AnyTool
Your files never leave your device. All processing happens locally in your browser.

How do I track daily habits and build streaks?

Open AnyTool Habit Tracker, add a habit with a name, colour and schedule (every day or specific weekdays), then check it off each day. Every completed day links into a chain — the “don’t break the chain” method — and the tool computes your current streak, your longest streak ever and a 30-day completion rate. Switch between a Today checklist, a 7-day Week grid you can click to mark past days, and a GitHub-style Month heatmap that fills in darker as you keep going. Everything is saved only in your browser’s localStorage, and you can export or import your whole history as JSON.

  • Add habits with a colour, a schedule (daily or chosen weekdays) and an optional daily target
  • Current streak, longest streak and rolling completion % that respect the schedule
  • Three views: Today checklist, Week grid (click any day) and Month heatmap
  • Export / import all habits and history as JSON for backup or moving devices
  • Saved only in your browser’s localStorage — nothing is uploaded, no account, no tracking

What is

Habit tracker (don’t break the chain)

A habit tracker is a tool for recording whether you completed a recurring habit each day so you can build consistency over time. The most popular method is “don’t break the chain”, popularised by Jerry Seinfeld: every day you do the habit you mark the day, the marks join into a chain, and your only job is not to break it. A streak is the number of consecutive scheduled days you have completed; the visible, growing chain creates a small daily win and a sense of loss aversion that helps motivation. Good trackers also show a longest-streak record, a completion rate, and a calendar or heatmap so patterns are easy to see, and they let habits run on a custom schedule (for example only on weekdays) so days the habit isn’t meant for don’t count against you.

Generators

Related terms

StreakDon’t break the chainHabit stackingCompletion rateHeatmapRoutine

Frequently Asked Questions

The current streak counts consecutive scheduled days you completed, ending today — or yesterday if today isn’t marked yet, so an un-checked today doesn’t break it.

The current streak walks backwards from today, counting each consecutive scheduled day you have completed and stopping at the first scheduled day you missed. If today is a scheduled day but you haven’t marked it done yet, counting starts from yesterday so a not-yet-checked today never shows your chain as broken before the day is over. Days the habit isn’t scheduled for — say weekends for a weekday habit — are simply skipped, so they neither extend nor break the streak. The tool also records your longest streak ever by scanning your whole history, and a rolling completion rate of completed versus scheduled days over the last 30 days.

Yes. Every habit and its full history are stored only in your browser’s localStorage and never uploaded — there is no account and no tracking.

AnyTool Habit Tracker is 100% client-side. Your habits, their colours and schedules, and every day you have checked off live only in this browser’s localStorage and are never sent to a server. There is no sign-up, no login and no analytics, and the streaks, week grid and month heatmap are all computed locally on your device. It works offline once the page is cached. Because the data is tied to this browser, you can use Export JSON to keep a backup or move your habits to another browser or device, and clearing your browser data is the only thing that removes your history.

Yes. Each habit has a schedule — daily, weekdays, weekends or any custom set of days — and an optional daily target so it counts as done only after N times.

When you add a habit you choose a schedule: every day, weekdays, weekends, or any custom selection of weekdays. The schedule decides which days count toward your streak and completion rate, so a Monday/Wednesday/Friday habit isn’t penalised for the weekend. You can also set a daily target greater than one — for example eight glasses of water — and a day only counts as done once you reach the target; each tap on that day adds one and the month heatmap shades the cell darker as the count rises. You can change a habit’s colour, rename it, reorder it and delete it at any time.

No. It is a personal single-device tracker with no cloud sync and no reminders — keep the tab or a bookmark and check in daily, and export JSON to back up or move devices.

Because everything is stored locally in this browser, there is no cloud sync between devices and no push notifications or reminders. Keep the tab open or bookmark the page and check in each day yourself. Your data stays in this browser on this device, so opening the tool in a different browser, on another device or in private/incognito mode starts fresh, and clearing browser data erases your history. To keep a backup or move to another device, use Export JSON and then Import it, which can either replace your current habits or merge the imported ones alongside them.

