Don't break the chain.
A habit tracker should take five seconds a day and make the pattern impossible to ignore. Chain is a list you tick, a heat map you do not want a gap in, and numbers that do not flatter you.
WHAT IT DOES
- Habits that are daily, on chosen weekdays, or a target number of times per week
- Today list with a completion ring and a 14-day strip per habit
- Current streak and best streak, counted in days or in weeks for weekly habits
- Week grid to log any day, greyed where a habit is not due
- Year heat map per habit, GitHub style, with totals, best streak and completion rate
- Stats: all-time check-ins, 30 and 90-day completion, perfect days, best days of the week
- Sixteen icons, start dates, archive by deleting, backup and restore
Who it's for
Anyone building a routine who wants a desktop tracker that stays out of the way and keeps the data on their own machine.
What you get
- Chain (one .html file, runs in your browser, offline)
- A 2-page quick-start guide
Good to know
- One file. No install, no account, no subscription, no internet needed after download.
- Your data stays on your computer. Export a backup any time; import it on another machine.
- Built for a computer screen: Windows or Mac, in Chrome, Edge, Safari or Firefox.
- Instant download.
What's inside the download
- Chain.html
- Quick-Start-Guide.pdf
Made by Matthew Busel, a one-person studio in Tuckahoe, NY. About me. Questions: support@tensorust.com.
Home, family and school
Chain
habit tracker for your desktop: daily, weekly and N-times-a-week habits, streaks, a year heat map per habit, and honest stats
Tick habits off a clean daily list with a completion ring. Habits can be daily, on certain weekdays, or a number of times a week. Every habit gets a GitHub-style year heat map, a current and best streak, and completion rates over 30 and 90 days. A week grid lets you log or fix any day.
Works or I fix it. If a file doesn't open or work as described, email support@tensorust.com within 30 days and I fix it or send a working copy. All sales are final, so check the screenshots or ask first.
- Updated
- Oct 2026
- File
- ZIP, 195 KB: 1 HTML app, 1 PDF
- Who it's for
- Anyone building a routine who wants a desktop tracker that stays out of the way and keeps the data on their own machine.
One-time price in US dollars, checkout by Stripe. After paying you land on a page with your download link. Each link works for 15 minutes, and reopening that page makes fresh ones.
- Chain-Habit-Tracker.zip