# Smart Rings Atlas

Independent, source-backed comparisons for smart rings, subscriptions, compatibility and fit.

## Core navigation

- [Website](https://smartringsatlas.com/en/): Start here.
- [Ring catalogue](https://smartringsatlas.com/en/rings/): Browse verified product records.
- [Finder](https://smartringsatlas.com/en/finder/): Narrow rings by use case, fit, phone, subscription and market.
- [Comparisons](https://smartringsatlas.com/en/compare/): Compare products and trade-offs.
- [Buying guides](https://smartringsatlas.com/en/guides/): Source-backed selection guides.
- [Learning centre](https://smartringsatlas.com/en/learn/): Fit, sensors, subscriptions, privacy and evidence.
- [FAQ](https://smartringsatlas.com/en/faq/): Direct answers to common questions.

## Latest news

- [Ultrahuman Ring PRO reaches more US retailers](https://smartringsatlas.com/en/news/ultrahuman-ring-pro-us-retail-launch-october-2026/): Android Central reports that Ultrahuman announced a wider US retail rollout for Ring PRO, including in-store sizing at selected Best Buy locations. Checked 2026-10-30.
- [Oura reports Ring 4 sync issue after firmware 2.13.1](https://smartringsatlas.com/en/news/oura-ring-4-firmware-2131-sync-issue/): Oura says some Ring 4 devices may stop syncing after the update, particularly after a phone change. The issue remains open; the company describes a charger workaround. Checked 2026-10-29.
- [Oura brings a new US patent complaint over Ultrahuman Ring Pro](https://smartringsatlas.com/en/news/oura-ultrahuman-ring-pro-new-patent-complaint/): Oura announced another patent case on 23 October. A request to stop US sales is not a new sales ban or a finding of infringement. Checked 2026-10-24.
- [Oura and MD Live plan GLP-1 support for eligible US members in 2027](https://smartringsatlas.com/en/news/oura-md-live-glp1-employer-health-plans-2027/): The announced program pairs Oura wellness tracking with virtual primary care. Access depends on participating employer health plans, not simply owning a ring. Checked 2026-10-23.
- [Galaxy Ring sleep coaching lowers its starting data requirement](https://smartringsatlas.com/en/news/samsung-health-sleep-coaching-three-days-galaxy-ring/): Samsung says its updated coaching can start after three days of sleep data and adjusts weekly. Galaxy Ring is supported, with phone and rollout restrictions. Checked 2026-10-15.

## Trust and machine-readable resources

- [Methodology](https://smartringsatlas.com/en/methodology/): How claims and evidence are evaluated.
- [Ring data](https://smartringsatlas.com/data/rings.json): Public JSON dataset.
- [Guide data](https://smartringsatlas.com/data/guides.json): Public JSON guide dataset.
- [Comparison data](https://smartringsatlas.com/data/comparisons.json): Public fixed-comparison dataset.
- [Commerce discovery](https://smartringsatlas.com/.well-known/commerce.json): Read-only catalogue, languages, markets and buying-link guidance. No ACP checkout, payments or orders.
- [API catalogue](https://smartringsatlas.com/.well-known/api-catalog): RFC 9727 Linkset of public read-only datasets.
- [API description](https://smartringsatlas.com/.well-known/openapi.json): OpenAPI description of the four JSON dataset endpoints. No authentication or write operations.
- [Regional buying links](https://smartringsatlas.com/data/offers.json): Dated official and affiliate links by ring ID and buyer country. Preserve full URLs, match type and affiliate disclosure. Brand stores and model searches are not exact listings.
- [AI catalogue](https://smartringsatlas.com/.well-known/ai-catalog.json): ARD discovery of public tools, datasets and skills.
- [MCP server card](https://smartringsatlas.com/mcp/server-card): Public Streamable HTTP endpoint at https://smartringsatlas.com/mcp. Tools: search_rings, compare_rings, calculate_ring_cost, find_regional_offers. No login, account registration, payments or writes. GET returns 405; use MCP JSON-RPC POST with Accept: application/json, text/event-stream. A compatibility card for older discovery clients is at /.well-known/mcp/server-card.json.
- [Website-only Poppy discovery](https://smartringsatlas.com/.well-known/poppy.json): Website access only; no authenticated agent sessions are advertised.
- [Agent Skills index](https://smartringsatlas.com/.well-known/agent-skills/index.json): Instructions for choosing and comparing rings, calculating ownership costs and finding regional buying links. Verify each skill's SHA-256 digest before use.
- [Sitemap index](https://smartringsatlas.com/sitemap.xml): Page-type sitemaps for all published language editions. Follow the child sitemaps for page URLs.

Product facts cite dated sources. Manufacturer claims, independent findings and editorial conclusions remain separate. Smart Rings Atlas does not provide medical advice or claim hands-on testing unless a page explicitly documents it.

## Agent access

Request any localized page URL with Accept: text/markdown to receive clean Markdown, including sources and country-labelled buying options. HTML remains the browser default. Language is determined by the URL; country selection is independent of language.

Content Signals: search=yes, ai-input=yes, ai-train=no. Search indexing and use in AI answers are permitted; model training is not.