From one clinic's project to a template for many.

The story

It started in March 2026 with a project for Venus Estética. Then I built a demo to show other clinics, and Clínica Casín Casasola, with six specialties, made it their everyday tool. With what I learned I created Sosiego: a template where each new clinic starts from the best of the previous ones.

What it includes

• Schedules for several practitioners, with rooms and overlap warnings.
• Public booking site: the patient requests an appointment and the clinic confirms it.
• WhatsApp reminders with buttons to confirm or cancel. It is the feature both clinics value most.
• Consent forms signed on the PDF, including with a signature pad.
• Medical records, documents and statistics exportable to Excel.
• Team accounts with permissions per section, and ready-to-use data protection documents.

Three decisions

1. One project per clinic. Medical records are involved, so one clinic’s data never shares a database with another’s. The infrastructure guarantees it, not a rule in the code.
2. Privacy by specialty, enforced on the server. Psychology notes are only visible to the right people, with special rules for minors.
3. Built to cost almost nothing. A forgotten browser tab could make 140,000 reads a day. Now the app disconnects idle sessions, and a typical clinic fits in Firebase’s free tier.