Comparison

CozyDay vs Sub

Price, ratings, monetisation and update history for both apps, side by side β€” 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

Sub

Features
Read full description

Sub is designed with the clinical experience and guidance of a couples therapist. Sub is not therapy or a diagnostic tool β€” it is your own judgment-free space for reflection. Sub is a quiet evening companion for your relationship. No feeds, no chat, no daytime noise. Sub stays silent through the day and listens only at night. When the day ends, you speak for two minutes and mark three simple lines β€” warmth, time together, closeness. Through the night, Sub weaves what you said into a calm, personal reflection that returns to you in the morning. Your voice is enough. You don't need to form perfect sentences. Sub notices not only what you say, but the tone underneath it β€” softening, tension, a held breath β€” and gently mirrors the moment back so you feel seen. WHAT SUB DOES β€’ Nightly voice reflection β€” two minutes, then a warm morning note β€’ Voice tone observations, never judgment or advice β€’ A single inward question to sit with β€” never a to-do β€’ Archive & heatmap β€” see the pattern of your nights over time β€’ Emergency mode β€” one short minute when a day overflows SUB PRO β€’ Deep Voice Anatomy β€” the feeling beneath your tone β€’ Memory & detail tracking β€” quotes that return when they matter β€’ Smart Bridge β€” an invisible bridge if your partner joins β€’ Relationship Map β€” a weekly trace on warmth and trust Try 3 days free, then $3.99/month or $34.99/year. Cancel anytime. YOUR PRIVACY Your voice is processed to create your reflection and then deleted β€” it is never stored on our servers. You can delete your account and all data at any time. Sub is a companion for self-reflection, not a substitute for professional help or medical advice. Available in English, TΓΌrkΓ§e, FranΓ§ais, Italiano and Русский. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sub.1000crypto.site/gizlilik

Screenshots

CozyDay3 screens
Sub4 screens

Verdict

The call

The clearest difference is in-app purchases: CozyDay at none against Sub's 2. Sub's advantage is ads (none vs shown) and iOS requirement (15.1 vs 18.0). On price, update cadence and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Sub sells 2 in-app purchases, starting at $3.99 per month. CozyDay asks for nothing beyond the download.

UpkeepUpdate frequency

CozyDay ships an update every 2 days, Sub every 3 days. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

Scorecard3 real differences Β· 5 level
CozyDay versus Sub: the parameters behind the verdict, then further details
ParameterCozyDaySub
PriceFreeFree
Positive reviews100.0% of reviewsβ€”
Update frequencyEvery 2 days β€” betterEvery 3 days
AdsYesNo β€” better
In-app purchasesNo β€” betterYes
MonetizationAd-supportedβ€”
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.015.1 β€” better
Further details β€” not scored
Size31 MB48 MB
Age rating+44+
DeveloperMyeongJin LeeBerkan ARIKAN

In-app purchases

None

CozyDay

No in-app purchases

2 purchases

Sub

Subscriptions2
  • Sub Pro Monthly3 Days trial$3.991 Month
  • Sub Pro Annual3 Days trial$34.991 Year

Questions

Is CozyDay free?
CozyDay is free to download, with no in-app purchases.
Is Sub free?
Sub is free to download, with in-app purchases available.
Do CozyDay or Sub have ads?
CozyDay shows ads; Sub does not.
Which is updated more often, CozyDay or Sub?
CozyDay ships an update every 2 days, and Sub every 3 days. Most recently, CozyDay was updated on October 31, 2026 and Sub on October 25, 2026.

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