Vero: On-Device Recovery and Readiness Scoring for the Watch You Already Wear

Most recovery apps come with a trade-off: either buy into a proprietary band and subscription, or accept a black-box score with little visibility into what drives it. Vero is an iOS app that takes a different approach. It reads recovery and training signals from the watch a person already wears, computes everything on the device, and exposes the underlying physiology alongside the daily score.

Vero is built around the Apple Health ecosystem. Any device that writes to HealthKit can feed it data, but an Apple Watch is the natural fit. Garmin owners can also use Vero by enabling Garmin Connect’s HealthKit sync.

How It Works

Each morning, Vero reads three streams of data from HealthKit and turns them into four scores.

• Recovery (0–100): A weighted composite of overnight HRV (40%), resting heart rate (25%), sleep quality (25%), and blood oxygen (10%), each compared against the user’s 21-day rolling baseline rather than a population norm.
• Sleep (0–100): Combines duration, deep and REM stages, efficiency, and bedtime consistency into a single restorative-quality measure.
• Strain (0–21): Calculated using Bannister’s 1991 TRIMP (Training Impulse), which weights every workout by heart-rate reserve and duration, so a long easy run and a short hard interval session are measured on their actual physiological cost rather than time alone.
• Readiness (0–100): A daily go-or-recover signal built from a morning capacity score (sleep efficiency, deep sleep, duration), an HRV Z-score multiplier against the user’s baseline, and a drain from the day’s accumulated training strain. It is the single number Vero surfaces at the top of the morning screen.

Underneath each score, Vero shows the raw inputs. HRV trend, sleep stages, and load are all visible, so the score can be cross-checked against the data it came from rather than taken on faith.

Personal Baselines from Day One

On first launch, Vero ingests up to 90 days of existing Apple Health data and builds personal baselines locally. The Recovery score uses a 21-day rolling baseline, and the backfill seeds that window, so it is fully populated immediately rather than after a calibration period of guesswork.

Baselines continue to refine as new data accumulates. Vero compares each user only against themselves, so a runner with a habitually low HRV is not flagged for it, and a steady upward HRV trend over weeks shows up as improved recovery rather than being averaged out.

Activity Intelligence by Sport

Rather than collapsing every session into a single number, Vero provides dedicated pages for each modality with metrics chosen for that activity:

• Running: pace, grade-adjusted pace, cardio fitness (VO₂ max), cardiac drift, and a five-run trend summary.
• HIIT: interval count, hard-minute density, and latest heart-rate recovery (HRR).
• Cycling: weekly climbing, heart-rate zone distribution, and training stress.
• Strength: effort percentage and recovery impact.
• Hiking: grade-adjusted pace, climbing trends, and a 10% ramp-rule warning when weekly load is increasing too quickly.
• Walking: walking speed and step length against clinical thresholds, with streak tracking.
• Studio (yoga, Pilates, barre): per-session next-day HRV, so users can see which practices actually support recovery.

The aim is to surface metrics that matter for the activity in question. A cyclist’s training stress and a runner’s cardiac drift answer different questions, and Vero treats them separately rather than averaging them into a generic dashboard.

Weekly Insights and Trends

Vero synthesises the underlying data into plain-language insights. It flags when training load is building too quickly, when sleep quality is slowing recovery, or when a genuine fitness peak has been reached. Each Sunday, it produces a review of HRV, sleep efficiency, and load, along with a short shareable summary.

A forward-looking view uses the user’s current acute-to-chronic workload ratio (ACWR), calculated as a 7-day acute window against a 28-day chronic window, alongside the recovery trend to suggest whether to push, maintain, or back off in the days ahead. The point is not prescription but visibility: surfacing patterns the user can act on rather than rules they must follow.

When the Watch Comes Off at Night

Sleep tracking is optional, but Vero doesn’t simply produce a less-accurate score when the watch is off overnight. It switches to a different scoring pipeline.

In this HRV-only mode, the Recovery score reweights its inputs: the 25% normally assigned to sleep quality is redistributed to HRV (55%) and resting heart rate (35%), so the score leans more heavily on autonomic markers rather than being penalised for missing data. Readiness is rebuilt from an HRV-versus-baseline ratio rather than the sleep-based morning capacity calculation, and the insights drop sleep references that would otherwise be confusing. Strain is unaffected, since TRIMP doesn’t depend on sleep input.

Wearing the watch overnight gives the most complete picture. Without it, Vero still produces personalised scores, calculated from the data available rather than estimated around the gaps.

Data Handling and Privacy

All calculations happen on the iPhone. HealthKit data, personal baselines, and usage patterns never leave the device. Vero does not use accounts, sign-ups, or cloud storage. There are no analytics or advertising frameworks integrated, and no data is shared with third parties.

Access to Apple Health is read-only. Vero reads the metrics it needs to produce scores and does not write to or modify HealthKit data.

Supported Devices and Data Sources

Vero runs on iPhone (iOS 26 or later) and reads from Apple HealthKit. Any device that writes to HealthKit can provide data. Still, the experience is built around the Apple Watch, which continuously captures HRV, sleep, and workouts and feeds them directly into HealthKit.

Garmin users can also use Vero by enabling Garmin Connect’s HealthKit sync, which writes workouts, heart rate data, and sleep data to HealthKit, where Vero can read them. The fidelity depends on what Garmin Connect chooses to share, but for people who prefer Garmin hardware, this route works well.

Things to Note

• Apple Watch gives the best signal. Garmin via Garmin Connect works, but Apple Watch’s direct HealthKit integration provides the most continuous and granular data.
• iPhone-only, English-only for now. There is no iPad-optimised view or additional localisation at present.
• Scores are interpretive, not diagnostic. Vero is a training tool, not a medical device. Athletes managing health conditions should treat the scores as one signal among several.

Pricing

Vero is free to download and use, including the four daily scores and per-sport activity pages. Premium adds personalised coaching insights and costs $ 5.99/£5.99 monthly or $ 39.99/£39.99 annually. New users get a 7-day Premium trial on first launch.

What’s Next

Planned additions include support for swimming as a dedicated activity and customised workout-session comparison analysis, allowing users to compare a specific workout against past sessions of the same type rather than against general baselines.

Summary

For Apple Watch owners (and Garmin owners who route data through HealthKit) who want HRV-driven recovery and readiness scoring without buying into another hardware ecosystem, Vero offers a credible alternative. It computes everything on-device, exposes the underlying physiology alongside the daily score, and provides dedicated per-sport pages rather than a single, flattened metric.

Vero is available on the Apple App Store with a free tier and an optional paid subscription for personalised insights. More information at verohealthai.com.

More: Vero Health AI

Author: @RonW, edited by the5krunner

https://verohealthai.com/

Last Updated on 27 May 2026 by the5krunner