30d - Custom 30 days challenge

30 days. One habit. Everything changes.

ThirtyDays is the calm, beautiful way to actually finish a 30-day challenge. Pick one habit, show up every day, and watch a streak — and a new identity — quietly build.

No feeds. No streak shaming. No 47 things to track at once. Just one challenge, one daily check-in, and the science-backed window your brain needs to rewire.

— WHAT YOU GET —

• ONE ACTIVE CHALLENGE — radical focus. Finish it, then start the next.
• DAILY CHECK-IN — log a photo, a thought, or just tap done.
• SMART REMINDERS — a single nudge at the time you choose.
• REAL STREAK MATH — a missed day breaks the streak but never the challenge. Keep going.
• MILESTONE MOMENTS — celebration notifications on days 7, 15, 21 and 29.
• PRIVATE PHOTO JOURNAL — your 30-day story in pictures, saved to your iCloud.
• GORGEOUS DESIGN — animated cloudy gradients, glass surfaces, SF Pro typography. Built natively for iOS 26.

— CHALLENGES PEOPLE ACTUALLY DO —

Running · Gym · Drink 2L water · Cold showers · Eat clean · Sleep 8h
Meditation · Reading · Journaling · No social media · Gratitude · Breathwork
Drawing · Guitar · Coding · Writing · Language learning · Piano
Wake early · No alcohol · Cook at home · 10k steps · Declutter

…or build your own. If you can do it once a day, you can run a 30-day challenge with it.

— THE SCIENCE —

Neuroscience shows consistent daily reps rewire your brain in 21–66 days. Thirty is the sweet spot: long enough to make it real, short enough to actually finish.

— WHY THIRTYDAYS, NOT ANOTHER HABIT TRACKER —

• One habit at a time. Trying to fix everything at once is how you fix nothing.
• Calendar-day check-ins (00:00–23:59) — no anxious rolling 24-hour windows.
• Your longest streak is saved on every run, even if a day slips.
• No accounts. No feeds. No social scores. No ads. Ever.
• Built native in SwiftUI for iOS 26 — fast, fluid, light on battery.

— PRIVACY FIRST —

Your photos, reflections and progress live in your iCloud, not on our servers. No sign-up. No analytics. No tracking. The app simply works for you.

— WHO IT'S FOR —

People who keep starting things and stopping. Anyone who wants to build a fitness habit, meditate daily, finally read more, learn a language, quit a vice, or prove to themselves they can finish something hard.