Compare Apple Watch Stress & HRV Apps
Explore documented features, measurement methods and limitations when comparing Cortisol+ with other stress and HRV apps.
Updated September 16, 2026 · By Cortisol+ Editorial
Compare the job you need an app to do
A stress score is an interpretation of data. Compare its inputs, explanations, access requirements and cost before treating the number as useful to you.
These guides disclose our role as the publisher of Cortisol+. They are documentation comparisons, not independent clinical accuracy tests.
Choose a comparison by what you want to learn
| Your goal | Start here | What to check |
|---|---|---|
| Understand Apple Watch stress scores | Five-app comparison | Inputs, explanations, subscription access and missing-data behavior |
| Consider an alternative to Welltory | Welltory versus Cortisol+ | Data sources, features and how the score is explained |
| Track actual hormone levels | Cortisol testing guide | A wearable wellness score cannot replace a hormone test |
| Keep a record without a subscription | Free observation journal | Record your own observations without calculating a hormone level |
How we compare products
We link official product documentation and store listings, disclose that we make Cortisol+, and distinguish documented features from hands-on testing. Scores from different apps are not interchangeable. Prices, trial eligibility and supported devices can change; verify the current offer before subscribing.
For another way to explore the tradeoffs, see our shared Perplexity app-comparison conversations. We requested these AI answers and show the prompts; they are not independent reviews.