Running · Triathlon5K → marathon · Sprint → full Ironman

The performance tool for endurance sports.

One app to build, track, analyse and adapt your training.

Notify me at launch Coming soon to the App Store See the app

Works withApple WatchGarminWHOOP

More data collected than ever. Never actually put to use.

Athletes have never measured their activity and physiological state so closely. Watches, wearables and sensors collect dozens of data points every day: sleep, HRV, heart rate, load, power, pace, and more.This data makes it possible to better understand the current form, recovery and how the body responds to training.But this data is rarely analysed, interpreted and built into the preparation.It is scattered across several devices and apps, while the plan, sessions, recovery and nutrition are often handled separately.

Last 28 days · 6 signals a day

168readings collected over 4 weeks

0adjustments to the training plan

NextHow it works

Training that is built, adjusted, explained.

  1. Built around the goal.

    The athlete sets their goal, the race date and the time they have. PREVAIL structures the preparation into training blocks, then spreads key sessions and volume around their constraints, so they arrive ready on race day.

  2. Adjusted to the condition of the day.

    Every morning, PREVAIL analyses the physiological signals and checks that the planned load still fits. When needed, it adjusts the session’s intensity, volume or scheduling.

  3. Explained, and reversible.

    Every adjustment states what changes and which signals justify it. The athlete accepts it or keeps the planned session.

Three signals. A proposal that evolves.

The principle behind PREVAIL’s analysis: dozens of signals are compared with the athlete’s own baseline, not on fixed values.

42 ms
28 msBaseline · 54 ms68 ms
5h40
4h00Baseline · 7h309h00
+14%
−20%0% · stable load+40%
Today’s status
Form score · 35 / 100
Incomplete recovery
7-day baseline: 54 · Gap: −19
Today’s sessionAdjustment proposed
Easy run
Running · 40 min · Z2 · RPE 4 / 10
Reason

HRV: 42 ms (−22%) · Sleep: 5h40 (−24%) · 7-day load: +14%

Moving a signal changes the proposed session. Nothing applies without the athlete’s agreement while the form score stays above 26; below that, PREVAIL can lighten the session on its own.

NextWho it is for

For experienced endurance athletes.

PREVAIL is built for runners and triathletes who already train consistently, prepare for specific goals and want a structured plan, detailed sessions and data that is analysed with a real purpose.

Typical profileExperienced runner or triathlete
Running
5K → Marathon
  1. 5K
  2. 10K
  3. Half
  4. Marathon
Triathlon
Sprint → Ironman
  1. Sprint
  2. Olympic
  3. Half
  4. Ironman
Time available
6 to 12 h / week
Sessions
4 to 7 per week
Goals
1 to 3 per season
Connected watch
already in place

This typical profile is not an entry requirement: PREVAIL adapts to each athlete’s level, available time and goal — including those who are just starting out or preparing for their first race.

PREVAIL gives them a framework to structure their preparation more effectively and make fuller use of their potential.

NextThe app

Measuring is not enough.Understand, then adapt.

All your training, in one place.

PREVAIL turns the athlete’s data into concrete decisions for every stage of their preparation.

Understand your form. Build your plan. Complete your sessions. Adapt your nutrition. Analyse your progress.

From the first signal of the day to the analysis of performances, every screen plays a part in the athlete’s preparation — and every piece of data feeds into the next.

Screens shown in French — the app’s only language today. An English version of the app is coming soon.

01Cockpit

Every morning, understand your current form and the session your day calls for.

The Cockpit is the first screen the athlete finds when opening PREVAIL. It gives a clear reading of the day’s form and shows what that means for the session.

  • The form score out of 100 and the key markers, built from the main physiological signals: sleep, HRV and resting heart rate.
  • The day’s decision: PREVAIL compares the athlete’s physiological state with the planned session and recommends keeping or adjusting it, with a clear explanation.
  • The day’s session, directly accessible from the Cockpit.
  • The daily check-in, to record how the athlete feels and let PREVAIL enrich its analysis.
  • The PREVAIL chat, available at any time to understand a recommendation or ask a question.

Current form. Today’s session. PREVAIL’s recommendations.

02Plan

Your plan, all the way to race day.

The Plan gives the athlete a complete view of their preparation, from the current week to race day. Every session fits into a structured progression built around their goal.

  • The phases of the preparation: aerobic base, build, specific and taper.
  • Progress through the plan: the current phase, the week within the block and training volume spread day by day.
  • The detail of each day, with the option to add a session when the athlete wants to complement or adapt their training.
  • Projected form, to see how form is expected to build up to the peak planned for race day.
  • Sessions straight to the watch: a session can be sent to a compatible device. Once completed and confirmed, it syncs back to PREVAIL automatically to be analysed.

A structured plan for your goal. A plan that evolves with you.

03Session

Every session, structured and explained.

Before each session starts, the athlete knows exactly what to do, from the first block to the last, and why this session matters in their preparation.

