렘수면 vs Exam Countdown & Study Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
렘수면
Read full descriptionHide full description
오늘 밤, 가장 개운하게 일어날 수 있는 시간을 알려드립니다. 수면 사이클에 맞춰 취침 시간과 기상 시간을 계산해주는 똑똑한 수면 도구입니다. 사이클이 끝나는 시점에 깨면 수면 관성이 줄어들어 같은 시간을 자더라도 훨씬 개운하게 일어날 수 있습니다. 복잡한 설정 없이, 시간 하나만 입력하면 됩니다. 주요 기능 [취침 시간 계산 (역산)] - 내일 일어날 시간을 입력하면 추천 취침 시간 표시 - 3~6사이클 기준으로 최적의 취침 시간을 안내 [기상 시간 계산 (정산)] - 지금 자려는 시간을 입력하면 추천 기상 시간 표시 - 사이클별 기상 시간과 총 수면 시간을 한눈에 확인 [지금 자기] - 버튼 한 번으로 현재 시각 기준 추천 기상 시간 즉시 표시 - 입면 시간을 자동 반영하여 정확하게 계산 [알람 바로 설정] - 추천 시간을 탭하면 시스템 알람으로 바로 설정 - 계산에서 알람까지 한 번에 완료 [사이클 길이 조정] - 기본 90분이지만, 70~120분 범위에서 본인에 맞게 조정 가능 - 실제 수면 사이클은 개인마다 다르기 때문에 직접 조정하면 더 정확 [입면 시간 조정] - 잠드는 데 걸리는 시간을 5~30분 범위에서 설정 - 본인의 입면 패턴에 맞춰 더 정확한 계산 가능 이런 분들에게 추천합니다 - 아침마다 알람에 멍해서 고생하는 직장인 - 짧게 자더라도 효율적으로 자고 싶은 학생 - 수면 시간은 충분한데 피곤한 이유가 궁금한 분 - 과학적 근거를 바탕으로 수면을 관리하고 싶은 분 왜 렘수면인가요? - 정직한 과학: 90분 사이클의 한계를 솔직하게 알려드립니다. 실제 연구에 따르면 수면 사이클은 70~130분까지 변동합니다. 이 사실을 숨기지 않고 사이클 조정 기능으로 보완합니다. - 한국어 우선 설계: 번역체 없는 자연스러운 한국어 UX - 계산에서 알람까지 원스톱: 결과 화면에서 바로 알람 설정 - 감성적 디자인: 차가운 의학 앱이 아닌, 따뜻한 밤하늘 컨셉 - 광고 없는 깔끔한 경험: 수면을 방해하지 않습니다 지원 언어 한국어 문의 및 피드백 이메일: jinhom6225@insightmyung.com 여러분의 피드백이 더 나은 앱을 만듭니다. 평점과 리뷰를 남겨주시면 큰 힘이 됩니다! 이 앱은 의학적 조언을 제공하지 않습니다. 심각한 수면 문제는 전문의 상담을 권장합니다.
Exam Countdown & Study Timer
This app helps you track exam dates, plan study sessions, and monitor your progress. It offers a countdown clock, a study timer with Pomodoro support, and detailed history logs to visualize your learning journey.
- Countdown clock for exams and deadlines
- Study planner with color-coded subjects and tasks
- Live study time tracking with a timer
- Pomodoro focus timer
- Detailed study history and progress visualization
- Exam-style timer for timed practice
- Data backup and export
Read full descriptionHide full description
Keep the countdown to your exam in sight every day, and bring planning, study-time tracking and focus together in one place. Stand the device on your desk and it works as an always-on countdown clock. Entrance exams, professional qualifications, civil service tests, long studies in accounting or law, job-hunting deadlines: it adapts to your goal. COUNTDOWN CLOCK A large analog clock with the digital time and a days-left counter in bold flip-style digits that stay readable from across the room. The date is always calculated from the current time, so the number stays correct after the app sits untouched or the day rolls over. MULTIPLE GOALS Alongside your main exam, add backup exams, mock-test dates and job-hunting deadlines. Each goal takes a type and a colour, and the clock shows the nearest one automatically. STUDY PLANNER Create colour-coded subjects and list tasks with due dates. The screen splits into Today and Upcoming, so it is clear what to work on now. Tasks can be grouped by goal, overdue ones are flagged by colour, and when today is done the app points to what comes next. TRACK STUDY TIME Enter the minutes by hand, or measure them live with the study timer. It counts upward while the current time and the days left stay on screen. Pause and resume freely; it auto-stops after a long stretch so a forgotten timer cannot ruin your record. Timing uses real elapsed time, so it stays accurate with the screen off. FOCUS WITH POMODORO A mode that alternates focused work with short breaks and signals each turn. The time you focus is added straight to your record. LOOK BACK ON WHAT YOU DID When you log time you can also add how it went, a score and a one-line note. All of it is optional, and one line is enough. The History tab brings it together: a score trend chart where tapping a point shows that session's note, a study calendar where the shade is the time you put in and the border is how the day felt, and the full list of records grouped by date and filterable by subject. Reading the note you wrote two weeks ago next to today's score is what makes progress feel real. Records can be edited or deleted later. STAY CONSISTENT See how many days in a row you have studied and how many days this week you took part, with the past seven days charted and broken down by subject. The weekly measure is forgiving, so a missed day is easy to recover from. EXAM-STYLE TIMER Register the start and end times of each section as a preset and rehearse with realistic timing. REMINDERS Get alerts for tasks whose due dates are near, plus a morning summary of the day. Set the time to fit your routine, or switch reminders off. BACKUP YOUR DATA Export your plan and records to a file and read it back to restore everything on a new device. Your data stays on your device: no account, nothing sent to a server. That also means a device change cannot be guaranteed to carry it over, so keeping your own file is easy, with an optional monthly reminder. LANGUAGES AND PRICING Available in English, Japanese, Chinese, Korean, Spanish, French, German and Portuguese. All core features are free. An ad is shown at the bottom, and a one-time purchase removes it. You can log unlimited records for free; the free plan shows the last fourteen days of detail, older records are never deleted, and the same purchase unlocks the full history, note search and CSV export. Register your target exam, create your subjects, and list tasks with due dates. Then open the app each day, clear your tasks and log your time. The longer you keep it up, the longer your streak grows and the higher your chart climbs.
Screenshots
Verdict
The clearest difference is in-app purchases: 렘수면 at none against Exam Countdown & Study Timer's 1. 렘수면 also leads on ads (none vs shown) and iOS requirement (13.0 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. Exam Countdown & Study Timer sells 1 one-off in-app purchase. 렘수면 asks for nothing beyond the download.
렘수면 ships an update every 10 days, Exam Countdown & Study Timer every 3 weeks. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.
| Parameter | 렘수면 | Exam Countdown & Study Timer |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Every 10 days — better | Every 3 weeks |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 26 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | Insight&myung, LLC | BEAK,K.K. |
In-app purchases
렘수면
No in-app purchases
Exam Countdown & Study Timer
- Pro (ad-free + full history)$0.99








