July 11th, 2026
You can now connect Google Health to bring your Fitbit, Pixel Watch, or any Wear OS device into IntervalCoach. Your sleep, HRV, resting heart rate, respiratory rate, blood oxygen, skin temperature, and VO2 Max feed straight into your daily readiness, and the workouts you record on your watch upload to Intervals.icu automatically. It's the path modern Fitbit devices use (including the new Fitbit Air), so if your recovery data lives there you get recovery-aware coaching without adding another strap. Connect it under Settings, Integrations (Pro and Max). More on the blog: Your Fitbit and Pixel Watch, Meet Your Coach.
You can now connect IntervalCoach to Claude, ChatGPT, or Cursor, so your AI assistant can read your live training data (your readiness, personal recovery curves, and adaptation signals) and use your coaching tools right inside the chat you already use. Ask it to plan your hard sessions around your calendar or draft a training summary for your coach, all from your real numbers. Available on the Max plan under Settings, Integrations. More on the blog: Bring Your Training Into Claude, ChatGPT and Cursor.
TrainNow can now build a workout around today's readiness, not just your plan: a new "Fit my plan" / "Fit my readiness" toggle means an open day can still give you a proper session matched to how recovered you are, with your recovery limits still in force. Option cards now show an estimated training load (like "≈65 TSS · 60m"), and the status bar shows your Readiness Score. The training calendar got a big upgrade too: a goal banner with your next race, weeks remaining, and fitness trajectory; a planned-vs-actual volume bar; session RPE and workout-compliance badges; a thin intensity strip colored by Intensity Factor on every session; distance and elevation on completed rides and runs; and a "Low Z5+" alert when a race is near but you've been light on VO2max work.
Coach+ now builds real strength and home workouts (instead of quietly swapping in an easy run), can create walks, hikes, and trail runs, switches your whole week to another sport without mismatched durations or duplicate sessions, knows your body trends (VO2 Max, HR recovery, weight, menstrual phase) without being asked to look them up, and can be expanded to a wider panel on desktop. Telling the coach you're sick or unavailable now genuinely protects your plan: those days stay cleared and the next morning respects them, instead of a background sync quietly refilling them. Daily adaptation is more honest too: it names the actual signal behind a change ("your HRV is 15% below baseline"), won't add intensity the day after a hard session or when your body is signalling fatigue, and won't mistake a long easy ride for a hard one.
The Training Plan page can now show weekly hours instead of TSS, displays the coach's own proposal next to any manual override, and the calendar's week summary shows per-week fitness numbers (CTL, ATL, TSB). Tapering got real care: race week keeps you training most days with short openers instead of collapsing to a couple of sessions, taper and race weeks pick up more low-load variety (cadence drills, easy fat-max rides, swim technique), and on a polarized plan your hard days now stay genuinely hard through taper and race week. Workout quality across the board: warmups always build up and cooldowns always wind down (even after load scaling), recovery blocks no longer lock you to a cadence, HR-based easy segments sit in the right zone, fussy micro-steps merge into clean blocks, and interval sets keep every hard rep paired with its recovery. Run segments now show actual pace, and HR segments show your real bpm range.
Analytics gained a Compound Score column (watts × W/kg, fairer across body types) and a Variability Index / Efficiency Factor trend chart. IntervalCoach now speaks Japanese and Korean, bringing the app to 13 languages. In the iOS & Mac apps, iPad got a desktop-class experience: full-width calendar, dashboard, and sidebar, a larger Add Workout sheet covering all sports, and smoother calendar navigation, alongside more responsive quick-stat cards, another pass at eliminating app-hangs, and Mac sidebar and Settings polish.
This week's athlete spotlight: Djeno Points a Whole Spring at the Alpe d'Huez.
Plenty more under the hood: the one-click email unsubscribe link works without logging in, disabled weekly plans are no longer rebuilt overnight, imported long rides next to a race get shortened to short openers, post-workout analysis correctly classifies a session by what you actually did, and head-unit owners get better support (a power tag for IGPSport/XOSS devices, plus new toggles to turn off cadence drills and in-workout coaching messages).
Full changelog with all the details: https://www.intervalcoach.app/changelog
As always, let me know if you run into any issues or have feedback!