  • The session’s goal, with the reason for its place in the plan and what it is meant to develop.
  • The session’s structure, block by block, with the duration, zone and power or pace to hold for each.
  • A cue for every block: what to feel, what to focus on and which zones to stay in.
  • The session straight on the watch, leaving nothing to focus on but the session itself and executing it well.
  • Nutrition around the effort, with recommendations suited to the session.

Know what to do. Understand why. Execute it well.

04Nutrition

Your nutrition adapts to your training load.

PREVAIL matches the athlete’s nutritional needs to what they are actually about to do, rather than to a fixed average. Every day is adjusted to their training load and goal.

  • The day’s energy needs, split between metabolism and the energy the planned training requires.
  • Macronutrient intake: carbohydrates, protein and fat in grams per kilo, each placed within its recommended range.
  • Hydration, with daily needs and the amount to drink during the effort.
  • Weight over time, to follow its trajectory in line with the athlete’s goal.
  • The nutrition week, with carbohydrate intake day by day.

Fuelling every session. Powering performance.

05Analysis

Understand what your data says about your progress.

The Analysis screen lets the athlete follow how their form and performance evolve over time. Every data point is read against their own baseline, to understand what their training really produces.

  • Recovery, with HRV, resting heart rate and sleep compared with their baseline ranges.
  • Training load over the past seven days, set against their usual recent load.
  • The aerobic signature, with how bike power and running pace evolve at the same heart rate.
  • How training is distributed: the share of each discipline against what the plan prescribes, and the time spent in each intensity zone.
  • Analyses that evolve with the data.

Measure. Understand. Progress.

  1. 01Cockpit
  2. 02Plan
  3. 03Session
  4. 04Nutrition
  5. 05Analysis
The PREVAIL app’s Cockpit screen: a form score of 62 out of 100, load, sleep, HRV and resting heart rate, then the day’s decision and the planned session — a 45-minute threshold swim — with its start button, the daily check-in and the way into the chat.
The PREVAIL app’s Plan screen: week 7 of 16 in the build phase, nine sessions and 9 hours spread over five days, the day’s two key sessions linked — swim then run — with their duration, zone and pace, then the 16-week block with the projected form curve up to the peak and the four phases of the preparation.
The PREVAIL app’s Session screen, Instructions tab: a brick of 3 h 30 on the bike and 50 minutes of running, its duration, zone and pace, the session’s goal, its structure block by block with the target power or pace of each, the transition and nutrition around the effort.
The PREVAIL app’s Nutrition screen: a high-load day, two sessions and 1 h 25 of training, 3,178 kcal split between metabolism and training, carbohydrates, protein and fat placed within their recommended range, hydration, the weight curve, carbohydrates for each day of the week and the next high-load day.
The PREVAIL app’s Analysis screen: three weeks and twenty-four sessions, HRV, resting heart rate and sleep compared with the athlete’s baseline range, the load ratio, the aerobic signature on the bike and on the run, best efforts, volume over the past twelve weeks, the share of each discipline, time spent in each zone and the heart-rate profile.
NextPricing

One subscription for the whole training cycle.

Every option gives access to all of PREVAIL: only the billing cycle changes.

Included in every option

Training plan
Structured around the goal, up to race day.
Adjustments
Every morning, based on the day’s condition.
Recovery
Sleep, HRV and resting HR against the athlete’s own baseline.
Nutrition
Adjusted every day to the training load.
Analysis
Progress, measured over time.

14-day free trial, whichever option is chosen.

Billing cycle
Notify me at launch

Payment is handled by the App Store. After the 14-day trial, the chosen option is billed, then renewed automatically. Cancellation is done from the Apple account settings. To avoid the first charge, cancellation must happen at least 24 hours before the trial ends.

Frequently asked questions.

What happens if you miss a session?

PREVAIL assesses its importance in the athlete’s preparation and the load planned for the following days. If it is still needed, PREVAIL reschedules it for a better-suited moment. Otherwise, it reorganises the rest of the plan without systematically trying to make up the lost volume.

Can you decline a proposed adjustment?

Yes, in most cases. PREVAIL explains what changes and the signals behind it before any modification. The athlete can then accept the adjustment or keep the session as planned, and their choice is taken into account for the rest of the plan. When several critical signals line up, however, PREVAIL can lighten the session by itself, without waiting for that agreement — the athlete can still restore it afterwards.

How is PREVAIL different from a plan found online?

A fixed plan follows a progression set in advance. Every morning, PREVAIL matches the planned session to the athlete’s physiological state, completed sessions and constraints. When a gap justifies it, PREVAIL proposes an explained adjustment without losing sight of the goal.

Who can access your data?

The athlete’s measurements are processed by PREVAIL and by the technical providers the service needs to operate. Access is limited to what is necessary. This data is neither sold nor used for advertising. The athlete can export it or request its deletion at any time.

Prepare for your next goal with PREVAIL.

Running or triathlon: athletes can leave their email address to be notified as soon as PREVAIL launches on the App Store.

Coming soon to the App Store

The app is in French today. An English version is on the way — leave an address below to hear when it launches.

The address provided will only be used for two emails: a welcome message on sign-up, then the launch announcement. Privacy policy