Guide
Getting through twenty-one days
Written for the 21 Day Habit Challenge App on Android 7.0 and later. The app is updated often and screens move, so treat the names below as descriptions rather than exact paths.
On this page
1. Before you start
The app needs Android 7.0 or later. Install it from Google Play, open it, and you can browse the challenge list straight away. The free version shows advertising; what the optional purchases cover is set out under Pricing.
Set aside two minutes now to decide when in your day the action will happen. Not which challenge — when. A daily practice without a fixed slot is an intention, and intentions lose to Tuesdays.
2. Choosing your first challenge
There are 44 or more, grouped by theme: confidence, discipline, communication, morning routines, leadership, emotional intelligence, gratitude, decluttering and so on. Two rules make the choice easier:
- Pick one. Not three. The app is built around one run at a time, and starting several at once is the single most reliable way to finish none of them.
- Pick the boring one. The challenge you are mildly embarrassed to need is usually the one that will pay. The exciting one is usually the one you will abandon on day 6 when it stops being exciting.
Each challenge card shows the length — twenty-one days — and how many people are currently enrolled. Neither number should decide it for you.
3. The daily loop
Every day the app gives you two things: a short insight, which is a sentence or two of framing, and a single action, which is the part that counts. The action is deliberately small — write one word down, ask one question, put one thing away — and then a button to mark it done.
Three things worth knowing about that loop:
- Do the action, do not just read it. Reading the insight and pressing the button is the failure mode this format has. It feels like progress and is not.
- Do not do extra. If the action says write one, write one. Doing five on a good day builds nothing and makes day 3 feel like a step backwards.
- Two minutes is the point, not a limitation. The size is what makes it survivable on the day you are tired, late and not in the mood, which is the day that decides whether the run continues.
4. Setting the reminder properly
On a one-action-a-day format the reminder does most of the work, because the failure mode is almost never difficulty — it is forgetting until 11pm.
Pick a time you are reliably free and reliably awake, and attach it to something that already happens: after the morning coffee, on the commute, before you close the laptop. If the reminder fires at a time you are usually driving or in meetings, you will dismiss it for five days and then stop seeing it.
If reminders stop arriving, the cause is nearly always Android rather than the app — see section 11.
5. The grid and the streak
Twenty-one squares, one per day, filled in as you go, plus a running streak count. This is the whole motivational mechanism and it is not a subtle one: a visible unbroken run is harder to abandon than an invisible intention.
It is worth being clear-eyed about it. A streak is a useful trick, not an achievement in itself, and it has a known failure mode: people who break a long streak often quit entirely rather than lose the number. If you feel that coming, read the next section before you decide anything.
6. When you miss a day
You will miss a day. Almost everyone does, somewhere between day 5 and day 12.
The right response is to do today’s action. Not to restart the challenge, not to do two actions to catch up, and not to decide that the run is ruined. A twenty-one-day run with one gap in it is worth vastly more than three abandoned perfect starts, and the only version of this that fails completely is the one where a missed Tuesday ends the whole thing.
If you have missed four or five days in a row, that is different, and it usually means the time slot was wrong rather than that you were. Change the slot and start the challenge again from day one.
7. The middle week
Days 1 to 5 run on novelty. Days 15 to 21 run on being nearly finished. Days 8 to 14 have neither, and that is where runs die.
Three things that help:
- Shrink the action, do not skip it. On a bad day, do the smallest honest version of what it asked. A tiny done beats a clean skip, because what you are protecting is the sequence.
- Look at the grid, not at how you feel. Around day 10 the feeling of progress disappears well before the progress does. The grid is the more accurate of the two.
- Do not add a second challenge. The urge to start something new usually arrives exactly when the current one gets boring. That is the urge to quit wearing a disguise.
8. Finishing, and what day 22 means
You finish the challenge, the grid is full, you get a badge. What you should not expect is that the behaviour is now automatic.
The “21 days makes a habit” idea is a myth with a long life: it traces to a 1960 book by a plastic surgeon who noticed patients took about three weeks to adjust to their new appearance, and it became folklore from there. The best-known research on the question, a 2010 study that followed people forming everyday habits, found a median of roughly 66 days to reach automaticity, with individual results spread from about 18 days to well over 200 depending on the person and the behaviour.
So what are the twenty-one days actually for? Two real things. They are long enough to prove to yourself that you can sustain something, and short enough that you can see the end from the start, which is what makes people finish. Treat day 22 as a decision point — keep going without the app, run the challenge again, or pick a different one — rather than as a finish line where the habit has been installed.
9. Progress, badges and the feed
The progress screen totals up days completed, longest streak, challenges finished and badges earned. It becomes useful on the second challenge, when the question is whether the first one was a fluke.
The community feed shows other people reaching day 4, day 12, day 7 of something. There is nothing to post and no profile to maintain; it is there so that the exercise feels less like talking to yourself. If it is noise to you, it is safely ignorable.
10. Running more than one challenge
Try to enrol in a second challenge while one is running and the app offers you an upgrade — multiple simultaneous challenges are part of what the in-app purchase covers. Prices and exactly what each item unlocks are shown on the purchase screen inside the app, in your own currency, and that screen is the authoritative one. What is free and what is not.
Worth saying anyway: the constraint is doing you a favour. One challenge you finish is worth more than three you abandon, and nothing about buying the upgrade changes how many small daily actions a person will actually sustain.
11. When something does not work
Reminders stop arriving
Check, in order: Android’s notification settings for the app; whether Do Not Disturb is on a schedule you forgot about; and your manufacturer’s battery optimisation, which on several popular brands kills background apps aggressively. Allow the app to run in the background. No app can grant itself that.
Today’s action will not load
The challenge content is fetched over the network, so a bad connection shows an empty or stuck screen. Check the connection first, then force-close and reopen.
My streak reset when I did not miss a day
Usually a time-zone change or a day marked very late at night, either of which can land the tick on the wrong calendar day. If you travel across time zones mid-challenge, expect one odd day.
I paid and the upgrade has not appeared
Make sure you are signed in to Google Play with the same account you bought it on, then restore purchases from the app’s settings. A different Google account is the usual explanation on a new phone. Billing questions go through Google Play, not through this website.
12. Removing it
Uninstall it the ordinary way. Local progress goes with the app. A purchase stays attached to your Google Play account and is restored if you reinstall — but if any item you bought is sold as a recurring subscription, uninstalling does not cancel it. Check and cancel in Google Play first; see the FAQ.
Still stuck?
The FAQ covers what comes up most often. Anything else goes to hello@bestifyme.com — include the phone model, the Android version and the app version. Billing questions are faster through Google Play, which is where the transaction lives.