Day 100: Fitness Challenge
100-day fitness challenges
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Pick a challenge. Check in daily. Watch your 10×10 grid fill up, one day at a time. Day 100 is where habits get built.
One challenge. 100 days. That's it.
Pick something simple — push-ups, a plank, a daily walk — or choose from over 40 bodyweight moves, and commit to it for 100 days. Day 100 gives you a 10×10 grid that fills as you go. Every check-in is a square. Every square is proof.
TRACK WHAT MATTERS
• The signature 100-day grid — your whole journey on one screen
• Daily check-ins with streaks that actually mean something
• Tap any past day to see what you did
REMINDERS THAT LEARN
Day 100 notices when you usually train and nudges you at the right moment — not at some arbitrary hour. Already checked in? No nag. Done is done.
SHARE THE JOURNEY
Every challenge gets a short day1.at link. Share Day 1. Share Day 50. Share the finish — or follow a friend's challenge and watch their grid fill up too.
DAY 100 PRO
• Run up to 3 challenges at once
• Grace days — repair a missed day and keep your streak alive
• AI training plans — a personal coach builds your next 100 days around your goals and fitness level
• 40+ additional exercises across core, glutes, legs and cardio
Pro is available monthly or yearly. The grid, daily check-ins, 6 free exercises, and one active challenge are free forever.
Day 1 starts now.
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Day 100 Pro is a monthly or yearly auto-renewing subscription. Payment is charged to your Apple ID at confirmation of purchase and renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings.
Terms of Use: https://day100.co/terms
Privacy Policy: https://day100.co/privacy
More ways to challenge yourself. Pick from 6 free exercises, or subscribe to Pro to unlock 40+ more — core, glutes, legs, cardio and full-body moves.
Follow your friends' progress. You can now follow another Day 100 user and watch their challenge progress alongside your own.
Also in this update:
• Clearer subscription terms, with easier access to Terms of Use & Privacy Policy
• General stability improvements
Thanks for building the habit with us.
The developer, Little Polar Apps Ltd, 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 Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Purchases
- Contact Info
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Little Polar Apps Ltd
- Size
- 49.3 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.6 or later.
- iPhone
Requires iOS 15.6 or later. - iPod touch
Requires iOS 15.6 or later. - Mac
Requires macOS 12.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contests
Contains
User-Generated Content
Health or Wellness Topics
Social Media
- In-App Purchases
Yes
- Day 100 Pro — Yearly $29.99
- Day 100 Pro — Monthly $3.99
- Copyright
- © Little Polar Apps Ltd
