Comparison

目標達成くん vs Challenge Log

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

Head to head
About

目標達成くん

Features
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目標達成くんは、自身の目標、過去に達成した目標を管理するためのアプリです。 過去に達成し終えた目標に取り組んだ期間をカレンダーで視覚的に見ることができます。 また、ホームにウィジェットを追加することもでき、目標をいつでも見ることができます。 そのため、簡単に今の自身の目標をいつでも確認することができます。 ■目標達成くんの特徴 ・達成するための目標を設定することができます ・目標を宣言した日付を確認することができます ・ホーム画面で設定した目標をいつでも確認することができます ・過去に達成した目標とその取り組んだ期間をカレンダーで管理することができます ■機能 ・目標、目標宣言日の保存機能 ・カレンダーを使用した過去の目標の管理機能 ■こんなときに役立つ! ・日々の達成したい目標をいつでも確認できるようにしたい。。 ・自分が過去にどのような目標に取り組んだのか知りたい。。 日々の達成したい目標をいつでも確認、また過去の目標とその取り組んだ期間をカレンダーで視覚的に管理したい人にはぜひおすすめのアプリです。

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.

Screenshots

目標達成くん3 screens
Challenge Log4 screens

Verdict

The call

The clearest difference is ads: 目標達成くん at none against Challenge Log's shown. Challenge Log's advantage is update cadence (fortnightly vs every 3 months). On price, in-app purchases, 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

目標達成くん ships an update every 3 months, Challenge Log fortnightly. The most recent releases landed on October 12, 2026 and October 6, 2026 respectively.

Scorecard2 real differences · 6 level
目標達成くん versus Challenge Log: the parameters behind the verdict, then further details
Parameter目標達成くんChallenge Log
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.0 — better15.0
Further details — not scored
Size24 MB91 MB
Age rating9+4+
DeveloperHayato KitaokaYOSHIKI KOKUBO

In-app purchases

None

目標達成くん

No in-app purchases

None

Challenge Log

No in-app purchases

Questions

Is 目標達成くん free?
目標達成くん is free to download, with no in-app purchases.
Is Challenge Log free?
Challenge Log is free to download, with no in-app purchases.
Do 目標達成くん or Challenge Log have ads?
Challenge Log shows ads; 目標達成くん does not.
Which is updated more often, 目標達成くん or Challenge Log?
目標達成くん ships an update every 3 months, and Challenge Log fortnightly. Most recently, 目標達成くん was updated on October 12, 2026 and Challenge Log on October 6, 2026.

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