# ReSomnia

> ReSomnia is the first Belgian CBT-I app (cognitive behavioural therapy for insomnia). It guides people every day with a sleep diary and a six-week programme, and lets them share their progress with their clinician.

## About

- Free, with no ads.
- Languages: English, French and Dutch.
- Health data encrypted and stored in the European Union, never sold. Account deletion in one tap.
- Web app that installs on your phone (Android and iPhone) and works on desktop.
- Published by ADLX Studio (Belgium), founded by Andy Leleux, a sleep technologist for more than ten years.
- ReSomnia does not replace medical advice and does not diagnose.

## Who it is for

- Adults with insomnia who want to follow the first-line method recommended by the European guidelines.
- CBT-I trained clinicians (psychologists, physicians, sleep technologists) who follow their patients between sessions.

## Features

- Two-minute sleep diary on waking, with sleep efficiency worked out for you
- Guided six-week programme: sleep window, stimulus control, racing thoughts, relaxation, relapse prevention
- Validated questionnaires (ISI, Epworth, PSQI, chronotype) and progress charts
- Safety questions before sleep restriction, with referral to a doctor when needed
- Sharing with your clinician through a six-digit code or an invitation, revocable at any time
- Clinician space on desktop and mobile: diary, questionnaires and messages in one place

## The method

Cognitive behavioural therapy for insomnia (CBT-I) is the first-line treatment in European guidelines. ReSomnia brings its tools together: sleep diary, sleep window and a guided programme.

- CBT-I is the recommended first-line treatment for chronic insomnia. (European Insomnia Guideline, Riemann 2023)
- Online CBT-I programmes clearly reduce insomnia severity. (Meta-analysis, Soh 2020)
- Support from a professional helps people complete the programme. (Systematic review, Takano 2025)

- Riemann D, et al. The European Insomnia Guideline: An update on the diagnosis and treatment of insomnia 2023. J Sleep Res. 2023;32(6):e14035. doi:10.1111/jsr.14035
- Soh HL, et al. Efficacy of digital cognitive behavioural therapy for insomnia: a meta-analysis of randomised controlled trials. Sleep Med. 2020;75:315-325. doi:10.1016/j.sleep.2020.08.020
- Takano Y, et al. Remission, treatment response, and treatment adherence across the delivery methods of cognitive behavioral therapy for insomnia. Sleep Med Rev. 2025;84:102204. doi:10.1016/j.smrv.2025.102204
- Kyle SD, et al. Sleep restriction therapy for insomnia is associated with reduced objective total sleep time, increased daytime somnolence, and objectively impaired vigilance. Sleep. 2014;37(2):229-237. doi:10.5665/sleep.3386

## Key resources

- [ReSomnia: learn to sleep again with CBT-I](https://resomnia.app/en.md): The first Belgian CBT-I app: sleep diary, guided six-week programme and clinician follow-up. Free, in English, French and Dutch, with your data kept in the EU.
- [Your patients, between sessions too.](https://resomnia.app/en#praticiens): Psychologists, physicians, sleep technologists: follow your patients' sleep diaries day by day, spot who is drifting and adjust the sleep window on reliable data.
- [Your questions](https://resomnia.app/en#questions)
- [Test ISI (in French)](https://resomnia.app/tests/isi): Test ISI gratuit (Index de sévérité de l'insomnie) : 7 questions sur vos deux dernières semaines, votre score sur 28 et sa catégorie tout de suite. Sans compte.
- Contact: hello@resomnia.app

## Pages

- [Politique de confidentialité (in French)](https://resomnia.app/confidentialite): Comment ReSomnia protège vos données de sommeil : données de santé (RGPD art. 9), hébergement dans l'Union européenne, vos droits, la suppression du compte.
- [Conditions d'utilisation (in French)](https://resomnia.app/conditions): Conditions générales d'utilisation de ReSomnia : objet du service, statut réglementaire, partage avec votre praticien, engagements de chacun et droit applicable.
- [Mentions légales (in French)](https://resomnia.app/mentions-legales): Mentions légales de ReSomnia : éditeur ADLX Studio, hébergement, propriété intellectuelle, avertissement médical, données personnelles et droit applicable.

## Other languages

- [Français](https://resomnia.app/fr/llms.txt)
- [Nederlands](https://resomnia.app/nl/llms.txt)