# Shim Selector vs Bai Er Rui

The clearest difference is iOS requirement: Bai Er Rui at 12.0 against Shim Selector's 16.6. 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.

## The numbers

| Metric | Shim Selector | Bai Er Rui |
| --- | --- | --- |
| 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 | — |
| Monetization | Free | — |
| Size | 15 MB | 34 MB |
| Requires iOS | 16.6 | **12.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [Bai Er Rui Trade Co., Limited](https://appshunter.io/developer/1839583888) |

## 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


### Bai Er Rui

[App page](https://appshunter.io/ios/app/bai-er-rui/id6752506468)

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

**In-app purchases:** none


## Frequently asked questions

### Is Shim Selector free?

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

### Is Bai Er Rui free?

Bai Er Rui is free to download, with no in-app purchases.

### Do Shim Selector or Bai Er Rui have ads?

Neither Shim Selector nor Bai Er Rui shows ads.

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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.*