Medical and scientific basis

Last reviewed: November 7, 2026

What Ferah does and doesn't do

Ferah is an app that helps you stay motivated on your quit-smoking journey. The numbers and health information it shows are for general information and motivation.

Ferah is not a medical device; it does not diagnose conditions, recommend treatment, or replace your doctor. Ferah was not prepared by a healthcare professional, and your entries are not monitored by one. If you are considering medication or a nicotine product, have severe withdrawal symptoms, or have a health condition, talk to your doctor. In a medical emergency, contact the emergency services where you are.

How the numbers are calculated

All calculations happen on your phone, using the information you enter:

• Smoke-free time: the time since you quit. Logging "I smoked" restarts the current counter from that moment.
• Cigarettes not smoked: days passed × cigarettes you used to smoke per day, minus the cigarettes you logged.
• Savings: cigarettes not smoked × (pack price ÷ 20).
• Time regained: cigarettes not smoked × the minutes you spent per cigarette.

If you change your habit or pack price, the new values apply only from that moment on; past calculations do not change. These numbers are estimates, not exact measurements.

Health timeline

Some stages of the health journey are based directly on the sources below and are shown with a source label in the app. Stages without a source label describe commonly reported changes and personal milestones (such as your first week or 100 days) for motivation; they are not presented as definitive scientific findings.

Timings are general averages and vary from person to person. That is why the texts use "may". Reaching a stage's time does not mean that change has happened for you.

Sources we use:

• NHS (UK National Health Service): What could happen when you quit smoking. https://www.nhs.uk/better-health/quit-smoking/ready-to-quit-smoking/what-could-happen-when-you-quit-smoking/
• CDC (US Centers for Disease Control and Prevention): Benefits of quitting. https://www.cdc.gov/tobacco/about/benefits-of-quitting.html
• WHO (World Health Organization): Health benefits of smoking cessation. https://www.who.int/news-room/questions-and-answers/item/tobacco-health-benefits-of-smoking-cessation
• CDC: Cigarettes and cardiovascular disease. https://www.cdc.gov/tobacco/about/cigarettes-and-cardiovascular-disease.html

These organizations did not prepare, endorse, or support Ferah.

Tools for tough moments

The 60-second break, breathing exercises, and the Distract game are simple tools designed to shift your attention when a craving comes. They are not a treatment.

If you spot a mistake

If you think any information is wrong or out of date, email digital@dariusmedya.com; we'll review it and correct it if needed.