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Day 1 or day 0?
How to count smoke-free days

“100 days smoke-free” can arrive on different dates for two people who quit the same evening. One counts from the clock, the other ticks calendar days. Both are valid; pick one.

NFM Apps guide · 2026-10-03

Two ways to count

MethodHowSuits
Last-cigarette timeOne day per 24 hours since the last cigarettePeople who want exact elapsed time
Calendar daysTick each day you didn’t smokePeople who close the day with a log

Say your last cigarette was Monday at 11 pm. By the clock, day two ends Wednesday at 11 pm. By the calendar, Tuesday was the first full day without smoking, so Tuesday is day one.

Tricky cases

This guide is general information about tracking and habits, not medical advice. For stop-smoking medicines or nicotine products, severe withdrawal, existing health conditions or pregnancy, talk to a doctor, pharmacist or a stop smoking service. Free help: 1-800-QUIT-NOW (US), Smokefree National Helpline 0300 123 1044 (England), or your local quitline.

How the app counts

Record tab with the date field, cigarette-cut card and current streak of 1 day
Record tab
1

Calendar days, one cut per day

Quit Smoking Tracker counts calendar days. A day you cut the cigarette is a smoke-free day, and consecutive days form your streak. If you haven’t cut today yet but yesterday is logged, your streak holds; cutting today adds one.

2

Fill in past days

Tap the calendar icon in the date field, choose an earlier date and cut the cigarette to save that day too. Any gap breaks the streak at that point.

History tab calendar for June 2026 with the 7th checked
History calendar
3

Check the History calendar

Scan the History calendar for missing ticks and fill any gaps.

The app’s screenshots show sample amounts in Korean won (4,500 per pack is the app default), and the Settings sheet title is shown in Korean in the current English version. Enter your own local pack price; the calculation works the same in any currency.

FAQ

I forgot to log yesterday. Did my streak break?

Change the date to yesterday on the Record tab and cut; the streak reconnects.

I want a live hours-and-minutes counter.

The current public version counts in days. Write your last cigarette time in the day-one memo if you want it on record.

Quit Smoking Tracker

No sign-up, works offline, and your records stay on your phone. Free on Android, in English and Korean.

Get it on Google Play