CORE3 builds your training plan, sets your nutrition to match, and rewrites both as your fitness and fatigue shift. One coach that keeps up with you.
Fitness · CTL
68+4
42-day avg
Fatigue · ATL
86+8
7 day avg
Form · TSB
−18
Optimal
Ramp · CTL/wk
+2.8
Steady build
Fitness · Fatigue · Form
Last 42 days
Training Readiness
AI Adapted
Optimal
Build phase · high load OK
Weekly Training
186 km this week
Power PBs
FTP · 287W · 3.7 w/kg
How it works
Connect your gear once. CORE3 calibrates to your real fitness, then keeps your plan, workouts, and macros current as the data comes in.
Six inputs, one decision. Trinity weighs them against each other rather than one at a time. A bad night of sleep moves the intervals. A cold front changes the session, not just what you pack for it. A race two weeks out changes both, and what you eat between now and then.
Meet Trinity
Trinity reads what your training did to you. Every session, every check-in and every night of sleep lands on its own, and by morning it holds your fitness (CTL), your fatigue (ATL) and the form between them. Tell it you’re gassed and it checks your HRV before it answers. Sleep badly, cut a session short or peak two weeks early, and the week reshuffles around what is left, macros and race-day fuelling with it. Then it tells you why it made the call, every time.
01|Adaptive coaching
It builds a picture of you over time, from every session, every check-in, and every bit of feedback you hand back to it.
Trinity
OnlineMessage Trinity…
02|Workout planning
Your week never goes to plan. Trinity reshuffles the load when it falls apart, so you’re not rebuilding your schedule by hand every Monday.
SAT · WEEK 6 OF 16
03|Nutrition tracker
Your macros move with your load. Hard weeks get more carbs, recovery weeks lean on protein, and race week shifts into a carb load on its own.
TODAY · FEB 20
Targets raised
~1212 kcal of training today lifts your macro goals to match.
The feedback loop
We built a loop that runs after every session you sync. Trinity reads what the session did to you, checks that you are still on course for the date in your calendar, and reshapes the weeks ahead when you are not.
The moment a session lands, Trinity goes through it. Whether you held the targets, what the effort cost you, and anything you have never done before. The summary is usually waiting before you go looking for it.
Every morning it asks how you slept, how the legs feel and where your head is. That sits next to what your watch recorded overnight. A hard week you are handling and a hard week that is breaking you look the same on paper.
Then it moves the work. It asks whether you are still on pace for the date you gave it, works out why if you are not, and reshapes the weeks. You get the change, the reason behind it, and a way to put it back.
Then your next session starts it again.
Integrations
Connect the devices and apps you already use. Your data comes in on its own, no manual entry.
More integrations on the way. Want one? info@coreiii.com
Why CORE3
The load and fatigue models coaches have used for thirty years, run on your own data and updated every day. The same models run whether this is your first structured block or your tenth season of racing. What changes is your numbers, not the coaching.
Established performance modelling, run on your own numbers rather than a population average. It measures what each session actually cost you and what you can carry today: the same maths a good coach would do, done every morning.
Encrypted in transit and at rest, and used for one thing: coaching you. Never sold, never passed to data brokers, never mined to build a profile for anyone else. Export your full history whenever you want, and when you close your account the data goes with it.
Every change arrives with its reason attached. The bad night of sleep, the drop in HRV, the session you cut short, and what each one costs you elsewhere in the week. Disagree and you can put it back. Nothing moves in your plan without you being able to see the working.
Trinity runs on Gemini, Claude, GPT, Grok or Kimi. Free uses Gemini; on Pro and Max you pick. The engine underneath stays ours: your training, your fuelling, your recovery and the races you are pointed at, turned into a protocol whichever model you choose.
“We’re building the coach we always wanted for ourselves: one that’s honest about your data and never leaves you guessing what to do next.”
Pricing
The first 500 waitlist members lock in everything CORE3 will ever ship for $99 a year, and keep that rate for good even as the standard price climbs.
Full access to every CORE3 feature, present and future. One price, locked for life.
$99/year
$600/yr at standard Max rates, so you save 83%
Free for 30 days · cancel any time · rate locked for life
$0
A real coach from day one. No card, ever.
No card required
$20/mo
For athletes training week in, week out.
Every new account gets 30 free days of Pro
$50/mo
For the block that decides your season.
Upgrade any time, including during your free 30 days
Every plan includes an AI debrief on every ride you sync, unlimited device connections, and your full training calendar. Trinity usage is measured daily and weekly, and higher plans raise your limits.
Founding members keep $99 a year for life, even as these prices rise.
FAQ
The questions we get asked most.
CORE3 is an AI performance coach that brings your training, nutrition, and recovery into one place. It learns from your workouts, meals, sleep, and readiness, then adjusts your plan so you’re always training at the right intensity.
CORE3 works with Garmin, Wahoo, Hammerhead, Strava, and Apple Health out of the box, with COROS next in line, and we’re adding more based on what people ask for. If your device syncs with any of these, your data comes in automatically.
It reads your fitness numbers (CTL, ATL, TSB) alongside what you eat and how you recover. From there it works out what you can handle right now and adjusts your upcoming sessions, macro targets, and rest days to match.
We’re starting with cycling because the data is richest there: power meters, structured workouts, full session files. The engine itself isn’t tied to one sport, and running and triathlon support are next on the roadmap.
The first 500 waitlist members get the Founder Pass: full access to every CORE3 feature, present and future, for $99 a year. That rate is locked for life, even as we add features and the standard plans (Pro at $20 a month, Max at $50 a month) go up. Once the 500 spots are gone, it’s gone.
Your data is encrypted at rest and in transit, and we only use it to coach you. We never sell it, and you can export or delete it whenever you want.
Founding members
CORE3 isn’t public yet. Grab your spot and lock in founding-member pricing before we open the doors.
$99/year
$600/yr at standard Max rates, so you save 83%