# Make every day nonzero. Give every habit a minimum: one page, a ten-minute walk. A day only counts as a zero if you did nothing at all, and you never take two in a row. Habit tracker for iPhone and Android · No account · No ads · Free ## Rules that forgive you. ### Every habit has a minimum Set a full target and a minimum for each habit. On a hard day, one page still counts. ### Only nothing is a zero Did any habit today, even just its minimum? Then today is nonzero. ### Never miss twice Miss a day and come back the next, and your streak carries on with a gap. Only two zeros in a row end it. ### Rest is not a miss Give any habit rest days, or pause everything for a holiday or an illness. Neither breaks a streak. ### Your month is a circle One ring per habit, one slice per day. Filled is done, half is the minimum, a dot is rest, an outline is a miss. ### About two months Each habit shows its way to becoming automatic: “Becoming a habit · 41 of 66 days”, then “Settled in”. ## Try the rule - **A zero is forgiven** when the next day that counts is nonzero. It shows as a gap, and the streak carries on. - **Two zeros in a row** end the streak. The next nonzero day starts again at one, and counts as a comeback. - **Rest is neutral.** A rest day neither counts nor breaks anything. ## Open, check, close. Today shows what's due, each habit with Min and Done. One tap marks it, and the ring fills in. - **Your year at a glance.** Every day, and tap one to open its month. - **Widgets.** Today and your month on your Home Screen, on iPhone and Android. - **One reminder a day,** at the time you choose. Never a pile of them. - **Pause,** for a holiday or an illness, without losing your streak. - **Start from templates.** Pick up to three habits and go. - **Your data, as a file.** Export and import whenever you like. The app keeps seven days of backups on the phone. ## The only zeros we like. The Nonzero app has no account and no ads, and your habits never reach us. To help improve the app, it sends anonymous usage counts and crash reports; one switch in Settings turns them off. Export your habits to a file whenever you like, and the app keeps seven days of backups on the device. ## Questions, answered. ### Is Nonzero free? Yes. The free plan holds up to 4 active habits, counting challenges and habits to break, with the ring, the year, the Today and Month widgets, the daily reminder, and export and backups. Archiving a habit frees its place and keeps its history. ### What does Pro add? Unlimited active habits, three more colour themes (Cobalt, Ember and Dusk) and a Lock Screen streak widget on iPhone. It's US$12.99 a year or US$24.99 once, and the App Store and Google Play show your local price. ### Do I need an account? No. There's nothing to sign up for. Your habits are kept on your phone, and we never receive them. ### What if I miss a day? Come back tomorrow and your streak carries on, with a gap where you missed. Only two zeros in a row end it. ### Which languages? Fourteen, from English and Español to 日本語 and Chichewa. The app follows your phone's language, and you can change it. This site offers your browser's. --- Nonzero · https://nonzero.mse.today/en # What is a nonzero day? *Updated 29 September 2026* **In short:** A nonzero day is a day when you did at least one thing toward a goal, however small. In Nonzero, a day counts when at least one habit is marked Done or Minimum. It's a zero only if something was due and nothing got done. ## How Nonzero counts a day Each habit has a full target and a minimum. Every day you mark a habit one of four ways, and each has its own shape, so you can read your month in any colour. - **Done** — You hit the full target. - **Minimum** — You did the small version. The day still counts. - **Rest** — A planned day off. It neither counts nor breaks anything. - **Missed** — It was due and didn't happen. Never shown in red. ## Never miss twice, worked through Your streak counts nonzero days in a row. One zero is forgiven if the next day that counts is nonzero: it shows as a gap, and the streak doesn't grow. Two zeros in a row end it. | Day | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Was | Done | Done | Done | Zero | Done | Rest | Done | Zero | Zero | Done | Done | Done | | Streak | 1 | 2 | 3 | 3, gap | 4 | 4 | 5 | 5, gap | ended | 1 | 2 | 3 | Best streak 5, and 2 comebacks: days 5 and 10. ## Why a minimum helps Starting is often the hardest part. A minimum small enough for your worst day turns that day into a small win instead of a broken chain. On good days you do the full target; on hard days, one page is enough. ## How long does a habit take? In a 2010 study, people took a median of 66 days for a new daily habit to feel automatic, with a range from 18 to 254 days. Nonzero shows each habit's way there: “Becoming a habit · 41 of 66 days”, then “Settled in”. ## Words we use - **Nonzero day** — A day with at least one habit marked Done or Minimum. - **Zero day** — A past day when something was due and nothing was done. - **Minimum** — The smallest version of a habit that still counts, such as one page. - **Never miss twice** — One zero is forgiven if you come back the next day; two in a row end the streak. - **Gap** — A forgiven zero. The streak neither grows nor breaks. - **Comeback** — A nonzero day that comes straight after a zero. - **Rest day** — A planned day off for a habit. It neither counts nor breaks a streak. ## Questions ### Does a rest day break my streak? No. Rest