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. 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.

Screenshots

目標達成くん3 screens
Challenge Log3 screens

Verdict

The call

The clearest difference is update cadence: Challenge Log at fortnightly against 目標達成くん's every 3 months. On price, ads, in-app purchases and device support 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 June 1, 2026 and August 22, 2026 respectively.

Scorecard1 real difference · 7 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
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.0 — better15.0
Further details — not scored
Size24 MB89 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?
Neither 目標達成くん nor Challenge Log shows ads.
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 June 1, 2026 and Challenge Log on August 22, 2026.

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