# Carrier® SMART Service vs Vertical Shaft Alignment

The clearest difference is rating: Vertical Shaft Alignment at 5.0 against Carrier® SMART Service's 3.9. Vertical Shaft Alignment also leads on iOS requirement (13.0 vs 15.1). Carrier® SMART Service's advantage is update cadence (every 2 months vs every 6 months) and ratings volume (7 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.

Vertical Shaft Alignment holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Carrier® SMART Service has 7 ratings behind it against 1, so its average is the more settled of the two.

Carrier® SMART Service ships an update every 2 months, Vertical Shaft Alignment every 6 months. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Carrier® SMART Service | Vertical Shaft Alignment |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (7 ratings)](https://appshunter.io/ios/app/carrier-smart-service/id1270583291/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/vertical-shaft-alignment/id1499478849/reviews)** |
| Number of ratings | **7** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Free | Free |
| Size | 116 MB | 94 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carrier Corporation](https://appshunter.io/developer/542004889) | [ACOEM Group](https://appshunter.io/developer/1495816959) |

## What reviewers say

### Carrier® SMART Service

[App page](https://appshunter.io/ios/app/carrier-smart-service/id1270583291)

This app provides insights into chiller and HVAC unit operations, helping building managers make informed decisions about maintenance, repair, and financial performance. It allows customers to view operating trends and chiller serial numbers for enhanced equipment management.

**Highlights:** Chiller and system operating trend analysis, Informed decision-making for comfort and performance, Integration into preventive and predictive maintenance programs, View chiller serial numbers, Access HVAC unit trends

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Vertical Shaft Alignment

[App page](https://appshunter.io/ios/app/vertical-shaft-alignment/id1499478849)

This app guides users through the vertical shaft alignment process for motor and pump applications using specific Bluetooth-connected sensors. It facilitates measurement and alignment, and allows for instant PDF report generation on-site.

**Highlights:** Bluetooth sensor connectivity, Guided measurement and alignment process, Icon-based adaptive user interface, Instant PDF report generation, Works with RT-300/AT-200 sensors

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Carrier® SMART Service free?

Carrier® SMART Service is free to download, with no in-app purchases.

### Is Vertical Shaft Alignment free?

Vertical Shaft Alignment is free to download, with no in-app purchases.

### Which has better reviews, Carrier® SMART Service or Vertical Shaft Alignment?

Vertical Shaft Alignment is rated higher. Carrier® SMART Service averages 3.9 out of 5 from 7 ratings, while Vertical Shaft Alignment averages 5.0 from 1 ratings.

### Do Carrier® SMART Service or Vertical Shaft Alignment have ads?

Neither Carrier® SMART Service nor Vertical Shaft Alignment shows ads.

### Which is updated more often, Carrier® SMART Service or Vertical Shaft Alignment?

Carrier® SMART Service ships an update every 2 months, and Vertical Shaft Alignment every 6 months. Most recently, Carrier® SMART Service was updated on November 4, 2026 and Vertical Shaft Alignment 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.*