days are neutral. They don't add to the streak, and they don't break it. ### Can I fix yesterday? Yes. Today and yesterday stay open. After that the day is settled, so your history doesn't shift under you. ### Isn't doing the minimum cheating? No, it's the point. The minimum is what keeps a hard week from ending a good habit. ## Sources - Lally, P., van Jaarsveld, C. H. M., Potts, H. W. W. and Wardle, J. (2010). How are habits formed: Modelling habit formation in the real world. European Journal of Social Psychology, 40(6), 998–1009. --- Nonzero · https://nonzero.mse.today/en/method/nonzero-days # Privacy policy *Last updated 30 September 2026* Nonzero is built so that your habits stay yours. This policy covers the Nonzero app and this website, nonzero.mse.today. ## The app The app has no account and no server of our own. Everything you enter, such as habits, marks and settings, is stored on your phone. We never receive it. To help us improve the app, it sends anonymous usage counts to Aptabase and crash reports to Sentry. Usage counts come from a fixed list of events, such as which template you started from or where in the app you marked a habit (Today, Month or a widget), with the app's version, the phone's system and its language. A crash report holds technical details such as the error, the phone's model and its operating system. Neither includes your habit names or emoji, anything you type or the dates of your marks, and neither is linked to you. Aptabase counts users with a code that changes every day, not a device ID, and works out your country and region from your network address without keeping the address. We strip identifiers, such as the network address, from crash reports before they're stored. Both are on when you install the app. One switch in Settings, “Help improve Nonzero”, turns both off. It keeps up to seven daily backups on your phone. The app never sends them anywhere; you can export them yourself, to a place you choose. Reminders are scheduled on your phone. Nothing about them is sent to us. Deleting the app deletes its data. Your phone's own backup, such as iCloud or Google backup, may include the app's data under your account with Apple or Google. ## This website The site is hosted by Cloudflare. Like any web host, Cloudflare processes technical information such as your IP address and browser type to deliver pages and keep the service secure. If you allow it, we count visits with Google Analytics. It sets cookies, and Google processes information such as your IP address, device, browser and the pages you visit, possibly outside your country. We see only totals, such as page views, referring sites and countries, and we don't use them for advertising. If you don't allow it, Google Analytics isn't loaded at all. The site keeps a few small choices on your device. In cookies, for a year: your language, if you pick one (nz-locale), and your answer about analytics (nz-consent). In your browser's storage: light or dark, if you pick one (nz-theme), and, until you close the tab, that you closed the language suggestion. You can change your analytics answer at any time under Cookie settings at the bottom of every page. The site has no advertising and no social media trackers. ## Purchases Nonzero Pro is bought through the App Store or Google Play. Apple or Google takes the payment under your account with them; we never see your name, email address or card. To know whether you have Pro, the app uses RevenueCat. It receives an anonymous ID that the app creates and your purchase history from the store, never your habits. Restore purchases in Settings uses the same ID. ## Children Nonzero isn't aimed at children under 13. It never asks anyone for a name, an email address or other personal details. ## Changes If this policy changes, the date at the top changes too, and the change is described here. ## Contact Questions about privacy: kumbudev@gmail.com. --- Nonzero · https://nonzero.mse.today/en/privacy # Support Something not working, or a question the site doesn't answer? Write to us. A person reads every message. **Email kumbudev@gmail.com** ## Common questions ### How do I move to a new phone? Nonzero has no account, so nothing syncs by itself. In the app's settings, export your data to a file, move the file to your new phone, and import it there. ### I have Pro. How do I get it on a new phone? Sign in with the same Apple ID or Google account you bought it with, then tap Restore purchases in the app's Settings. ### I forgot to mark yesterday. Today and yesterday can still be changed. Open the day and mark it. Days before that are settled. ### My reminder doesn't arrive. Check that notifications are allowed for Nonzero in your phone's settings, and that a reminder time is set in the app. ### How do I cancel Pro? Cancel a yearly plan in your App Store or Google Play subscriptions. Pro stays until the end of the year you paid for. A one-time purchase has nothing to cancel. ### How do I delete my data? Delete the app. Everything it stored on your phone goes with it. We never receive your habits, though your phone's own backup may include them. Usage counts and crash reports are anonymous, so nothing in them leads back to you. If you bought Pro, the store and RevenueCat keep a record of the purchase, so Restore purchases still works on a new phone. ### I found a bug. Thank you. Email us what happened and which phone you use. A screenshot helps. --- Nonzero · https://nonzero.mse.today/en/support