Meet the redesigned Ramp4x4. - Bring your lab results into your training. Manually record VO₂ test results, tested maximum heart rate and prescribed heart-rate targets. - A cleaner Today screen brings your next workout, recent sessions and cardio fitness together. - A redesigned 8-week plan makes your next session and training progress easier to follow with Ramp4x4+. - Clearer iPhone and Apple Watch workout layouts put the interval countdown, heart rate and target status first. - Refreshed workout summaries and detailed interval views help you review your effort, time in target and recovery. - An updated Progress view brings workout history and available Apple Health Cardio Fitness trends into one place. - Clearer Cardio Fitness source and date information keeps Apple Health estimates separate from workout performance. Classic Norwegian 4x4 workouts remain free. Apple Watch is optional.

New in 2.4: • Choose your training goal, preview a 4x4 session without recording a workout, and set an optional reminder to get started. • More reliable Apple Watch workouts, with improved timing, reconnection, and completed workout summaries on iPhone. • Saved workouts open a fuller summary with total duration, available heart-rate metrics, and interval details. • Voice cues respond when you turn them on during an active workout. • Eligible athletes can review an updated max-heart-rate estimate from Home. Your target range changes only if you choose to update it. • Improved readability on smaller Apple Watches and more dependable heart-rate source handling. Keep training with guided intervals, live zone feedback, and the 8-week plan.

MORE ACCURATE HEART-RATE ZONES Ramp4x4 now estimates your maximum heart rate with the HUNT equation (211 - 0.64 x age), measured at NTNU, the Norwegian institution behind the 4x4 protocol. If you train with an age estimate, you will see your current and corrected zones side by side and choose. Nothing changes until you accept, and completed workouts keep the zones you trained against. A measured maximum heart rate is still used first whenever you have entered one. SEE THE EVIDENCE A new How Ramp4x4 works page in Profile explains where each training number comes from, with sources and limits. SIMPLER SCREENS Today, Plan, Progress, the Train tab and the workout summary are easier to scan. FIXES - Outdoor Apple Watch workouts now show the route map on the iPhone summary. - Bluetooth heart-rate monitors are released when a workout ends, so they no longer reconnect in the background. - Rate Ramp4x4 opens the App Store review page when the rating prompt cannot appear.

Version 2.2 makes it easier to get a great first workout, with or without an Apple Watch. • No Apple Watch? Start with the timer or connect a Bluetooth heart-rate monitor right from the workout screen • A preview of your first week helps you know what to expect • Rate how hard each workout felt to keep your training on track • Improved Live Activity and Lock Screen workout display • Smarter workout reminders • Rate Ramp4x4 directly inside the app • Reliability and performance improvements

Version 2.1 brings clearer workout guidance, a redesigned training plan, and deeper insight into every interval. • A redesigned Today screen puts your next workout first • A clearer 8-week plan shows weekly goals and lets you approve suggested adjustments • Redesigned workout summaries explain high-intensity time, interval results, heart-rate targets, and recovery • Expanded Cardio Fitness, HRV, readiness, and Progress views help you follow your training • Named workout presets and activity-specific recording make sessions easier to set up • Improved iPhone and Apple Watch syncing, reconnection, and workout saving • Refined Watch layouts, compact controls, and accessibility improvements

Ramp4x4 2.0 makes the Norwegian 4x4 easier to start, follow, and understand. • A new Ramp4x4 app icon • A guided 8-week plan with clear weekly progress and next steps • Faster onboarding with your personal heart-rate target from the start • Redesigned summaries centered on effective high-intensity time, time in target, recovery, and interval quality • Sharper Apple Watch coaching with clearer phase, heart-rate, voice, and haptic feedback • Clear heart-rate source selection for Apple Watch, AirPods Pro 3 or Powerbeats Pro 2 through Apple Health on supported devices, compatible Bluetooth heart-rate monitors, or Timer Only • Reliability improvements for workout start, pause, resume, mirroring, saving, and duplicate prevention • Less intrusive feedback prompts around the Premium screen Train the full session. See what it delivered. Know what to do next.

- Home screen UI fixes - Added TRAIN tab on iPhone - Removed Apple Health confirmation from initial startup - Bug Fixes

- Fix workout summary bugs - Consolidated VO2 Max score within workout summary - Voice coach now only announces once when you're not in the vo2 zone - Fixed vo2 max target range sync

Redesigned workout summaries with clearer VO₂ max training results New time above 90% max HR tracking for 4x4 sessions Improved workout quality insights for pacing, recovery, and consistency Updated share cards for cleaner post-workout results Better Apple Watch workout cues and phase feedback Analytics and performance improvements General polish and bug fixes

- Clearer post-workout summary. It now leads with the numbers that matter for a VO2 session: total time, your heart-rate curve, and time above 90% of max HR — instead of a confusing "in target" percentage. - "Peak HR" replaces "Max HR" across the summary and share card. - Redesigned shareable card. Cleaner and social-ready, with your full-workout heart-rate curve and per-interval bars. - New 4x4 Quality Score. Your session is broken into sub-scores — zone adherence, completion, recovery, and data quality — with short coaching notes. - Streamlined to a focused Norwegian 4x4. One clean, fixed protocol so the workout is simpler to start and run. - Refreshed onboarding and sharper in-app copy.

Ramp4x4 has been rebuilt around clearer VO₂ target coaching. What’s new: • New VO₂ Target Range system instead of generic Zone 5 labels • Cleaner Apple Watch workout screen with bigger interval state and target feedback • Live “Below Target,” “In VO₂ Target,” and “Above Target” guidance • Time-in-target tracking for each interval • Improved post-workout interval analysis with HR response and recovery details • Bluetooth heart-rate device support, including compatible HR broadcast devices • More compact pre-workout setup screen • Updated voice and haptic cues • Apple Health workout sync improvements • General reliability, copy, and UI cleanup

Bug fixes and improvements