Shim Selector vs Fokker Services
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Shim Selector
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.
- 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
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Noise, vibration and harshness (NVH) problems with brakes? This is the leading tool for engineers to find the best Shim materials for the job. Tap into Trelleborg’s expertise and wide range of top quality materials. Offering more than just a recording function, the app includes an FFT (Fast Fourier Transform) analyzer for an accurate and precise result, showing peak levels (dB) across frequency (Hz). An advanced search function allows for easy filtering for the type of adhesive used, steel quality and thickness and other variables. Requesting one of the short listed materials for a dynamometer test is so easy, using the built in form. Brake engineers rely on this tool, so should you.
Fokker Services
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.
- Real-time stock availability
- Search by part number
- Interchangeable parts search
- View ship-to addresses
- Generate RFQ lists
- Email RFQs
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Spares In Stock Checker app by Fokker Services B.V. for iPod Touch; iPhone; iPad This app provides you with a direct and actual view on the available parts in stock within the warehouse facilities of Fokker Services worldwide. Stock includes spare parts for various aircraft types including Airbus, ATR, Boeing, Bombardier, F-16, Fokker and NH90. Our component repair capabilities and ship-to addresses will also be presented but only if relevant for the part searched for. While online: * the stock information is provided to you real-time per Part Number search. * Interchangeable parts in stock are also presented Functionalities and information provided includes: * Part Number entry to find available stock * Part Number entry auto-complete service starting at 3 characters. * Part Number and Keyword * Quantity in Stock per location: * AMS: Amsterdam, the Netherlands * ATL: Atlanta, USA * SIN: Singapore * Find Interchangeable Alternatives in stock * Setup to enter your contact details * Generate a parts list for Request for Quote (RFQ) * Send RFQ by e-mail to Fokker Services * Ship-to addresses per component repair capability * Request for instant spares and component repair order status updates by e-mail Note: Availability is subject to prior sales
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Shim Selector | Fokker Services |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (5 ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 5 — better | 1 |
| Update frequency | Every 7 months — better | Every 12 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 16.6 | 15.6 — better |
| Further details — not scored | ||
| Size | 15 MB | 94 MB |
| Age rating | 4+ | 4+ |
| Developer | Trelleborg Sealing Solutions | Fokker Services B.V. |
Customer experience
Shim Selector
Fokker Services
In-app purchases
Shim Selector
No in-app purchases
Fokker Services
No in-app purchases
