WattLog is a training tool for cyclists who want to understand their sessions — not just log them. Download the app, connect your smart trainer, and let it handle the data.
You train 3–5 times a week and want to know if it's working. WattLog shows whether your fitness is building or stalling — and why. No spreadsheets, no guesswork.
Your athletes collect data but you struggle to make sense of it across many accounts. WattLog organises metrics so you can see at a glance who is ready to push and who needs rest.
You already have tools but want something without a subscription that runs in the browser and keeps your data yours. WattLog is a tool, not a platform with a paywall.
Install the macOS app — it runs a local Bluetooth bridge that lets your trainer talk to the web interface. One-time setup, then it stays out of the way. Works with Wahoo KICKR, Tacx NEO, Elite Suito and any FTMS-compatible trainer.
Create a free account, open the training interface in your browser, and pair your trainer and heart rate monitor. The app handles the Bluetooth — you just click Connect.
Power (W), heart rate (bpm), cadence (RPM), current power zone and interval timer — all visible during the session, logged every second. After the ride you get the full picture, not just summary numbers.
Every session produces a report: Normalized Power (NP), Intensity Factor (IF), Training Stress Score (TSS), aerobic decoupling. Every metric has a plain-English explanation built in — no engineering degree required.
The Performance Management Chart (PMC) shows your CTL (long-term fitness), ATL (recent fatigue) and TSB (readiness right now). You see trends across weeks, not just yesterday's ride.
WattLog isn't finished. It's being shaped right now — and the first 10 riders who join will have a direct say in what gets built next. Not a survey. Not a feedback form. A real conversation about what actually matters on the trainer.
"The best training tools weren't designed in a boardroom. They were refined by athletes who used them every day."