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.*