QuiTimer vs Challenge Log
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
QuiTimer
This app helps you quit bad habits and embrace a simpler life. Track your progress in quitting smoking, drinking, or other vices. Share your achievements with friends for added motivation and accountability.
- Quit habit management
- Progress tracking
- Share achievements
- Motivation through social sharing
- Support for a stoic lifestyle
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We support the realization of a simpler and more stoic life. The first step to challenge something is not to start something, but to quit something. No smoking, no drinking, no entertainment You can manage all your quits and know how long they last. By publishing the record to friends and SNS and creating a situation where others can see it You can get more motivation.
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
Verdict
The clearest difference is in-app purchases: Challenge Log at none against QuiTimer's 6. Challenge Log also leads on ads (none vs shown). QuiTimer's advantage is iOS requirement (12.0 vs 15.0). On price, update cadence 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
Both are free to download. QuiTimer sells 6 one-off in-app purchases. Challenge Log asks for nothing beyond the download.
QuiTimer ships an update monthly, Challenge Log fortnightly. The most recent releases landed on September 22, 2026 and August 22, 2026 respectively.
| Parameter | QuiTimer | Challenge Log |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (17 ratings) — better | — |
| Positive reviews | 56.5% of reviews | — |
| Number of ratings | 17 — better | — |
| Update frequency | Monthly | Fortnightly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 36 MB | 89 MB |
| Age rating | 4+ | 4+ |
| Developer | Ryosuke Nakamura | YOSHIKI KOKUBO |
In-app purchases
QuiTimer
- 250円分の決意$1.99
- 610円分の決意$4.99
- 1220円分の決意$9.99
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- 2440円分の決意$19.99
- 5140円分の決意$41.99
- 10000円分の決意$79.99
Challenge Log
No in-app purchases









