# Shim Selector vs Trelleborg Inspection Tool

The clearest difference is iOS requirement: Trelleborg Inspection Tool at 13.0 against Shim Selector's 16.6. 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.

Shim Selector ships an update every 7 months, Trelleborg Inspection Tool every 4 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Shim Selector | Trelleborg Inspection Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/shim-selector/id718147152/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 15 MB | 9 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [Trelleborg AB](https://appshunter.io/developer/423282462) |

## What reviewers say

### Shim Selector

[App page](https://appshunter.io/ios/app/shim-selector/id718147152)

This tool helps engineers find optimal shim materials for brake NVH issues. It features an FFT analyzer for precise results and an advanced search to filter materials by various properties. Users can easily request material samples for testing.

**Highlights:** FFT analyzer for peak dB and frequency, Advanced search and filtering, Material selection based on adhesive, steel, and thickness, Request dynamometer test samples, Access to Trelleborg's material expertise

**Features:** macOS Compatibility

**In-app purchases:** none


### Trelleborg Inspection Tool

[App page](https://appshunter.io/ios/app/trelleborg-inspection-tool/id1529994193)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Shim Selector free?

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

### Is Trelleborg Inspection Tool free?

Trelleborg Inspection Tool is free to download, with no in-app purchases.

### Do Shim Selector or Trelleborg Inspection Tool have ads?

Neither Shim Selector nor Trelleborg Inspection Tool shows ads.

### Which is updated more often, Shim Selector or Trelleborg Inspection Tool?

Shim Selector ships an update every 7 months, and Trelleborg Inspection Tool every 4 months. Most recently, Shim Selector was updated on October 24, 2026 and Trelleborg Inspection Tool on October 27, 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.*