# Belimo RetroFIT+ vs Navien

The clearest difference is rating: Belimo RetroFIT+ at 5.0 against Navien's 2.6. Navien's advantage is update cadence (monthly vs every 7 months) and ratings volume (33 vs 1). 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.

Belimo RetroFIT+ holds the better App Store score, 5.0 against 2.6. That said, the two scores are not equally well evidenced: Navien has 33 ratings behind it against 1, so its average is the more settled of the two.

Belimo RetroFIT+ ships an update every 7 months, Navien monthly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Belimo RetroFIT+ | Navien |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/belimo-retrofit-plus/id1149281299/reviews)** | [2.6 (33 ratings)](https://appshunter.io/ios/app/navien/id1589126852/reviews) |
| Number of ratings | 1 | **33** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Monthly** |
| Monetization | Free | Free |
| Size | 7 MB | 29 MB |
| Requires iOS | 15.5 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BELIMO Automation AG](https://appshunter.io/developer/1149281298) | [Navien](https://appshunter.io/developer/1327385996) |

## What reviewers say

### Belimo RetroFIT+

[App page](https://appshunter.io/ios/app/belimo-retrofit-plus/id1149281299)

Easily find the perfect HVAC replacement actuator for your old or damaged equipment. This app helps you identify the best fitting Belimo product for air or water applications, including globe and rotary valve actuators. It also integrates the complete sensor range and offers project planning tools.

**Highlights:** HVAC replacement actuator finder, Air and water solution identification, Globe and rotary valve actuator selection, Integrated sensor range, OCR function for character recognition, RetroFIT+ project creation and planning

**Features:** Vision Pro support

**In-app purchases:** none


### Navien

[App page](https://appshunter.io/ios/app/navien/id1589126852)

This app provides information on the latest innovations and allows users to log installation and service details for their units. Professionals can access live chat support and register installations, while owners can manage warranties and find local services.

**Highlights:** Log installation and service information, Live chat with support teams, Scan serial numbers for registration, Take job site photos, Search for wholesalers and training, Register units for warranty, Find local installers and service professionals

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Belimo RetroFIT+ free?

Belimo RetroFIT+ is free to download, with no in-app purchases.

### Is Navien free?

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

### Which has better reviews, Belimo RetroFIT+ or Navien?

Belimo RetroFIT+ is rated higher. Belimo RetroFIT+ averages 5.0 out of 5 from 1 ratings, while Navien averages 2.6 from 33 ratings.

### Do Belimo RetroFIT+ or Navien have ads?

Neither Belimo RetroFIT+ nor Navien shows ads.

### Which is updated more often, Belimo RetroFIT+ or Navien?

Belimo RetroFIT+ ships an update every 7 months, and Navien monthly. Most recently, Belimo RetroFIT+ was updated on November 2, 2026 and Navien on November 3, 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.*