# Clue (BioWink)

**Canonical:** https://apis.io/providers/clue-app/  
**Website:** https://helloclue.com/  
**APIs profiled:** 0

Clue, operated by BioWink GmbH in Berlin, Germany, is a science-driven menstrual, ovulation, pregnancy, and reproductive health tracking app with 100M+ downloads across 190+ countries. The product portfolio spans Clue (free tier), Clue Plus (subscription), Clue Conceive, Clue Pregnancy, Clue Perimenopause, and a "Clue (No Period)" mode for non-bleeding hormonal cycles. Clue Connect provides partner sharing. The company contributes anonymized real-world data to academic research partnerships with Stanford, University of Oxford, UC Berkeley, MIT, and the Bill & Melinda Gates Foundation. Clue is a consumer mobile product; no public developer API or partner API portal has been identified. This entry catalogs the company surface for the API Evangelist index.

## Kin Score — 7.7 / 100 (minimal)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 7.7).

| Facet | Score |
|---|---|
| Discoverability | 44.4 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 4.8 |
| Commercial Clarity | 10.5 |
| Access Clarity | 10.5 |

Regulatory layer — **Health**: 20.0 (matched via tags).

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Security (2)

- **Clue App Domain Security** — TLSv1.3 · HSTS · DMARC
- **Clue App Vulnerability Disclosure** — security.txt · contact published

## Tags

Femtech, Women's Health, Reproductive Health, Period Tracker, Cycle Tracking, Fertility, Pregnancy, Perimenopause, Research Data, Consumer App

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/clue-app/). Scores are computed from the provider's own public artifacts under a published rubric.