Comparison

레드커넥트 vs D

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

Head to head
About

레드커넥트

This app streamlines the blood donation process, allowing users to easily book appointments, track their blood's journey, and access health reports. It offers a transparent and convenient way to contribute to blood donation.

Highlights
  • Book blood donation appointments
  • Track blood journey from donation to completion
  • Access health reports and blood test results
  • Find nearby donation centers
  • Complete electronic questionnaires
  • View blood inventory status
Features
Read full description

▶ 대한적십자사와 SK텔레콤이 함께 만든 공식 헌혈 앱 오픈 헌혈, 즐거운 경험이 되다. 이제 건강하게! 투명하게! 간편하게! 완전히 새로워진 헌혈 앱 ‘레드커넥트’를 만나보세요 ▶ 건강하게 헌혈하세요! 헌혈 혈액 검사를 누적하고 건강관리 서비스로 받아보세요! 혈액 리포트부터 보건의료 빅데이터 분석까지 나에게 도움이 되는 헌혈! ▶ 투명하게 헌혈하세요! 헌혈 이후 궁금했던 내 혈액의 전달! 이제 혈액의 이동 과정을 알려드려요! 헌혈의 집 -> 혈액원 -> 혈액검사 완료까지, 한눈에 체크! ▶ 간편하게 헌혈하세요! 이제 버튼 5개만으로 헌혈을 예약해 보세요 앱을 통해 전자문진도 할 수 있어요! 헌혈의 집 고르고 -> 날짜 누르고 -> 헌혈 종류와 시간 고르면 예약 끝! 레드커넥트는 내 헌혈 기록, 혈액보유 현황, 헌혈 이벤트, 헌혈의 집&버스 위치찾기 기능도 지원합니다. [수상실적] 공공데이터전략위원장상 수상 과학기술정보통신부 장관상 수상 건강보험심사평가원장상 수상 레드커넥트는 기술로 더 따뜻한 세상을 만들기 위해 SK텔레콤과 대한적십자사가 함께 만든 새로운 스마트 헌혈 브랜드입니다! ◎ 앱 접근권한 안내 사용자는 레드커넥트의 원활한 이용을 위해 아래의 권한을 허용할 수 있습니다.  각 권한은 그 속성에 따라 반드시 허용해야 하는 필수 권한과 선택적으로 허용이 가능한 선택 권한으로 나뉩니다. 1. 필수 허용 권한 없음 2. 선택 허용 권한 바이오 정보 - 건강 정보 탭 접근을 위한 간편 인증 시 필요합니다. 위치 - 가까운 헌혈의 집 위치 조회 시 필요합니다. 사진 - 프로필 사진 설정 시 필요합니다. 알림 - 헌혈 관련 알림을 받기 위해 필요합니다. 카메라 - 헌혈증서 스캔을 위해 필요합니다. * 선택 허용 권한은 동의하지 않아도 서비스를 이용할 수 있습니다. * 휴대폰 설정 -> 앱 -> 레드커넥트에서 허용 권한을 변경할 수 있습니다. [연락처] 앱 이용 중 불편 사항이나 요청사항은 아래 이메일로 문의 주시기 바랍니다. 적극 반영하도록 하겠습니다. 이메일 : app.redconnect@gmail.com 전화번호 : 대한적십자사 CRM센터 1600-3705 (오전 9:00 ~ 오후 6:00) 만든이 : SK Telecom, 대한적십자사 개발자 : SK Telecom 제공자 : 대한적십자사 저작권 : SK Telecom

About

D

Display important dates like anniversaries and birthdays on your home screen, lock screen, and Apple Watch. Customize with emojis and choose display options for a personalized view of your special days.

Highlights
  • Home screen widgets (small, medium, large)
  • Lock screen widgets (inline, circular, rectangular)
  • Apple Watch complications
  • Emoji customization for dates
  • Automatic D-Day calculation
  • Intuitive card-based UI
Features
Read full description

Put the days that matter on your Lock Screen. D-Day Widget counts down to the dates you care about — and keeps counting the days since — right on your Home Screen, Lock Screen, and Apple Watch. ■ Widgets everywhere - Home Screen: small and medium widgets - Lock Screen: inline, circular, and rectangular widgets - Apple Watch: circular and rectangular complications - Choose which anniversary each widget shows ■ Made to look the way you want - 1,000+ emojis, with the ones you use most floated to the top - Toggle the emoji, name, day count, and actual date - A clean card layout that stays readable at a glance ■ Counting that matches how you count - Automatic D-Day math (D-7, D+100) - Pick your counting style: D+1, which counts the start day, or D-0 - Upcoming milestones at a glance: D+100, D+1000, 1 year, 10 years ■ Perfect for - Wedding and dating anniversaries - Birthdays, D-100, D-200 - Exams, first day at a new job, discharge day - Trips, due dates, deadlines, streaks Go Premium to remove every ad and keep things clean. Add a date, add the widget, and never lose track again. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

레드커넥트4 screens
D4 screens

Verdict

The call

The clearest difference is rating: 레드커넥트 at 4.6 against D's 2.5. 레드커넥트 also leads on in-app purchases (none vs 1) and ads (none vs shown). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. D sells 1 one-off in-app purchase. 레드커넥트 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

레드커넥트 holds the better App Store score, 4.6 against 2.5. That said, the two scores are not equally well evidenced: 레드커넥트 has 20 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 97% of 레드커넥트's written reviews are positive against 76% of D's.

UpkeepUpdate frequency

레드커넥트 ships an update every 6 weeks, D every 5 weeks. The most recent releases landed on September 23, 2026 and September 25, 2026 respectively.

Scorecard7 real differences · 3 level
레드커넥트 versus D: the parameters behind the verdict, then further details
Parameter레드커넥트D
PriceFreeFree
Rating4.6 (20 ratings) — better2.5 (2 ratings)
Positive reviews97.2% of reviews — better76.2% of reviews
Number of ratings20 — better2
Update frequencyEvery 6 weeksEvery 5 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS13.0 — better17.0
Further details — not scored
Size59 MB26 MB
Age rating12+4+
Developer대한적십자사kyulabs

Customer experience

레드커넥트

All ratings20 ratings
Positive85.0%
Neutral10.0%
Negative5.0%
Written reviews36 reviews
Positive97.2%
Neutral0.0%
Negative2.8%

D

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews21 reviews
Positive76.2%
Neutral4.8%
Negative19.0%

In-app purchases

None

레드커넥트

No in-app purchases

1 purchases

D

One-time1
  • Remove in-app ads$9.99

Questions

Is 레드커넥트 free?
레드커넥트 is free to download, with no in-app purchases.
Is D free?
D is free to download, with in-app purchases available.
Which has better reviews, 레드커넥트 or D?
레드커넥트 is rated higher. 레드커넥트 averages 4.6 out of 5 from 20 ratings, while D averages 2.5 from 2 ratings.
Do 레드커넥트 or D have ads?
D shows ads; 레드커넥트 does not.
Which is updated more often, 레드커넥트 or D?
레드커넥트 ships an update every 6 weeks, and D every 5 weeks. Most recently, 레드커넥트 was updated on September 23, 2026 and D on September 25, 2026.

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