Quit21

Every day without nicotine, explained.

You don't have to do this alone. Quit21 guides you through every day of quitting. Each morning it explains what your body is doing and what to expect, with one thing to try. Each evening you close the day in a diary you can read back.

Download on the App StoreGet it on Google Play

Free. English, Ukrainian and Spanish.

The Changes tab. You've had no nicotine for 22 days. A list of pages from twenty minutes to day eight, each with a title such as One of the hardest days.

What a day looks like

There is a page for every stage, from the first twenty minutes to the first year. Cigarettes and vapes each have their own set, and every page names its sources. Read every page on the site.

  1. 08:00

    The morning tells you what today is

    The morning reminder opens today's page. What is happening in your body, what the day usually feels like, and one thing to try that fits it.

    A symptom you were warned about reads as part of the process. One nobody mentioned reads as proof that quitting was a mistake. That is why each page names the unpleasant part before it arrives.

    Day 5
    Nights
    What to expect

    Waking at three or four in the morning, fully alert, sometimes with a craving attached. Feeling underslept by lunchtime, which makes the whole week seem worse than it is.

    Try this

    Get up at your usual time however the night went. A fixed morning is what resets the clock.

    Every page lists its sources underneath.

    From the page for day 5, cigarettes.

  2. Any time

    A craving gets one button

    SOS sits on the home screen. It opens on what you've saved and on the reasons you wrote when you quit, in your own words. You can edit them in Settings whenever the reason that holds changes.

    Then a minute of paced breathing. Your phone vibrates at every change of breath, so you can follow it with your eyes closed. Afterwards one tap records what set it off, and the diary keeps it with the day.

    The SOS screen. Money saved and cigarettes not smoked at the top, three reasons in the user's own words, a button to breathe for a minute, and two equal buttons, It passed and I smoked.
    What set it off? Eleven one-tap choices, including coffee, alcohol, stress and work.
  3. 21:00

    The evening closes the day in a diary

    How the day felt, whether it went clean, and a line of your own if you want one. The diary keeps every day since you started, so a hard week can be read back later next to the easy ones.

    • Three faces for the mood, no score and no interpretation.
    • Cravings you got through are counted as well as slips.
    • The only first-person sentence in an entry is the one you wrote.

One cigarette is not a reset

Most quit apps punish a cigarette by wiping your count, or ignore it and pretend it never happened. Quit21 takes off what you actually smoked and counts the days again from tomorrow.

The money you've saved, the cigarettes you haven't smoked and every page you've already read all stay. So there is no reason to hide a slip from the app, and the numbers stay true.

FigureBeforeAfter one cigarette
Cigarettes not smoked339338
Saved169.58 $169.08 $
Pages you've opened2525
Day countDay 23Day 1 tomorrow
A pack of 20 at 10 $, so one cigarette costs 50 cents. That is all it takes off.
The home screen. 169.58 dollars saved, 339 cigarettes not smoked, 16 packs not bought, the next milestone in 10 hours, and the SOS button.

Calm by design

The home screen leads with two numbers in large type: what you have saved and what you have not smoked. Below them sit a few quiet cards, your medals, a piggy bank for something you are saving towards and a widget for your phone's home screen, and the SOS button at the bottom.

The totals grow every day, and a slip only takes off what you smoked. When a craving hits, one look at them is often enough, and SOS is one tap away.

Setting up the vape track. What do you use? Disposables, pods or tank, how many a week, and what one costs.

Cigarettes, heated tobacco or vapes

Pick what you're quitting first. Heated tobacco is counted in sticks, like cigarettes. Vapes get their own arithmetic, by disposables, pods or liquid, and never an invented "cigarette equivalent".

They get their own pages too. Nobody who quits vaping is told their carbon monoxide has cleared, and every vape page says who the evidence was measured on.

When did you quit? A calendar for September 2026 with the chosen date marked.

Already quit? Start from that day

Pick the date you stopped, up to three years back. Quit21 counts what you haven't smoked since then and what it saved you, and opens every page you've already lived through.

If you're quitting today, it starts counting from the moment you tap the button.

Everything works from the first day

  • The core is free for goodEvery day page, SOS, the diary, your totals and both tracks never lock. Quit21 Plus adds medals, the piggy bank, the widget and the full statistics, with ten free days for every new user.
  • No accountNo sign-up and no login. Your diary, your slips and your reasons stay on your phone.
  • Your money, in your currencyForty-one currencies, Latin American pesos included. The app guesses yours from the phone, one tap changes it, and the price and currency can be edited later in Settings.
  • English, Ukrainian and SpanishEvery screen and every day page exists in all three languages. The app follows your phone, and you can switch any time in Settings.
  • Small adsA banner at the foot of the home screen, the SOS screen and the diary, never on a day's page or during breathing.
  • No cigarette anywhereNot in the icon, not in the notifications, not on the screen you open during a craving.

Where to get it

  • AndroidOn Google Play now.
  • iPhoneOn the App Store now.
Download on the App StoreGet it on Google Play

Questions

What happens if I smoke a cigarette?

You log it, and the total takes off the cigarettes you actually smoked. The day count starts again tomorrow, as Day 1. The money saved, the cigarettes not smoked and every page you've already read stay as they were, and the app says so on screen the moment you log it.

Can I use it if I quit a while ago?

Yes. Pick the date you stopped, up to three years back, and Quit21 counts everything since then straight away. The pages you've already lived through are open to read, and the daily reminders carry on from wherever you are.

Does it work for vaping and heated tobacco?

Yes. Heated tobacco is counted in sticks and follows the cigarette pages. Vaping has its own arithmetic and its own pages, which never mention carbon monoxide or tar and never convert a vape into cigarettes.

How is the money worked out?

From what you tell it. How much you smoked or vaped, what a pack or a device costs, and how long it has been, minus anything you log as a slip. The price is today's price, and you can change it in Settings.

Is it free?

The core is, for good: every day page, SOS, the diary, your totals and both tracks. Quit21 Plus adds medals, the piggy bank, the widget and the full statistics and removes the small banner, by the month, by the year or once for good. Every new user gets ten days of it free, and everyone who installed before Plus keeps all of it. On iPhone everything is open for now.

Do I need an account? What happens to my data?

No account. Your diary, your slips and your reasons are stored on your phone and are never sent to us. The phone's own backup can keep a copy, in your Google account on Android or in iCloud on iPhone, which is what brings your history back on a new phone. The privacy page has the details, including the ad.

Which languages?

English, Ukrainian and Spanish, all complete. The app follows your phone's language and can be switched in Settings.

Is this medical advice?

No. Quit21 is a tracker and a guide to what quitting usually feels like. It does not diagnose or treat anything. For medication or nicotine replacement, talk to a doctor, a pharmacist or a stop-smoking service.