StackDays: Habit Tracker
Build streaks with friends
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
A fresh new look: six accent colours, a redesigned streak calendar and a Liquid Glass tab bar. Monthly and yearly plans start with a 3-day free trial.
StackDays is the habit tracker you actually stick with, because you're not doing it alone. Build daily habits, grow your streak one day at a time, and keep your friends accountable right alongside you.
Whether you want to drink more water, read every night, train for a race, meditate, study or just build a better routine, StackDays turns small daily wins into a streak you won't want to break.
STACK YOUR DAYS
- Check off habits in one tap and watch your streak grow
- Track anything: a simple daily check-in, or a number like kilometres, minutes, reps, pages or glasses of water
- Every day, a few times a week or a few times a month: set the schedule that fits
- Give each habit its own goal, colour and emoji
- Forgot to log yesterday? Tap the day and fix it
- Drag to reorder your habits and Home sections
STAY ACCOUNTABLE WITH FRIENDS
People follow through far more often when someone is watching. StackDays makes that visible every day.
- Add friends with a simple invite code and see each other's streaks
- Run challenges together with shared habits, a start and end date, and a live leaderboard
- Team chat inside every challenge
- Get a nudge when a friend passes you
SEE YOUR PROGRESS
- Day, week and month views of everything you log
- A 12-week consistency heatmap
- Your strongest and weakest weekdays
- A calendar for every habit that shows your streaks as connected runs
- Monthly completion trends
- Printable PDF months and shareable streak cards
PROTECT YOUR STREAK
- Streak powers rescue a missed day (three new ones every month)
- Vacation mode pauses everything while you're away
- Habit reminders at the times you choose
- A heads-up before a streak you've earned is at risk
CELEBRATE MILESTONES
Badges and milestone ladders unlock as your streaks grow, from your very first day onwards.
MAKE IT YOURS
- Light, dark or automatic theme
- Six accent colours, or pick your own
- Four text sizes and optional haptics
- Apple Health sync for steps, distance and workout minutes
PRIVATE BY DESIGN
No ads, and your data is never sold. Export your months as PDF, or delete your account whenever you like.
ONE PLAN, EVERYTHING INCLUDED
StackDays is one subscription with every feature. Monthly and yearly plans start with a 3-day free trial: cancel before it ends and you won't be charged. A one-time lifetime purchase is also available. Payment is charged to your Apple Account when you confirm the purchase, or when the trial ends. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel any time in your App Store account settings.
Terms of Use (EULA): https://stackdays-efb6b.web.app/terms.html
Privacy Policy: https://stackdays-efb6b.web.app/privacy.html
Stack up your days, one habit at a time.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
A faster, safer StackDays:
- A redesigned Settings screen that opens with your profile, avatar and friend code
- Reporting a message in team chat now works properly
- Habit reminders no longer keep arriving after you sign out
- Prices and free-trial details now come straight from the App Store, in your own currency
- Stats, Badges and Milestones load noticeably faster
- Security and privacy hardening throughout
The developer, RHH LLC, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Purchases
- Contact Info
- User Content
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- RHH LLC
- Size
- 101.8 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.3 or later.
- iPhone
Requires iOS 15.3 or later. - iPod touch
Requires iOS 15.3 or later. - Mac
Requires macOS 12.2 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Infrequent
Contests
Contains
Messaging and Chat
User-Generated Content
- In-App Purchases
Yes
- Lifetime Pro $59.99
- Annual Pro $24.99
- Monthly Pro $2.99
- Copyright
- © 2026 RHH LLC