You Know Your FTP. Do You Know Your W'?
FTP explains your threshold — W' explains why repeated attacks crack you faster than a steady effort. Bike Analytics turns the watts your power meter already records into Critical Power, W', and the pacing decisions that come from them. Calculated locally on your iPhone.
Your data, your questions
Ask AI about your training sessions
Turn a session or a period of training into a question with context. The app prepares a prompt from the data you choose, ready for your own AI assistant.
- Review your latest session
- Compare your latest session with the previous one
- Compare weeks or months and discuss load, recovery or technique
- Select a session or comparison period, then choose what you want to understand.
- Choose ChatGPT or Claude. Review the data you agree to share before pasting and sending the prepared text.
- The app copies your prepared text and opens the assistant. Paste it into a new chat, review it and send it yourself.
What happens to my data?
Metrics and the prepared question are generated locally on your device. This feature uses no AnalyticsZone AI server and sends no prompt automatically. You copy the text, open your own assistant, then decide whether to paste and send it. The AI provider processes only what you send under its own policy and account settings.Read the privacy policy
What do I need?
You can explore the analysis options without Premium. Copying the prompt and opening the assistant require Premium. You use your own ChatGPT or Claude account; their access limits and terms apply separately.

Screenshots
See Bike Analytics in action
Real app screens for reviewing your bike data.
FEATURES
Advanced Bike Analytics Features
FTP & Critical Power
Why do two riders with the same FTP race so differently? W-prime balance and Critical Power add what a single number leaves out — your real ceiling and your finite capacity to ride above it.
Power Zones
7 personalized zones calibrated to your own FTP — so every interval has a clear purpose, not just a number to hit.
Training Load (CTL/ATL/TSB)
Turn your weekly numbers into a plan: chronic and acute load, plus a form score that tells you when to push and when to recover.
Aerodynamics & Efficiency
CdA estimation and drag analysis that translate your position and effort into real speed — for road and time trial alike.
Period Comparisons
See whether your numbers are actually trending up — weekly, monthly, yearly — with automatic peak detection, not just a folder of past rides.
Analysis on your device
Analysis and AI question preparation run locally, without an AnalyticsZone AI server. You choose whether to copy the text and send it using your own assistant.