# iAlignTest vs Sealing Materials Selector

The clearest difference is update cadence: Sealing Materials Selector at every 11 months against iAlignTest's every 32 months. On price, ads, in-app purchases and device support there is nothing between them.

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

iAlignTest ships an update every 32 months, Sealing Materials Selector every 11 months. The most recent releases landed on September 22, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | iAlignTest | Sealing Materials Selector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sealing-materials-selector/id1128647369/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Every 11 months** |
| Monetization | — | Free |
| Size | 8 MB | 15 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Motionics LLC](https://appshunter.io/developer/424498959) | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) |

## What reviewers say

### iAlignTest

[App page](https://appshunter.io/ios/app/ialigntest/id535606893)

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is iAlignTest free?

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

### Is Sealing Materials Selector free?

Sealing Materials Selector is free to download, with no in-app purchases.

### Do iAlignTest or Sealing Materials Selector have ads?

Neither iAlignTest nor Sealing Materials Selector shows ads.

### Which is updated more often, iAlignTest or Sealing Materials Selector?

iAlignTest ships an update every 32 months, and Sealing Materials Selector every 11 months. Most recently, iAlignTest was updated on September 22, 2026 and Sealing Materials Selector on June 4, 2026.

---

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