Bike Sizer vs ROCKBROS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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/)
ROCKBROS
Connect your cycle computer and indoor trainers for comprehensive data analysis. This app offers professional insights and dedicated services for cycling enthusiasts to enhance their indoor training.
- Cycle computer connectivity
- Indoor trainer support
- Professional data analytics
- Dedicated indoor training services
- Seamless indoor training sessions
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ROCKBROS offers cycle computer connectivity and data analysis features, supporting connections to indoor cycling trainers for seamless indoor training sessions. It provides professional data analytics and dedicated indoor training services tailored for cycling enthusiasts.
Screenshots
Verdict
The clearest difference is in-app purchases: ROCKBROS at none against Bike Sizer's 1. ROCKBROS also leads on iOS requirement (13.0 vs 17.0). Bike Sizer's advantage is update cadence (weekly vs every 2 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. ROCKBROS asks for nothing beyond the download.
Bike Sizer ships an update weekly, ROCKBROS every 2 months. The most recent releases landed on October 22, 2026 and October 28, 2026 respectively.
| Parameter | Bike Sizer | ROCKBROS |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Weekly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 100 MB | 118 MB |
| Age rating | 4+ | 4+ |
| Developer | TECHNOLOGIES KALIDA INC. | YIWU ROCK SPORTING GOODS CO LTD |
Customer experience
Bike Sizer
ROCKBROS
In-app purchases
Bike Sizer
- session$2.99
ROCKBROS
No in-app purchases
