Comparison

FSA System vs Bike Sizer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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!

About

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.

Highlights
  • AI-driven bike sizing
  • Extensive bike database
  • Positioning enhancement
  • PDF-exportable reports
  • Cycling practice optimization
Features
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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

FSA System4 screens
Bike Sizer4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Bike Sizer sells 1 one-off in-app purchase. FSA System asks for nothing beyond the download.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 5 level
FSA System versus Bike Sizer: the parameters behind the verdict, then further details
ParameterFSA SystemBike Sizer
PriceFreeFree
Positive reviews—0.0% of reviews
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS14.1 — better17.0
Further details — not scored
Size44 MB100 MB
Age rating4+4+
DeveloperF.S.A. srlTECHNOLOGIES KALIDA INC.

In-app purchases

None

FSA System

No in-app purchases

1 purchases

Bike Sizer

One-time1
  • session$2.99

Questions

Is FSA System free?
FSA System is free to download, with no in-app purchases.
Is Bike Sizer free?
Bike Sizer is free to download, with in-app purchases available.
Do FSA System or Bike Sizer have ads?
Neither FSA System nor Bike Sizer shows ads.
Which is updated more often, FSA System or Bike Sizer?
FSA System ships an update every 3 months, and Bike Sizer weekly. Most recently, FSA System was updated on September 8, 2026 and Bike Sizer on June 3, 2026.

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