LockIn30 Tools
Free habit and challenge calculators that run entirely in your browser. No signup, no email — just answers.
General
- 100-Day Challenge Tracker Free online 100-day challenge tracker. Pick one habit, tick off all 100 days on the grid, and watch your completion rate. No signup, saves in your browser.
- 100 Days of Code Tracker: Free #100DaysOfCode Grid Free #100DaysOfCode tracker. Tick off an hour of code a day across a 100-day grid, log it in public, and watch your streak. No signup.
- 21-Day Habit Challenge Tracker Free online 21-day challenge tracker: one habit, a 21-day grid, and a live streak and completion rate. No signup, and progress saves in your browser.
- 30-Day Challenge End Date Calculator Put in your start date and how long you are running for. You get the finish date, the weekday it lands on, and the milestone dates in between.
- 30-Day Declutter Challenge Tracker Free 30-day declutter challenge tracker with a printable zone-by-zone schedule, item targets and time boxes, plus a 30-day grid you tick off daily.
- 30-Day Habit Challenge Tracker Free online 30-day habit challenge tracker. Pick one habit, check off all 30 days on the grid, and watch your completion rate. No signup, saves in your browser.
- 30-Day No Alcohol Challenge Tracker Free 30-day no alcohol challenge tracker. Tick off each alcohol-free day on the grid and watch your day count and completion rate climb. No signup needed.
- 30-Day No Sugar Challenge Tracker Free 30-day no sugar challenge tracker. Tick off four daily habits, fill the grid, and watch your streak and completion rate build. Saves in your browser.
- 30-Day Plank Challenge Tracker Free 30-day plank challenge tracker with the full hold schedule, 20 seconds to 5 minutes, four rest days, and a live streak. No signup needed.
- 30-Day Squat Challenge Tracker Free 30-day squat challenge tracker with the full rep chart, 50 squats up to 250, seven rest days, and a live streak. No signup, saves in your browser.
- 75-Day Hard Challenge Tracker Free 75-day hard challenge tracker. Tick off all five daily tasks, fill the grid, and watch your day count and completion percentage. Saves in your browser.
- Challenge Completion Rate Calculator Work out your completion rate from days done and days elapsed, then see your projected finish and how many days you can still miss and hit your target.
- 30-Day Challenge Ideas Generator Filter by category, effort level and minutes a day, then draw one 30-day challenge with a plain-English daily rule, three alternates, and your finish date.
- Challenge Start Date Planner Have a date to be ready by? Enter it with your challenge length to get the exact start date, days until you must start, and the longest run that fits.
- Daily Target Planner Calculator Enter a total and how many days you have. You get the number to hit each day, a weekly figure, rest-day adjustments, and a catch-up pace if you are behind.
- Habit Formation Timeline Calculator Estimate how many days until your habit runs on autopilot, based on the Lally UCL study median of 66 days and a realistic range either side.
- Habit Streak Calculator Enter your habit start date and the days you missed. Get your current streak, best streak, total days logged, and the date you hit your next milestone.
- No Spend Challenge Tracker Free no spend challenge tracker: tick off each clean day on a 30-day grid and watch your streak and completion rate. No signup, saves in your browser.
- Push-Up Challenge Plan Calculator Enter your max push-ups and a daily target to get a day-by-day ramp with sets per day, rest days, weekly totals, and the day you hit 100 push-ups.
- Pages Per Day Calculator to Finish a Book Free pages per day calculator to finish a book. Enter pages, date and reading speed for your daily target, minutes a day, and a catch-up pace.
- Screen Time Reduction Calculator Enter your current daily screen time and your target. Get a week-by-week taper, the hours you reclaim, and the date you hit the new limit.
- Streak Restart Date Calculator Broke your streak? See the finish date and the real cost of restarting from Day 1 versus extending the end versus just carrying on.