Comparison

Challenge Log vs WUZU

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Challenge Log

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Small wins, every day. Challenge Log is a gentle stamp-based app for recording your daily study, work, and habits. [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. Stamps From Your Photos: Turn a photo from your camera or photo library into a round stamp, give it a name, and use it again and again (sign-in required to create). Photo stamps appear in shared calendars, but are not posted to the community feed. Warm & Cool Themes: Switch between the warm-toned "Warm" and cool-toned "Cool" palettes to match your mood or the season. A Clear 4-Tab Layout: Home / Timer / Community / My Page. 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 six-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 Notification Settings on My Page. Calendar Sharing: Share challenges with friends and cheer each other on. Community: Turn on "Show my records to everyone" in Settings and the records you save from then on appear next to other people's stamps. No name and no date are shown, shared records remain visible until you make them private, and you can report or block anything you would rather not see. A badge on the Community tab lets you know when there's something new, and records you haven't seen are marked "Unread". The Community tab can be turned off in Settings. Cheers: Send a hanamaru, star, thumbs-up or heart to the people you share your calendar with. Share Your Stamp Book: Turn this month's calendar into a single image and share it in square or stories size. 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 - Want a little push from seeing how others are doing - 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.

About

WUZU

Features
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Journaling doesn't have to be lonely. WUZU is a creature who journals with you. No blank pages, no pressure—just a conversation with a friend who remembers your WUZU requires a subscription to access all features. Subscription plans are available as monthly, and yearly options. Pricing details are shown in the app before purchase.story. ◆ TALK, DON'T WRITE WUZU asks, you answer. Journaling becomes as easy as chatting. ◆ UNDERSTAND YOUR EMOTIONS See your feelings mapped in 3D—energy, mood, and control. Tap any point to revisit that day. ◆ FIND YOUR GRATITUDE Just talk about your day. WUZU spots what you're thankful for. ◆ ABSOLUTE PRIVACY End-to-end encrypted. Only you can read your entries. ◆ SHARE ANONYMOUSLY Let your story reach someone who needs it. Leave kind words for strangers. No names, just warmth. ◆ TRACK YOUR JOURNEY Streaks, milestones, and insights. When you're down, look back at how far you've come. A few minutes a day with WUZU. He'll remember. So will you. https://www.apple.com/legal/internet-services/itunes/dev/stdeula

Screenshots

Challenge Log4 screens
WUZU4 screens

Verdict

The call

The clearest difference is in-app purchases: Challenge Log at none against WUZU's 2. WUZU's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. WUZU sells 2 in-app purchases, starting at $2.99 per month. Challenge Log asks for nothing beyond the download.

UpkeepUpdate frequency

Challenge Log ships an update fortnightly, WUZU weekly. The most recent releases landed on October 30, 2026 and October 26, 2026 respectively.

Scorecard2 real differences · 4 level
Challenge Log versus WUZU: the parameters behind the verdict, then further details
ParameterChallenge LogWUZU
PriceFreeFree
Update frequencyFortnightlyWeekly — better
AdsYesNo — better
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size91 MB99 MB
Age rating4+17+
DeveloperYOSHIKI KOKUBOchung-Ying Xie

In-app purchases

None

Challenge Log

No in-app purchases

2 purchases

WUZU

Subscriptions2
  • Monthly Pro7 Days trial$2.991 Month
  • Annual Pro$29.991 Year

Questions

Is Challenge Log free?
Challenge Log is free to download, with no in-app purchases.
Is WUZU free?
WUZU is free to download, with in-app purchases available.
Do Challenge Log or WUZU have ads?
Challenge Log shows ads; WUZU does not.
Which is updated more often, Challenge Log or WUZU?
Challenge Log ships an update fortnightly, and WUZU weekly. Most recently, Challenge Log was updated on October 30, 2026 and WUZU on October 26, 2026.

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