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 progress percentage. 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 the grid fill in. No signup.
- 21-Day Habit Challenge Tracker Free online 21-day challenge tracker: one habit, a 21-day grid, and a progress percentage that updates as you tick days off. No signup, saves in your browser.
- 30-Day Ab Challenge Tracker Free 30-day ab challenge tracker with a day-by-day chart of crunches, dead bugs, bird dogs and planks, 8 rest days, and a grid that 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 Gratitude Challenge Tracker Free online 30-day gratitude challenge tracker. Write three good things a day, check off the grid and watch your progress percentage. No signup, saves locally.
- 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 progress build. 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 progress percentage 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 progress percentage 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 day grid you tick off. 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 tick-off day grid. No signup, saves in your browser.
- 30-Day Wall Sit Challenge Tracker Free 30-day wall sit challenge tracker. A day by day hold time chart that climbs from 20 seconds to two minutes, plus a 30-day grid you tick off.
- 30-Day Workout Challenge Tracker Free 30-day workout challenge tracker for any routine. Tick off 22 training days and 8 planned rest days on one grid. No signup, saves in your browser.
- 52-Week Savings Challenge Tracker Free 52-week savings challenge tracker. Set your first deposit and weekly step, tick off each week, and see your running total. 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.
- 75 Soft Challenge Tracker Free 75 Soft challenge tracker. Tick the four daily rules, fill the 75-day grid, watch your progress percentage. Miss a day, keep going. 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.
- Dry January Money Saved Calculator Free Dry January money saved calculator. Enter drinks per week and cost per drink to see money saved, calories avoided, drinks skipped, and a yearly total.
- 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 progress percentage climb. No signup, saves in your browser.
- Progress Photo Timelapse Calculator Work out how long your daily progress photo timelapse runs at any frame rate, how many days of photos a target length needs, and the frame rate that fits.
- 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.