# Shim Selector vs Fokker Services

The clearest difference is rating: Shim Selector at 4.8 against Fokker Services's 4.0. Shim Selector also leads on ratings volume (5 vs 1). On price, review sentiment, update cadence and ads 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 holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Shim Selector has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Shim Selector ships an update every 7 months, Fokker Services every 12 months. The most recent releases landed on June 4, 2026 and June 7, 2026 respectively.

## The numbers

| Metric | Shim Selector | Fokker Services |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/shim-selector/id718147152/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/fokker-services/id786218596/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 12 months |
| Monetization | Free | Free |
| Size | 15 MB | 94 MB |
| Requires iOS | 16.6 | **15.6** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [Fokker Services B.V.](https://appshunter.io/developer/786218599) |

## 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


### Fokker Services

[App page](https://appshunter.io/ios/app/fokker-services/id786218596)

Access real-time inventory of aircraft spare parts from Fokker Services worldwide. Search by part number to find available stock, interchangeable alternatives, and ship-to addresses for component repairs. Generate and send RFQs directly through the app.

**Highlights:** Real-time stock availability, Search by part number, Interchangeable parts search, View ship-to addresses, Generate RFQ lists, Email RFQs

**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 Fokker Services free?

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

### Which has better reviews, Shim Selector or Fokker Services?

Shim Selector is rated higher. Shim Selector averages 4.8 out of 5 from 5 ratings, while Fokker Services averages 4.0 from 1 ratings.

### Do Shim Selector or Fokker Services have ads?

Neither Shim Selector nor Fokker Services shows ads.

### Which is updated more often, Shim Selector or Fokker Services?

Shim Selector ships an update every 7 months, and Fokker Services every 12 months. Most recently, Shim Selector was updated on June 4, 2026 and Fokker Services on June 7, 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.*