Habit challenges · 8 weeks to 12 months
The notebook challenge from your feed, made to actually work. Pick a plan, tick your boxes every day, and watch the streak, the charts and the new you build up.
8 plans for fat loss, muscle, discipline, study and more. Plus 75 Build, where you write your own rules.
How it works
Fat loss, muscle, discipline, study, calm, or Builder Mode for your side project. Choose 8 weeks, 3, 6 or 12 months.
Every rule is a box. Tap it, it's done. Add your own goal any day. Print the page if you like pen and paper.
Streaks, perfect days, a heatmap of the whole run, and which habit needs work. Weekly, monthly and overall.
Why it works
Every feature maps to a finding from behaviour research. No hype, just the mechanics.
In a UCL study, daily habits took 66 days on average to become automatic, with a range of 18 to 254. That's why 3 months is our recommended length.
Lally et al., 2010 ↗Deciding exactly when you'll act is one of the best-tested tools in psychology, with a medium-to-large effect across 94 studies. Inkstreak asks you to pick your time and signs it into your pledge.
Gollwitzer & Sheeran, 2006 ↗The same habit research found a single missed day barely changes the long-term result. Quitting after the miss is what does the damage. So we give you grace days instead of guilt.
What Lally's data shows ↗Researchers found people slack off when they're waiting for a "fresh start" date like Monday or New Year. Your plan starts the day you make it.
Koo, Dai et al. ↗The plans
Goal plans come in four lengths. The 96 Days Challenge is exactly 96 days. Every plan splits into four phases: Foundation, Build, Push, Lock-in. Prices are one-time.
3 MONTHS RECOMMENDED · ROOM FOR THE 66-DAY HABIT AVERAGE
Our take on 75 Hard
75 Hard hands everyone the same five rules. Most people don't need a gallon of water and two workouts. They need to fix their own three or four things. So we built that.
Progress
Most trackers stop at a checkmark. Inkstreak shows you the pattern: your best days, your weak habit, and how far you've come.
Print it
One tap gives you a handwritten-style A4 page for the day: your rules with empty boxes, score box, water glasses, mood, sleep and a line for today's win. Stick it on the fridge. Tick it with a real pen.
Journal
Every plan comes with a notebook. Six page types, typed on your phone in your pick of 7 handwriting styles, then printed on A4 for your wall or your desk.
Run a half marathon
Strong, lean, no back pain
Own our home
6 months saved
Side project pays
like a salary
Sunday trips
with the kids
Pricing
No subscriptions. Try the sample day first, then buy the plan you want or unlock everything.
Questions
Take the 30-second quiz. It asks what you want to change, what usually stops you and when you'll tick your boxes, then builds the plan for you with your name and finish date.
Complete every task, every day of your plan. If you're still not happy with your results at the end, we'll refund you in full. Your ticks in the app are the proof.
Yes. Open the sample day: tick boxes, add a goal, see the progress charts and print a page. Nothing in the sample is saved, so buy a plan when you're ready to track your own days.
No. It runs in your phone's browser. Add it to your home screen and it opens like an app.
On your phone straight away. Turn on cloud sync and you get a sync key. Enter that key on any other phone or laptop and your challenges and purchases come back.
You choose. Hard reset sends you back to Day 1. 3 grace days forgives three misses. Flex score never resets and just keeps your percentage honest.
Yes. Add a goal for every day from now, or just for one day. Remove a rule and your past ticks stay in your progress.
No. Every price is a one-time payment through Razorpay: UPI, cards or netbanking.
No. We're not doctors or certified trainers. Check with a professional before big changes to diet or exercise.
Day 1 is today