
Challenge Log - チャレンジログ -
Stamp your small daily wins.
0 ratings
Free
About
Small wins, every day.
Challenge Log is a gentle stamp-based app for recording your daily study, work, and habits. With this major rebrand, both the look and the feel have been reborn.
[Key Features]
New Type x 3-Grade Stamps: Combine 6 types (Face, Hand, Aco, Hanamaru, Star, Flower) with 3 grades (Great, Good, A Little). You'll always find the right stamp for the day.
Warm & Cool Themes: Switch between the warm-toned "Warm" and cool-toned "Cool" palettes to match your mood or the season.
Simpler 3-Tab Home: Home / Timer / My Page — a cleaner flow. Tap any date on the calendar to open the record sheet directly.
Inline Monthly Summary: Stamp and timer breakdowns are always visible on the Home screen.
Onboarding for First-Timers: A five-page intro tour on first launch. Press a stamp yourself and get a feel for the app right away.
Easy Login: Quick sign-in with Google or Apple. No tedious registration required.
Record Without Sign-In: Save records locally without an account. Link to an account later to sync to the cloud.
Larger Calendar Stamps: Each day's stamp is displayed larger, so your month's progress is easy to see at a glance.
Timer Function: Set a time and focus. The screen stays on while running, with a reset confirmation dialog for peace of mind.
Reminder Notifications: Set daily, weekly, monthly, or custom-interval reminders. Manage them all from Notifications on My Page.
Calendar Sharing: Share challenges with friends and cheer each other on.
Rename Your Stamps: Customize stamp-type names to make them your own.
Reorder Your Stamps: Rearrange stamp types from Settings and put your favorites right up front.
Profile Setup: Set a username and avatar to personalize your experience.
No Goals, No Penalties: No quotas, no deadlines. Focus on just showing up.
Daily Memos: Freely jot down notes, insights, or how you feel.
App Notices: Timely updates on app news and consistency tips.
Cloud Backup: Sign up to save records securely in the cloud. Migration between devices is easy.
Multi-language: available in 15 languages — Japanese, English, Korean, Simplified Chinese, Traditional Chinese, German, French, Spanish, Portuguese (Brazil and Portugal), Italian, Dutch, Indonesian, Vietnamese and Thai.
[Recommended if you...]
- Want to quit being a "quitter"
- Want a gentle-looking app you'll actually want to open
- Want to build habits with friends
- Dislike strict goal management or penalties
- Want to try the app first without signing in
- Want a theme you can switch by mood
Start today — capture your "I did it" days with your favorite stamps.
Show more
What's New in Challenge Log
2.1.0
August 20, 2026
Challenge Log now speaks 15 languages. • Added German, French, Spanish, Portuguese, Italian, Dutch, Indonesian, Vietnamese, Thai and Traditional Chinese • The app now follows your device language automatically • App name, notifications and error messages are localised too • You can now pick "System default" in Settings
More

