Comparison
Trévor compared with existing tools.
An honest, sourced comparison, to choose with full information. Public information from the relevant publishers, as of September 2026.
| Criterion | Existing sickle cell disease apps1 | Trévor + Coach Drépano |
|---|---|---|
| Access | An app to install, from a store | Telegram, WhatsApp or the browser, nothing to install |
| Conversation | Forms and scripted flows | Natural language, sourced answers, open questions |
| Diseases covered | Sickle cell disease alone | Sickle cell disease, Ehlers-Danlos syndrome and other rare diseases |
| Languages | One language (French or English) | 9 languages, with automatic translation |
| Therapeutic education | Informational content | 19 modules with quizzes, an AI tutor and demonstration videos |
| Behavioural coaching | No app offers this | Automated weekly coaching and human coaching from an expert patient |
| Care and emergency card | Simple digital card (Drepacare) | Printable, in Google Wallet, validated by an HUG haematologist |
| Alert to relatives during a crisis | Yes, up to three contacts (Drepacare) | Under consideration |
| Wearables | None, except Sanius Health (Fitbit, Garmin) | Oura, Fitbit, Samsung, Apple, Google Fit, Garmin |
| Crisis risk score | Sanius Health and SickleSense, English only | Same principle, in French; clinical validation under way with the DREPACOACH cohort |
| Clinician dashboard | Rare, or shared manually | Yes, with alerts, FHIR export and a consultation summary |
| Source code | Closed, at every publisher | Open (GPL-3.0), auditable by anyone |
| Data hosting | France or the United States, depending on the publisher | Switzerland, pseudonymised data |
1. Drepacare, Drep'App, SCD Companion, SCD Warrior, Sanius Health and SickleSense, presented in our detailed comparison.
What really sets Trévor apart
A conversation, not fixed menus
You ask your question in your own words, Trévor answers with sources and logs your symptoms along the way.
The loop closed with clinicians
Questionnaires validated by HUG, a clinician dashboard and a consultation-ready summary: follow-up continues beyond the app.
Therapeutic education at the core
19 modules, quizzes, an AI tutor and weekly behavioural coaching: this has been the core of Coach Drépano since the start.
Nothing to install
Telegram and WhatsApp are already on your phone, including in French-speaking Africa: there is no barrier to entry.
Data sovereignty
Open-source software (GPL-3.0), hosting chosen by the institution, no advertising funding.
Equity of care
CareWatch documents inequalities and barriers to care, a feature unique on this market.