# Sealing Materials Selector vs Vertical Shaft Alignment

The clearest difference is iOS requirement: Vertical Shaft Alignment at 13.0 against Sealing Materials Selector's 15.6. On price, rating, ratings volume and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Sealing Materials Selector against 5.0 for Vertical Shaft Alignment. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Sealing Materials Selector ships an update every 11 months, Vertical Shaft Alignment every 6 months. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Sealing Materials Selector | Vertical Shaft Alignment |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/sealing-materials-selector/id1128647369/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/vertical-shaft-alignment/id1499478849/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 6 months** |
| Monetization | Free | Free |
| Size | 15 MB | 94 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [ACOEM Group](https://appshunter.io/developer/1495816959) |

## What reviewers say

### Sealing Materials Selector

[App page](https://appshunter.io/ios/app/sealing-materials-selector/id1128647369)

Easily find the right sealing materials by entering specifications like temperature and hardness. Filter by chemical compatibility, approvals, or product type for O-Rings, Quad-Rings, and V-Rings. Request material datasheets directly through the app.

**Highlights:** Search by material specifications, Filter by temperature and hardness, Chemical compatibility filtering, Institute approvals filtering, Product type filtering (O-Rings, Quad-Rings, V-Rings), Request material datasheets

**Features:** macOS Compatibility

**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 Sealing Materials Selector free?

Sealing Materials Selector 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, Sealing Materials Selector or Vertical Shaft Alignment?

Sealing Materials Selector and Vertical Shaft Alignment are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Sealing Materials Selector or Vertical Shaft Alignment have ads?

Neither Sealing Materials Selector nor Vertical Shaft Alignment shows ads.

### Which is updated more often, Sealing Materials Selector or Vertical Shaft Alignment?

Sealing Materials Selector ships an update every 11 months, and Vertical Shaft Alignment every 6 months. Most recently, Sealing Materials Selector was updated on October 12, 2026 and Vertical Shaft Alignment on October 14, 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.*