FSA System vs Bike Sizer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FSA System
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Introducing the FSA System APP for FSA ebike owners! With this app, you can easily update your ebike's firmware and access diagnostic data to ensure that your ebike is running at its best. Features include: Firmware updates: Keep your ebike up to date with the latest software to ensure optimal performance, you will be able to update each components of your system and your APP will guide through the process. Diagnostic data: View detailed information about your ebike's FSA System: thanks to status parameter, warning and error messages you will be able to trouble shoot any issues that may arise. Whether you're an experienced ebike rider or new to the world of electric bikes, the FSA System APP makes it easy to get the most out of your FSA ebike. Download it today and start enjoying a smoother, more reliable ride!
Bike Sizer
Find your ideal bicycle or optimize your current setup with AI-powered recommendations. Access a comprehensive bike database and generate detailed, exportable reports to improve your cycling performance.
- AI-driven bike sizing
- Extensive bike database
- Positioning enhancement
- PDF-exportable reports
- Cycling practice optimization
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Discover Bike Sizer, the ultimate app for cycling enthusiasts. With AI-driven algorithms, find the perfect bike or enhance your positioning. Explore an extensive database of recommended bikes and generate detailed, PDF-exportable reports for an optimal cycling experience. Download today and transform your cycling practice with Bike Sizer! This app uses Apple’s standard End User License Agreement (EULA). You can review these terms [here](https://www.apple.com/legal/internet-services/itunes/dev/stdeula/)
Screenshots
Verdict
The clearest difference is in-app purchases: FSA System at none against Bike Sizer's 1. FSA System also leads on iOS requirement (14.1 vs 17.0). Bike Sizer's advantage is update cadence (weekly vs every 3 months). On price, ads and device support 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. Bike Sizer sells 1 one-off in-app purchase. FSA System asks for nothing beyond the download.
FSA System ships an update every 3 months, Bike Sizer weekly. The most recent releases landed on September 8, 2026 and June 3, 2026 respectively.
| Parameter | FSA System | Bike Sizer |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| Update frequency | Every 3 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 14.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 44 MB | 100 MB |
| Age rating | 4+ | 4+ |
| Developer | F.S.A. srl | TECHNOLOGIES KALIDA INC. |
In-app purchases
FSA System
No in-app purchases
Bike Sizer
- session$2.99