Detailed Explanation

Methodology

How Streaks and Completion Rates Are Computed

AnyTool Habit Tracker uses the “don’t break the chain” method: each habit keeps a log keyed by the local calendar date (YYYY-MM-DD), and a day is “done” when its logged count meets the habit’s daily target (target one means a simple done/not-done). The current streak walks backwards from today, counting consecutive scheduled days that are done and stopping at the first scheduled miss; if today is scheduled but not yet marked, counting begins from yesterday so an un-checked today never shows the chain as broken before the day ends. Days the habit isn’t scheduled for are skipped — they neither extend nor break the streak — so a Monday/Wednesday/Friday habit is not penalised for the weekend. The longest streak scans the whole log from the earliest done date to the latest, tracking the best run of consecutive scheduled-and-done days. The completion rate is done divided by scheduled days over a rolling window (30 days), never counting dates before the habit was created. All date maths use plain local-time Date objects so there are no timezone surprises.

  • Per-habit log keyed by local date; a day is done when its count meets the daily target
  • Current streak = consecutive scheduled done days back from today (or yesterday if today is unmarked)
  • Un-scheduled days are skipped — they never extend or break a streak
  • Longest streak scans the full history for the best run of scheduled-and-done days
  • Completion % = done / scheduled over the last 30 days, ignoring pre-creation dates
How It Works

Today, Week Grid and Month Heatmap

The tracker offers three views over the same data. Today shows each habit as a card with a large toggle to check it off, its live current streak, its schedule, and an indicator when a habit isn’t scheduled for the current day; a count habit shows progress like 3/8 and each tap adds one. The Week grid lays out habits as rows against the last seven days as columns — clicking any cell toggles that day, so you can fill in days you forgot, with today ringed and a per-row streak shown on the right. The Month view is a GitHub-contributions-style heatmap per habit: a calendar grid where done days are shaded in the habit’s colour and, for count habits, darker as the count approaches and passes the target; future days are disabled, today is outlined, and you can page back through previous months. A top progress ring summarises how many of today’s scheduled habits are done, and a stats strip shows the best current streak, the longest streak ever, the average 30-day completion across habits, and total all-time check-ins.

  • Today: big per-habit toggle, live streak, schedule label, and count progress (e.g. 3/8)
  • Week grid: habits × last 7 days, click any cell to toggle, today highlighted, per-row streak
  • Month heatmap: per-habit calendar shaded by completion/intensity, navigable by month
  • Progress ring for today plus stats for best current, longest, 30-day % and total check-ins
  • Add a daily target for count habits; cells darken as the count rises toward target
Privacy & Security

Privacy, Backups and Honest Limits

Everything runs locally in the browser with no account, server or tracking. Every habit — its name, colour, schedule, target and full day-by-day history — is stored only in the browser’s localStorage and is never uploaded, and the page works offline once cached. You can export all habits and history to a JSON file as a backup or to move to another browser or device, and importing can either replace your current habits or merge the imported ones alongside them. Honestly, this is a personal single-device tracker: because the data lives in localStorage there is no cloud sync between devices and no reminders or push notifications, so you keep a tab or bookmark and check in daily yourself; opening the tool in a different browser, on another device, or in private/incognito mode starts fresh, and clearing browser data erases your history — which is why exporting a JSON backup regularly is recommended. On streaks themselves, the chain is a useful nudge but a single missed day isn’t a failure; setting an accurate schedule means the streak only counts the days the habit is actually meant for.

Habit Tracker: in-browser (AnyTool) vs typical habit-tracking apps
CapabilityAnyToolTypical habit-tracker apps
Where data livesOnly in your browser’s localStorageUsually a cloud account / server
StreaksCurrent + longest, schedule-awareCurrent streak; often daily-only
SchedulesDaily, weekdays, weekends or custom daysSometimes daily-only or paid
ViewsToday, week grid + month heatmapVaries; heatmaps often premium
BackupExport / import JSON of all historyTied to the account/cloud
PrivacyNothing uploaded, no account, no trackingSign-in and sync to a server
Cost / signupFree, no signupOften app install or paid tier

AnyTool stores every habit and its history locally and uploads nothing; export JSON to back up or move devices.