# iAquaLink vs Navien Smart Plus

The clearest difference is rating: iAquaLink at 4.7 against Navien Smart Plus's 3.7. iAquaLink also leads on ratings volume (101K vs 3) and review sentiment (28% vs 13%). Navien Smart Plus's advantage is monetization model (free vs free with in-app purchases). 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.

iAquaLink holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: iAquaLink has 101K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 28% of iAquaLink's written reviews are positive against 13% of Navien Smart Plus's.

iAquaLink ships an update every 2 months, Navien Smart Plus every 5 weeks. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | iAquaLink | Navien Smart Plus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (101K ratings)](https://appshunter.io/ios/app/iaqualink/id443059509/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/navien-smart-plus/id1453634078/reviews) |
| Number of ratings | **101K** | 3 |
| Positive reviews | **28.3% of reviews** | 12.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 41 MB | 37 MB |
| Requires iOS | 13.2 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zodiac Pool Systems, Inc.](https://appshunter.io/developer/443059512) | [KD Navien](https://appshunter.io/developer/456445012) |

## What reviewers say

### iAquaLink

[App page](https://appshunter.io/ios/app/iaqualink/id443059509)

Control and monitor your swimming pool equipment remotely from your mobile device. Adjust settings like pump speed, temperature, and lighting, and automate cleaning schedules. Offers comprehensive management for various pool systems and accessories.

**Highlights:** Remote pool equipment monitoring and control, Schedule and operate pumps, Control pool and spa heating, Automate pool lighting, Manage saltwater chlorinators, On-demand robotic pool cleaner control, Temperature monitoring and adjustment

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to control pool and spa remotely
- 👍 Convenient for monitoring pool status
- 💡 Good integration with Alexa
- 🔒 Reliable connectivity when hardwired

**What reviewers complain about**

- 🐛 Frequent connectivity issues and app crashes
- 👎 Limited functionality in the app compared to web interface
- 💤 Slow response times and laggy performance
- 🤯 Confusing and outdated user interface

**Reported bugs**

- App freezes and loses connection to pool equipment
- Inability to re-add previously connected devices
- Unreliable firmware updates causing issues
- Inconsistent display of pool status and settings

**Requested features**

- Customizable dashboard and one-touch controls
- Notifications for pool events (e.g., robot full, temperature reached)
- Improved scheduling and automation options
- Better integration with smart home platforms


### Navien Smart Plus

[App page](https://appshunter.io/ios/app/navien-smart-plus/id1453634078)

Control your home's heating and hot water remotely. Monitor energy usage, set schedules, and benefit from intelligent features like geofencing and weather-adaptive adjustments. Ensures comfort and efficiency by learning your habits and responding to external conditions.

**Highlights:** Remote heating and hot water control, Energy usage monitoring, Intelligent learning thermostat, Geofencing capabilities, Weather-adaptive adjustments, Multizone control

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 📈 Recent updates improved stability
- 💡 Oil consumption indication useful
- 💡 Cumulative totals and monthly graphs useful
- 💡 App works for remote switching

**What reviewers complain about**

- 🐛 App constantly crashing
- 🐛 App frequently offline
- 🐛 App requires frequent restarts
- 🐛 Scheduling interface difficult
- 🐛 Thermostat has a mind of its own

**Reported bugs**

- App not working since update
- Water heating not being timed
- Energy usage doesn’t work
- Loses info - history
- Glitches so all of a sudden it goes into holiday mode

**Requested features**

- Implement summer time mode
- Add dark mode
- Improve scheduling interface
- Allow duration for boosts
- Show error codes in app


## Frequently asked questions

### Is iAquaLink free?

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

### Is Navien Smart Plus free?

Navien Smart Plus is free to download, with no in-app purchases.

### Which has better reviews, iAquaLink or Navien Smart Plus?

iAquaLink is rated higher. iAquaLink averages 4.7 out of 5 from 101K ratings, while Navien Smart Plus averages 3.7 from 3 ratings.

### Do iAquaLink or Navien Smart Plus have ads?

Neither iAquaLink nor Navien Smart Plus shows ads.

### Which is updated more often, iAquaLink or Navien Smart Plus?

iAquaLink ships an update every 2 months, and Navien Smart Plus every 5 weeks. Most recently, iAquaLink was updated on November 6, 2026 and Navien Smart Plus on November 2, 2026.

---

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