Comparison

TheDayBefore (days countdown) vs Oshidays byGMO

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

Head to head
About

TheDayBefore (days countdown)

Easily manage important dates and countdown to special events with customizable widgets and decorative options. Record memories, share milestones with loved ones, and organize your schedule by category. Never miss a precious moment again.

Highlights
  • Customizable D-Day countdowns
  • Lock screen and home screen widgets
  • Multiple calculation methods (days, months, weeks)
  • Event decoration with stickers and effects
  • Story feature for recording memories with photos
  • Sharing of D-Day events
  • Category-based event grouping
Features
Read full description

From big exams and anniversaries to fandom days and graduation, turn every day you're waiting for into a event — managed with widgets, notifications, and stories. The Event app, The Day Before For students counting down to exams, couples tracking anniversaries, friends counting down to graduation, and fans marking their favorite artist's next release — — count every day with The Day Before. ● Make any day your own event · Choose from 80+ keywords including exams, couple anniversaries, graduation, fandom days, and baby milestones. · Never miss lunar calendar dates like lunar birthdays, memorial services, and holidays. · Select a keyword and the icon, background, and notifications are set up automatically. ● Pin your event as a widget on the screen you see every day · Check your event anytime with home screen and lock screen widgets. · Multiple sizes and styles — perfect for personalizing your phone. ● We'll remind you so you never forget your event · Get custom notifications on the day, D-7, D-3, or D-1 — whenever you want. · Anniversary notifications like 100 days and 1-year milestones are set automatically. ● Customize your event in your own style · Choose your own background photo, icon, effects, stickers, and fonts. · Your customized design shows up on your widget too. ● Capture today's excitement with a Story · Save special moments with photos and text for each date. · Upload up to 8 photos per story. ● Count together with people who share your vibe · Meet others waiting for the same day in Recommended events. · Album drops, weddings, new jobs — turns out you're not counting alone. · Connect with others through comments on Recommended events. [Optional Permissions] · Photos: Used to load and save photos when using or sharing background images. · Camera: Used to take and attach photos to your Stories. · You can still use the app without granting optional permissions, except for features that require them. Have a question? We're always here to help · Email: help@thedaybefore.kr · Terms of Use (EULA):https://www.thedaybefore.kr/terms

About

Oshidays byGMO

Track your fandom activities and celebrate anniversaries with your favorite idols or characters. Log memories, manage merchandise purchases, and set savings goals. Customize pages and earn in-app currency by watching ads.

Highlights
  • Register multiple idols/characters
  • Automatic day counting for support and anniversaries
  • Diary and memory logging
  • Merchandise purchase tracking
  • Idol savings management
  • Customizable backgrounds and text
  • Earn gems by watching ads
Features
Read full description

This app lets you instantly see how many days have passed since you started supporting your favorite idol, while also tracking your fandom activities (anniversary dates) and managing your finances! Packed with features to support your fan activities, like diaries, merchandise purchase logs, and idol savings! Register as many idols as you like—your favorite idols, anime characters, manga characters, and more! Not just for diaries about memories with your idol, it's also perfect for recording important memories like couple anniversaries, wedding anniversaries, your child's growth, or memories with your pet. 【Features】 ◆ Register Multiple Idols Create up to 100 dedicated pages for each idol! Record not just when you started supporting them, but also anniversaries, their signature colors, favorite things, and more. Once registered, the app automatically counts the days since you started supporting them and counts down to important milestones like the 100-day anniversary or 1-year anniversary! On the anniversary day, be sure to share the screen with your friends or your idol! ◆Earn Gems for Each Favorite Watch video ads to earn gems, which you can exchange for various items. Watching videos on your favorite's dedicated page triggers a sparkling effect for them, making gem collection fun! ※Exchange options will be added gradually ◆Record Stories for Each Favorite Want to keep diary-like memories with your favorite? This app features a “Story” function for preserving those moments. Creating a story automatically counts up the days since that entry. You can also set a future date for a story to count down the days until then! Perfect for counting down to your favorite idol's live event! ◆Freely Customize Backgrounds and Text You can freely customize your favorite idol's dedicated page. If you can't find a background image you like, freely choose colors, add animated effects, and create your very own unique page!

Screenshots

TheDayBefore (days countdown)4 screens
Oshidays byGMO4 screens

Verdict

The call

The clearest difference is ratings volume: TheDayBefore (days countdown) at 1.1K against Oshidays byGMO's 20. TheDayBefore (days countdown) also leads on review sentiment (86% vs 73%) and update cadence (every 4 days vs every 8 days). Oshidays byGMO's advantage is rating (5.0 vs 4.8) and monetization model (ad-supported vs free with in-app purchases). On price, ads, 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. TheDayBefore (days countdown) sells 2 in-app purchases, starting at $1.49 per month and Oshidays byGMO sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Oshidays byGMO holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: TheDayBefore (days countdown) has 1.1K ratings behind it against 20, so its average is the more settled of the two. Written reviews complicate that: 86% of TheDayBefore (days countdown)'s written reviews are positive against 73% of Oshidays byGMO's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

TheDayBefore (days countdown) ships an update every 4 days, Oshidays byGMO every 8 days. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

Scorecard5 real differences · 5 level
TheDayBefore (days countdown) versus Oshidays byGMO: the parameters behind the verdict, then further details
ParameterTheDayBefore (days countdown)Oshidays byGMO
PriceFreeFree
Rating4.8 (1.1K ratings)5.0 (20 ratings) — better
Positive reviews86.0% of reviews — better72.5% of reviews
Number of ratings1.1K — better20
Update frequencyEvery 4 days — betterEvery 8 days
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size338 MB149 MB
Age rating4+4+
DeveloperTheDayBefore, Inc.TownWiFi Inc.

Customer experience

TheDayBefore (days countdown)

All ratings1,084 ratings
Positive95.5%
Neutral2.1%
Negative2.4%
Written reviews1,064 reviews
Positive86.0%
Neutral7.1%
Negative6.9%

Oshidays byGMO

All ratings20 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews51 reviews
Positive72.5%
Neutral17.6%
Negative9.8%

In-app purchases

2 purchases

TheDayBefore (days countdown)

Subscriptions1
  • Basic (1-Month Plan)$1.491 Month
One-time1
  • Remove Ads$9.99
1 purchases

Oshidays byGMO

Subscriptions1
  • Premium plan 1 month$2.991 Month

Questions

Is TheDayBefore (days countdown) free?
TheDayBefore (days countdown) is free to download, with in-app purchases available.
Is Oshidays byGMO free?
Oshidays byGMO is free to download, with in-app purchases available.
Which has better reviews, TheDayBefore (days countdown) or Oshidays byGMO?
Oshidays byGMO is rated higher. TheDayBefore (days countdown) averages 4.8 out of 5 from 1.1K ratings, while Oshidays byGMO averages 5.0 from 20 ratings.
Do TheDayBefore (days countdown) or Oshidays byGMO have ads?
Both TheDayBefore (days countdown) and Oshidays byGMO show ads.
Which is updated more often, TheDayBefore (days countdown) or Oshidays byGMO?
TheDayBefore (days countdown) ships an update every 4 days, and Oshidays byGMO every 8 days. Most recently, TheDayBefore (days countdown) was updated on November 6, 2026 and Oshidays byGMO on November 7, 2026.

Other comparisons