Comparison

CozyDay vs 삐디

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

Head to head
About

CozyDay

This app helps couples track their relationship milestones, from the first date to anniversaries. It offers a D-Day counter, a shared calendar, love letters, and widgets to keep memories alive and celebrate special days together.

Highlights
  • D-Day counter
  • Anniversary management
  • Home and lock screen widgets
  • Memory photo attachments
  • 24-hour disappearing love letters
  • Couple profile creation
  • Customizable notification settings
Features
Read full description

Track every day of your love story -- from the first date to forever. D-Day counter, 24-hour love letters, couple calendar, anniversary alerts, and home/lock screen widgets -- everything couples need, all in one beautifully designed app. An adorable pixel art dog character joins you on your special days. --- Key Features --- [D-Day Counter] See how many days you've been together at a glance, from the day you met until today. Every time you open the app, a count-up animation brings a flutter of excitement. [Anniversary Management] 100 days, 200 days, 1 year... Automatically generated anniversaries, plus the ability to add your own special dates. Never miss Valentine's Day, Christmas, and other suggested anniversaries. [Check Daily with Widgets] Check your D-Day anytime with home screen and lock screen widgets. Automatically updated at midnight so the date is always accurate. [Save Memories with Photos] Attach photos to each anniversary and record your precious memories. Look back on your story together in a timeline view. [24-Hour Letter] Send one special letter a day that disappears at the next midnight. Invite your partner with an invite code and view your exchanged letters in a chat bubble format. You'll receive a push notification when a new letter arrives, and a reminder 3 hours before it expires. [Couple Profile] Create your own couple profile with both of your names and photos. [Notification Settings] 1 day before, 3 days before, 1 week before an anniversary - receive notifications at your preferred time and prepare for your special days in advance. [Multi-Language Support] Available in 39 languages so anyone around the world can use it.

About

삐디

Features
Read full description

소중한 사람의 특별한 날, 이제 절대 잊지 마세요. BiDi는 다양한 기념일을 스마트하게 관리해주는 기념일 알림 앱이에요. 등록만 해두면 D-day를 매일 확인하고, 날짜가 다가오면 미리 알림을 보내드려요. [ 주요 기능 ] * 기념일·생일 관리 생일, 결혼기념일, 커플기념일, 반려동물, 추모일 등 모든 특별한 날을 한곳에서 관리하세요. * 음력 완벽 지원 음력으로 기억하는 부모님 생신, 제삿날도 정확하게 양력으로 변환해 알려드려요. * D-day 카운트다운 다가오는 기념일을 D-day로 한눈에 확인하고, 달력 뷰로 한 달의 일정을 파악하세요. * 스마트 알림 D-30부터 당일까지, 세심한 알림으로 절대 잊지 않게 도와드려요. * 메모 기능 기념일마다 선물 아이디어, 준비할 일 등을 메모로 남겨두세요. * 다크모드 지원 라이트/다크/시스템 설정에 맞춰 편안하게 사용하세요. [ 이런 분께 추천해요 ] - 매번 기념일을 까먹어서 혼나는 분 - 부모님, 연인, 친구의 생일을 한번에 관리하고 싶은 분 - 음력 생일을 양력으로 변환하기 번거로운 분 - 소중한 사람에게 먼저 챙겨주고 싶은 분 지금 바로 등록하고, 다음 기념일을 완벽하게 준비해보세요!

Screenshots

CozyDay3 screens
삐디4 screens

Verdict

The call

The clearest difference is ads: 삐디 at none against CozyDay's shown. 삐디 also leads on iOS requirement (15.1 vs 18.0). CozyDay's advantage is update cadence (every 2 days vs every 2 weeks). On price, 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

CozyDay ships an update every 2 days, 삐디 every 2 weeks. Both last shipped on October 31, 2026.

Scorecard3 real differences · 5 level
CozyDay versus 삐디: the parameters behind the verdict, then further details
ParameterCozyDay삐디
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyEvery 2 days — betterEvery 2 weeks
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.015.1 — better
Further details — not scored
Size31 MB21 MB
Age rating+44+
DeveloperMyeongJin LeeWoojung Jeon

In-app purchases

None

CozyDay

No in-app purchases

None

삐디

No in-app purchases

Questions

Is CozyDay free?
CozyDay is free to download, with no in-app purchases.
Is 삐디 free?
삐디 is free to download, with no in-app purchases.
Do CozyDay or 삐디 have ads?
CozyDay shows ads; 삐디 does not.
Which is updated more often, CozyDay or 삐디?
CozyDay ships an update every 2 days, and 삐디 every 2 weeks. Most recently, CozyDay was updated on October 31, 2026 and 삐디 on October 31, 2026.

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