Your first attempts will suck. So will your tenth. That's the point. See what happens at 100.
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THE PROBLEM
The world's most popular coding challenge. Code for at least an hour every day for 100 days straight.
Transform your fitness one workout at a time. 100 sessions builds the habit that lasts a lifetime.
Build your writing habit and online presence. Your first posts won't be perfect, but by 100 you'll have found your voice.
FEATURES
Choose your format. Track 100 reps of your craft or commit to 100 consecutive days. Perfect for "100 days of code", "7 days of songs", or any challenge format that works for you.
One tap to log a rep or mark a day complete. No forms, no overthinking. Just mark it done and move on. The faster you can log, the more likely you'll keep going.
Track as many challenges as you want simultaneously. 100 songs, 100 workouts, 100 posts. All in one place.
Watch your bar fill from 0 to 100. Unlock milestone badges at 10, 25, 50, 75, and 100. See exactly how far you've come.
See your streaks, average reps per week, and improvement rate. Know when you're on fire and when you need to push harder.
Join or host community challenges. Compete, support each other, and hold yourself accountable with others doing their 100.
Attach files to each rep. Upload designs, code, writing, or photos to see your progression from rep 1 to 100. Compare your first attempt to your latest work.
Auto-generate beautiful progress cards. Share to Twitter, Instagram, LinkedIn, Facebook, and TikTok with one click. Track which reps you've shared and where. Never forget if you posted about rep #47.
HOW IT WORKS
Choose what you want to master. Whether it's making music, writing, coding, or fitness. Choose your format: track 100 iterations (reps) or commit to 100 consecutive days. Whatever works for your challenge.
Each time you complete a rep, mark it down. No need to track time, quality, or details. Just the act of doing it. The data shows you're making progress, even when it doesn't feel like it.
Hitting 100 is hard. That's why we celebrate the journey. Unlock badges at 10, 25, 50, 75, and 100. Share your progress with friends and prove you can finish what you started.
USE CASES
Your first beats will be rough. Your first lyrics won't rhyme. That's normal. By 100 tracks, you'll have developed your sound, learned your tools, and built a catalog worth sharing.
Every great writer started with bad drafts. The key is volume. Write 100 articles, essays, or stories. By the end, you'll have clarity, confidence, and an audience.
Build 100 projects. Ship 100 features. Design 100 screens. Repetition reveals patterns, builds intuition, and separates beginners from experts.
One workout won't change you. But 100 will. Whether it's running, lifting, or yoga. Track your progress and watch your body transform through consistency.
Start tracking immediately. No signup required. Create an account later to save your progress.