30d - Custom 30 days challenge
Habit Tracker & Daily Streak
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Pick one habit. Show up for 30 days. Daily reminders, streak tracking & a private photo journal — all in one calm, beautiful app. Your future self starts here.
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. Beginners who want a calm tracker — and athletes, creators and founders who want a clean streak app without gamification noise.
— THE PROMISE —
You don't need 100 habits. You need one — done 30 times.
Pick yours. We'll handle the reminders, the streak, the journal, the milestones.
Day 1 starts now.
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The developer, GRAINES, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
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Information
- Seller
- GRAINES
- Size
- 2.1 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © Graines 2026