# Apex Fusion vs CertusAlert

The clearest difference is rating: CertusAlert at 5.0 against Apex Fusion's 3.4. CertusAlert also leads on update cadence (every 10 days vs every 2 months). Apex Fusion's advantage is ratings volume (130 vs 1) and iOS requirement (17.6 vs 26.5). 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.

CertusAlert holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: Apex Fusion has 130 ratings behind it against 1, so its average is the more settled of the two.

Apex Fusion ships an update every 2 months, CertusAlert every 10 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Apex Fusion | CertusAlert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (130 ratings)](https://appshunter.io/ios/app/apex-fusion/id1114191823/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/certusalert/id6790866599/reviews)** |
| Number of ratings | **130** | 1 |
| Positive reviews | 41.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | Free | Free |
| Size | 50 MB | 3 MB |
| Requires iOS | **17.6** | 26.5 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Neptune Systems, LLC](https://appshunter.io/developer/470430227) | [Darrell Iehle](https://appshunter.io/developer/6789659622) |

## What reviewers say

### Apex Fusion

[App page](https://appshunter.io/ios/app/apex-fusion/id1114191823)

Remotely monitor and control your aquarium's equipment, including lights, pumps, and heaters. Observe your aquatic environment through connected webcams and receive instant alerts for critical issues. Manage multiple aquariums and log important water parameters and observations.

**Highlights:** Remote aquarium monitoring, Equipment control (lights, pumps, heaters), IP webcam observation, Water parameter logging, Maintenance notes, Remote fish feeding, Multi-aquarium management, Real-time iOS notifications

**Features:** macOS Compatibility, iPhone Duo support

**In-app purchases:** none

**What reviewers like**

- 👍 Works as designed
- 👍 Reliable system operation
- 👍 Great for remote monitoring
- 👍 Good control of parameters
- 👍 Useful for alerts

**What reviewers complain about**

- 🐛 Terrible half-finished products
- 🐛 Not working on iPhone devices
- 🐛 Below average effort
- 🐛 Very hard to use
- 🐛 Needs 21st century update

**Reported bugs**

- Long periods between updates
- UI not modern
- Little problems in AFS and MXM
- Took time to figure out
- Months of troubleshooting

**Requested features**

- Add widget for iOS
- Add widget support
- Add widget for iOS Home Screen
- Add widget dashboard
- Add live activities for parameters


### CertusAlert

[App page](https://appshunter.io/ios/app/certusalert/id6790866599)

Receive real-time, customizable Building Management System (BMS) alarm messages. Prioritize notifications and automatically sort messages into color-coded folders based on keywords.

**Highlights:** Customizable BMS alarm messaging, Real-time notifications, Priority filtering for alerts, Automatic message sorting, Color-coded folders, Keyword-based sorting

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Apex Fusion free?

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

### Is CertusAlert free?

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

### Which has better reviews, Apex Fusion or CertusAlert?

CertusAlert is rated higher. Apex Fusion averages 3.4 out of 5 from 130 ratings, while CertusAlert averages 5.0 from 1 ratings.

### Do Apex Fusion or CertusAlert have ads?

Neither Apex Fusion nor CertusAlert shows ads.

### Which is updated more often, Apex Fusion or CertusAlert?

Apex Fusion ships an update every 2 months, and CertusAlert every 10 days. Most recently, Apex Fusion was updated on November 6, 2026 and CertusAlert on October 31, 2026.

---

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