What's new in v1.3.3: Supported heart-rate-guided steady rides now keep one control authority through warmup, work, and recovery, so trainer commands continue to follow the workout's intended mode. Power-led intervals and fixed-power phases keep their scheduled prescription without adding heart-rate-driven watts above it. Trainer floors and ceilings, disconnects, manual overrides, and targets that could not be delivered are identified in the ride report instead of being hidden. Every completed or interrupted ride now creates an exportable diagnostics bundle with report.json and events.ndjson, including the exact app version, build, iOS version, and diagnostics schema. Use Export Ride Diagnostics in the post-ride summary to share the evidence after a ride. Still no subscription, no account, and no cloud requirement.

What's new in v1.3.2: This build tightens the ride-start and landscape ride experience. The dashboard now puts the primary start actions and readiness state in one clear launch panel, and the live ride screen fits the timer, trend, controls, and phase progress cleanly in landscape. Zone Pedal is clearer about when HR-guided control has real trainer authority. Supported steady rides still use heart rate to guide compatible trainer resistance when there is usable headroom. If an easy ride is pinned near the trainer floor, the ride report labels that limit instead of presenting it as clean control. Short intervals and imported workouts stay power-led with heart-rate guardrails. Post-ride diagnostics now separate unreachable targets, trainer floor saturation, manual overrides, incomplete recovery, and leg-stop events so the app learns from the right evidence. Cardiac-profile and HRmax handling are more conservative: clearly mismatched interval targets are called out, user-entered HRmax stays under your control, and floor-limited or overridden reps are kept out of seed learning. Still no subscription, no account, and no cloud requirement.

What's new in v1.3.1: ZonePedal gives more honest feedback when interval targets are unreachable or miscalibrated. If trainer response, current fatigue, or HR setup cannot realistically reach the configured band, post-ride diagnostics call that out instead of treating it like a normal missed interval. Manual override, recovery, floor-saturation, and leg-stop diagnostics are cleaner. Reps you intentionally override, or reps where the trainer was already at its practical floor, stay out of seed learning. Incomplete recovery is labeled directly, and stopping because your legs are done is reported as its own signal. Cycling HRmax mismatch handling is more practical for age-estimated and observed HRmax values: one hard low-ceiling completed or leg-stop workout with sustained hard below-band evidence can lower the learned ceiling. User-provided HRmax stays under your control, and clearly overestimated user-provided values get immediate interval-target honesty in the workout report. Simulator and package tests now cover additional disruption and resilience paths around these reports, without changing ZonePedal's local-only design. Still no subscription, no account, and no cloud requirement.

What's new in Build 29 / v1.3: ZonePedal now gives more honest feedback when interval targets are unreachable or miscalibrated. If your trainer, current fatigue, or HR setup cannot realistically reach the configured band, post-ride diagnostics call that out instead of treating it like a normal missed interval. Manual override, recovery, and leg-stop diagnostics are cleaner. Reps you intentionally override stay out of seed learning, incomplete recovery is labeled directly, and stopping because your legs are done is reported as its own signal. Cycling HRmax mismatch handling is more practical for age-estimated and observed HRmax values: one hard low-ceiling completed or leg-stop workout with sustained hard below-band evidence can lower the learned ceiling. User-provided HRmax stays under your control, and clearly overestimated user-provided values now get immediate interval-target honesty in the workout report. Still no subscription, no account, and no cloud requirement.

Major update: smarter control, better first ride, .zwo import. CONTROL SYSTEM • Rewrote how the controller blends your cardiac profile with FTP-derived targets — interval workouts now hit the right intensity from the first rep • Fixed K estimator instability during work/recovery transitions — consistent power across all intervals • Reduced trainer resistance flutter with 2-second power write gating and wider delta threshold • Added ERG spiral protection — if cadence drops dangerously, power ramps down automatically FIRST RIDE EXPERIENCE • "Discover Your Cardiac Response" — renamed and reframed calibration ride with real-time learning messages • Post-ride Proof Card — shareable summary showing your cardiac efficiency, response speed, and zone precision • Progressive reveal — Your Body tab shows your cardiac profile after just one ride instead of waiting for three • "Try a Sample Ride" demo mode — see how the system works before connecting hardware HEART-FIRST ARCHITECTURE • Removed FTP from onboarding — the system bootstraps entirely from your heart rate parameters • Dynamic power cap derived from your cardiac coupling coefficient (K) instead of static fitness tiers • Intensity-segmented K estimation — separate cardiac models for endurance and high-intensity efforts NEW FEATURES • Import any Zwift workout (.zwo) — opens with the Files app, preview before you ride • DFA alpha1 aerobic threshold tracking validated (16/16 studies pass) • Corrected power targets for Tabata, Billat 30/30, Rønnestad 30/15, and Seiler 4x8 to match published protocols BUG FIXES • Fixed control loop freeze under CPU pressure • Fixed warmup/cooldown over-allocating time on shorter rides • Fixed VO2max regression from single noisy rides • Fixed physiology history not updating for recovered sessions • Fixed BLE auto-reconnect for saved heart rate monitors