Subintervals vs Bike Fast Fit Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Subintervals
Visualize your training data with detailed displays and interactive graphs. Customize your analysis and sync seamlessly with intervals.icu for up-to-the-minute insights into activities, events, and performance metrics.
- Detailed activity and event visualization
- Interactive performance graphs
- Seamless intervals.icu sync
- Customizable data analysis
- Actionable training insights
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Elevate Your Training with Subintervals Subintervals transforms your intervals.icu data into actionable insights. This app brings your training activities, events, and performance metrics to life through detailed displays and interactive graphs. Customise and control your data for a tailored analysis, and seamlessly sync with intervals.icu for up-to-the-minute information. Key Features: - Detailed visualisation of activities and events. - Dynamic, interactive graphs for performance tracking. - Effortless sync with intervals.icu. Please note that it is an independent application developed by an enthusiast keen on providing a complementary tool to the official platform.
Bike Fast Fit Pro
This app provides professional bike fitting tools for cyclists and shops. It offers advanced features for precise fits, including rider and bike data management, automatic video capture, and AI-driven adjustment recommendations. Generate custom reports to showcase improvements and manage your business flow.
- Rider and bike data management
- Automatic video capture
- Markerless tracking analysis
- AI-generated adjustment recommendations
- Customizable PDF and video reports
- Real-time analysis
- iCloud synchronization
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Bike Fast Fit Pro (BFF Pro) is the ultimate bike fitting tool designed for professional bike fitters and bike shops, offering powerful features at an affordable price. As the newest addition to the Bike Fast Fit family, BFF Pro provides advanced tools to ensure precision bike fits for all types of riders. Whether you’re managing a large clientele or fine-tuning a rider’s fit for optimal comfort and performance, BFF Pro streamlines the process from data management to detailed reporting. Comprehensive Rider Management * Easily capture and organize rider details and sessions. * Collect information on the rider's bicycle and the bike's setup. * Define your own custom data to collect for riders, bikes and sessions. * Improved search, filtering, and sorting tools to handle large volumes of client data. * Seamless integration with iCloud for secure backup and synchronization across devices. Intelligent Recording * Automatic video capture triggered by pedal strokes or a timer, ensuring efficient data collection. * Analyze both side profile and frontal rider videos for a more complete view of a rider’s fit. * New recording overlays tailored to different bike types. Powerful Analysis Tools * Industry leading markerless tracking built from our library of over 250 million video frames for fast, reliable and hassle-free analysis. * Add physical markers to tailor the point placement to your own specifications. * Zoom into key frames for detailed examination with over 70 unique measurements. * AI-generated recommendations for adjustments to saddle height, positioning, and more to enhance rider comfort and efficiency. * Real-time analysis now available—no video recording required! Dynamic Dashboard * Real-time visualization of key measurements with customizable ranges. * Virtual changes feature lets you predict the impact of bike adjustments before applying them. Customizable Reports * Generate branded, professional PDF and video reports to share with clients. * Personalize reports with your logo, contact details, and custom color schemes. * Compare initial and final videos to showcase the improvements made during the fit. Business Support * Enjoy unlimited fitting sessions and clients with no hidden costs. * Use the status of fitting sessions to manage your work and business flow. * Full integration with BFF Elite and BFF EZ for seamless data sharing and continued session analysis. * Generate management reports showing bike fitting activity. Built for the Future Since 2012, Bike Fast Fit has been continually innovating. BFF Pro sets the stage for future enhancements, including bike characteristic tracking, frame recommendations, and much more. Terms of Service: https://bikefastfit.com/terms.html Privacy Policy: https://bikefastfit.com/privacy.html
Screenshots
Verdict
Subintervals and Bike Fast Fit Pro both sit at 5.0 stars, but that hides the real split: 100% of Subintervals's written reviews are positive against 71% of Bike Fast Fit Pro's. Bike Fast Fit Pro's advantage is ratings volume (20 vs 2). On price, rating, 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. Subintervals sells 4 one-off in-app purchases and Bike Fast Fit Pro sells 1 in-app purchase, starting at $99.99 per year. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for Subintervals against 5.0 for Bike Fast Fit Pro. That said, the two scores are not equally well evidenced: Bike Fast Fit Pro has 20 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 100% of Subintervals's written reviews are positive against 71% of Bike Fast Fit Pro's.
Subintervals ships an update weekly, Bike Fast Fit Pro every 10 days. Both last shipped on November 4, 2026.
| Parameter | Subintervals | Bike Fast Fit Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (20 ratings) |
| Positive reviews | 100.0% of reviews — better | 71.4% of reviews |
| Number of ratings | 2 | 20 — better |
| Update frequency | Weekly — better | Every 10 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 15.5 — better |
| Further details — not scored | ||
| Size | 109 MB | 276 MB |
| Age rating | 4+ | 4+ |
| Developer | Inaki Arroyo Nebreda | Double Dog Studios |
Customer experience
Subintervals
Bike Fast Fit Pro
In-app purchases
Subintervals
- Coffee$3.99
- Lunch$11.99
- Big Thanks$17.99
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- Sponsor$44.99
Bike Fast Fit Pro
- Annual Subscription$99.991 Year









