66 Days vs COMPASS (콤파스)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
66 Days
This app helps you build lasting habits by encouraging daily repetition over a 66-day period. Set project-specific goals and track your progress with features like memos, photos, and notifications.
- 66-day habit building system
- Project-based goal setting
- Daily progress tracking
- Memo and photo recording
- Dark mode support
- Push notifications
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According to a landmark study by University College London (UCL), it takes an average of 66 days for a new behavior to become an automatic, lifelong habit. You don't need extreme willpower or superhuman effort. By repeating small, consistent actions every day, your brain naturally transforms them into effortless routines. 66 Days is designed to help you organize your life goals into actionable projects, maintain daily streaks, and conquer the 66-day milestone to transform your lifestyle. [ 66 Days Key Features ] 1. Project-Based Habit Building • Set meaningful goals like 'Lose 10 kg' or 'Read 20 Books' and attach daily micro-actions (e.g., 30 push-ups, read 15 mins). • Completing just one habit action per day keeps your streak alive! 2. Break Bad Habits & Quit Tracker • Track your clean streaks for quitting smoking, junk food, procrastination, or screen time. • Log reflections when overcoming cravings and watch your milestone gauges grow. 3. Insightful Analytics & Milestones • Visualize your consistency with heatmap calendars, weekly trends, and overall statistics. • Reach 66 days to enshrine your achievement in the permanent 'Success Collection' and unlock badges. 4. Personalized Cards & iOS Widgets • Customize each habit card with custom photos, elegant color palettes, and blur themes. • Stay on top of your daily routines directly from your Home Screen with beautiful widgets. 5. Privacy & Biometric Lock • Keep your personal habit journal safe with Face ID and Touch ID biometric locking. 6. Lifetime Access & Premium • Unlock all premium features permanently with a single one-time purchase—no subscription stress. Start today. In 66 days, you will meet a completely new version of yourself! Terms of Use (EULA): https://66days.epipherse.com/terms/ Privacy Policy: https://66days.epipherse.com/privacy/
COMPASS (콤파스)
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COMPASS는 내 삶의 반경 가까이에 있는 거점 오피스입니다. COMPASS 앱으로 내가 일하고 싶은 장소와 시간, 내 몸에 맞는 데스크와 의자까지 선택하세요. 나를 중심으로 설계 된 업무 공간에서 일과 삶의 FLOW를 찾아보세요. FIND YOUR FLOW @ COMPASS ■ 홈 IoT 센서로 COMPASS 공간의 쾌적함을 관리하고 있어요. 홈에서 바로 볼 수 있는 나의 예약 카드를 클릭해서 공간의 온습도를 비롯한 공간 관리 현황과 지금 나오는 음악까지 확인해 보세요. ■ 좌석 & 회의실 예약 좌석과 회의실을 필요한 만큼 예약해 보세요. 상세 정보 보기로 예약 전에 어떤 공간인지 미리 알 수 있어요. 회의실 예약을 하면서 방문자를 쉽고 빠르게 초대할 수 있습니다. ■ 스튜디오 & 클래스 예약 2가지 컨셉의 스튜디오, 그리고 클래스를 예약할 수 있어요. 가까운 곳에서 휴식과 여가를 즐겨보세요. ■ VOC 쉽고 빠르게 요청사항을 남길 수 있어요. 오피스 이용부터 App 사용까지 한 페이지에서 도움을 요청해 보세요. 더 나은 COMPASS를 위한 제안도 남길 수 있습니다. ■ 멤버 전용 혜택 COMPASS 멤버들만 이용할 수 있는 이벤트가 준비되어 있어요. 다양한 제휴할인 및 특별혜택을 이용해 보세요. 지금 일이 잘 되는 경험을 시작해보세요.
Screenshots
Verdict
The clearest difference is in-app purchases: COMPASS (콤파스) at none against 66 Days's 5. COMPASS (콤파스) also leads on iOS requirement (13.0 vs 18.0). On price, update cadence, ads 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. 66 Days sells 5 in-app purchases, starting at $1.99 per month. COMPASS (콤파스) asks for nothing beyond the download.
66 Days ships an update every 3 weeks, COMPASS (콤파스) every 2 weeks. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.
| Parameter | 66 Days | COMPASS (콤파스) |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (9 ratings) — better | — |
| Positive reviews | 72.9% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Every 3 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 18.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 19 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | Epipherse | HDC Labs Co., Ltd. |
In-app purchases
66 Days
- Premium 1 Month$1.991 Month
- Premium 3 Month$4.993 Months
- Premium 1 Year$9.991 Year
- Project Streak Recovery$2.99
- Premium Lifetime$22.99
COMPASS (콤파스)
No in-app purchases









