1. The commercial relationship is always visible
These comparisons are published by BreathFriend. They are not independent editorial reviews. Every comparison page contains a visible disclosure near the title and links back here. We do not hide BreathFriend's ownership behind a generic publication name.
2. Feature facts come from current primary sources
We prefer official Google Play listings, official product pages and manufacturer support documents. Each article includes a “Sources checked” section with the date of review. Community posts may reveal a question worth answering, but they are not used as the sole source for a product capability.
3. We do not invent hands-on tests
When a comparison is based on public product information, we say so. We do not claim hours of testing, clinical validation or device compatibility that did not occur. A store description can verify that an app advertises haptics; it cannot prove that the vibration feels clear on every watch.
4. Rankings are use-case recommendations
There is no single numeric score. Apps are ranked for a job: custom Wear OS sessions, built-in Galaxy Watch breathing, class depth, external-sensor HRV or simple phone pacing. A competitor can rank above BreathFriend whenever it better fits the stated job.
| Criterion | What we look for | Why it matters |
|---|---|---|
| Native device support | Whether the active session clearly runs on Wear OS or Android | Phone features do not answer a watch-intent query |
| Start friction | Tiles, complications, quick start and phone dependence | Breathing is often needed in a short real-life moment |
| Cue model | Haptic, visual, voice, audio and screen-off behavior | Users differ in whether they can watch or listen |
| Timing control | Inhale, holds, exhale, total duration, ramps and presets | “Custom” can range from one slider to a full editor |
| Biometric model | Live HRV, heart rate, resonance testing or pre/post snapshot | Those features are not equivalent |
| Content depth | Classes, programs, technique explanations and variety | A library can beat a timer for learners |
| Transparency | Pricing, hardware, compatibility and claim limitations | Hidden requirements create bad recommendations |
5. Medical and performance claims are treated cautiously
Breathing apps are wellness products unless a specific regulated status is documented. We avoid promising that an app will treat anxiety, cure insomnia, improve disease or diagnose stress. HRV and recovery scores are described according to the product's current positioning and accompanied by limitations.
6. Update policy
Commercial comparison pages show a visible updated date. We review priority pages when a major app update, pricing change, platform transition or Search Console change makes the existing answer less useful. Minor design edits do not receive a new date.
7. Corrections
Feature availability changes quickly. To report an error, use the privacy policy contact method and include the page, the disputed statement and a current primary source. Material corrections should update both the visible copy and structured data.
8. How readers can reproduce the choice
Install the free version where available, create or select the same gentle pattern, complete a session on the intended device with the screen dimmed and compare start friction, cue clarity, interruption behavior and whether the extra data or content changed the experience. That short real-world test is more useful than a universal score.