Train sharp. Pack smart.
Toe the line race-ready.
One Start: Xtreme MultiSport turns the chaos of marathon, open-water, and multisport preparation into one clear, local system — adaptive training, race-week logistics, and honest readiness data, all in your pocket.
Everything race day demands. Nothing it doesn't.
Six systems working together so your energy goes into training — not into spreadsheets, gear panic, or guesswork.
Adaptive Training Engine
Pulled from a deep interactive library of drills and sessions, your plan calculates workload, splits it into microcycles, and balances effort across every discipline you're chasing.
Smart Recalibration
Lost three days to a deadline or a head cold? The schedule doesn't panic — it re-prioritizes on the fly, keeping you moving forward without tipping into overtraining.
Race-Week Logistics Vault
A gear checklist shaped by your exact event format and forecast, plus travel documents and accommodation details — all in one place, so transition-zone panic never happens.
Readiness Analytics
Real performance data feeds a readiness engine that tracks fatigue, flags weak spots, and tells you plainly what to fix — pacing, fueling, or simply rest.
Taper With Confidence
Know exactly when to back off. The system times your taper so you land on the start line fresh, not fried, and peak precisely when the gun goes off.
Built For Zero Signal
No wifi at altitude camp, no bars on race morning — none of it matters. Everything runs locally on your device, start to finish.
Race Readiness Simulator
A small taste of the taper logic running inside the app. Set your event and your numbers, then watch your training-load curve and readiness score respond.
Adjust the sliders and hit simulate to see your taper curve for a Marathon build.
About Us
Why we built the training HQ we always wished existed.
We're a small crew of triathletes, marathoners, and open-water swimmers who got tired of juggling six different apps, three spreadsheets, and a shoebox of race-day notes just to get to a start line prepared. So we built the one tool we always wished existed.
Our mission is simple: replace race-prep chaos with a clear, structured system that adapts to your real life — not the other way around. Missed a session because work exploded? Life happens. The plan should bend, not break.
Inside, you get an adaptive training engine built on a deep library of drills and sessions, a race-week logistics vault for gear, documents, and travel details, and an analytics core that reads your fatigue and readiness — all running locally, all working offline, from your kitchen table to a remote training camp with zero signal.
One system. Every discipline. Zero guesswork.
Built by athletes, for the version of you that shows up on race morning.
Privacy Policy
Short version: your training data stays on your device. Always.
1. Information We Collect
One Start: Xtreme MultiSport collects nothing. We do not gather your name, email, location, training history, biometric data, gear lists, or device identifiers. There is no sign-up, no account, and no hidden telemetry pinging a server in the background. What you enter — your training plan, your equipment checklists, your race documents — exists only inside the app, on your device.
2. How We Use Information
Because nothing is collected, nothing is used. We do not analyze your workouts, sell insights about your training habits, or build a profile of you as an athlete. The readiness scores, taper recommendations, and workload calculations you see are computed entirely on-device, for your eyes only.
3. Data Storage
All information — training microcycles, exercise history, equipment checklists, accommodation and document notes — is stored locally in the app's private storage on your phone or tablet. There is no cloud sync, no remote database, and no backup server operated by us. If you delete the app, that data is gone with it.
4. Third-Party Services
We do not integrate third-party analytics SDKs, advertising networks, or behavioral trackers. The app does not phone home, does not embed tracking pixels, and does not share data with partners, because there is no data to share in the first place. One Start is designed to run fully offline, without requiring network access at all.
5. Data Security
Since your information never leaves your device, it is protected by the same security model as your phone itself — your device passcode, encryption, and OS-level sandboxing. There are no servers of ours to breach and no accounts of yours to compromise.
6. Children's Privacy
One Start: Xtreme MultiSport does not knowingly or unknowingly collect personal information from anyone, including children under 13. Because the app has no data-collection mechanism whatsoever, it is inherently compliant with children's privacy protections such as COPPA.
7. Your Control
You are always in full control. There are no accounts to manage and no data requests to file — because we hold none of your data. To remove everything the app has ever stored, simply delete the app from your device; all locally saved plans, checklists, and analytics are permanently erased with it.
8. Changes to This Policy
If our practices ever change, this policy will be updated within the app and on this page, along with a revised effective date above. Continued use of the app after an update constitutes acceptance of the revised policy. Given our offline, no-collection design, we do not expect substantial changes.
9. Contact
Questions about this policy? Reach us at privacy@onestartxtrememultisportapp.com.
Contact Us
📮 Got a question about pacing your first half-distance race, a bug to flag, or a partnership idea worth exploring? We'd genuinely love to hear from you — drop us a line and a real person (usually mid-taper themselves) will write back.
⏱️ We typically respond within 24–48 hours — faster than your fastest transition.