Comparison

Countdown & Calendar vs AI Usage

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

Head to head
About

Countdown & Calendar

Read full description

Anticipation makes every event more special. Whether it is a long-awaited vacation, a major career milestone, or a loved one's birthday, counting down the days builds excitement and helps you prepare. Countdown & Calendar is an all-in-one utility app designed to help you capture, track, and celebrate these important moments. Moving beyond a standard reminder tool, it combines precise, down-to-the-second countdowns with robust global calendar support—including five popular lunar calendars—so you never miss a date regardless of how you track time. With deep personalization options, beautiful live-ticking home screen widgets, and reliable offline access, the app ensures that your upcoming holidays, anniversaries, and personal goals are always beautifully organized and right at your fingertips. Key Features: Create Custom Events: Add an event with a specific date and time down to the second. You can customize it with an icon, color, photo, title, and description. The app will count down to your event and send you timely notifications and reminders. Events can also be set to repeat monthly or yearly, so you never have to recreate recurring occasions like birthdays or holidays. Home Screen Widgets: Add widgets directly to your phone's screen. They feature a live countdown ticking in real time, allowing you to conveniently keep an eye on upcoming events without opening the app. Multiple Calendars: The app provides various calendar systems, including the international (Gregorian) solar calendar and five popular lunar calendars (Chinese, Vietnamese, Hindu, Islamic, and Jewish). You can view your events in a monthly grid, check upcoming holidays, and quickly create a new countdown simply by tapping a date. Categorization & Filtering: Organize your events using custom categories. The Home screen features a robust search and filter tool, which is incredibly useful if you are tracking dozens or even hundreds of countdowns. Other Features: Custom Themes: Support for both light and dark modes, allowing you to choose between a clean light theme or an eye-soothing dark theme. Global Support: Available in 15+ languages, including English, Spanish, German, French, Italian, Russian, Chinese, Japanese, Korean, Turkish, Vietnamese, Indonesian, Thai, Filipino, and Portuguese. Data Backup & Restore: Easily export or back up your data by navigating to Settings → Export/Backup. If you get a new phone, restoring your data is just as simple via Settings → Restore data. Offline Mode: The core features of the app work completely offline.

About

AI Usage

Features
Read full description

Track your AI service usage and stay within your limits. THE PROBLEM AI services have usage quotas. You lose track. Limits hit at the worst time. WHY CHECKING MANUALLY ISN'T ENOUGH Each service has its own settings page — but nobody opens five different apps to check usage one by one until it's too late. THE SOLUTION AIUsage tracks your AI service quotas — Claude, Cursor, Antigravity, and more. See exactly how much you've used, how much is left, and when it resets. Simple. Visual. No more surprise limits. Support: steve_ham@icloud.com

Screenshots

Countdown & Calendar4 screens
AI Usage3 screens

Verdict

The call

The clearest difference is in-app purchases: AI Usage at none against Countdown & Calendar's 1. AI Usage also leads on update cadence (every 11 days vs every 65 months) and device support. Countdown & Calendar's advantage is iOS requirement (16.4 vs 18.0). On price 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. Countdown & Calendar sells 1 one-off in-app purchase. AI Usage asks for nothing beyond the download.

UpkeepUpdate frequency

Countdown & Calendar ships an update every 65 months, AI Usage every 11 days. The most recent releases landed on September 8, 2026 and September 20, 2026 respectively.

Scorecard4 real differences · 2 level
Countdown & Calendar versus AI Usage: the parameters behind the verdict, then further details
ParameterCountdown & CalendarAI Usage
PriceFreeFree
Update frequencyEvery 65 monthsEvery 11 days — better
Ads—No
In-app purchasesYesNo — better
Devices—iPhone, iPad — better
Requires iOS16.4 — better18.0
Further details — not scored
Size66 MB17 MB
Age rating4+4+
DeveloperThieu KhueSeung-Un Ham

In-app purchases

1 purchases

Countdown & Calendar

One-time1
  • Lifetime Pro$4.99
None

AI Usage

No in-app purchases

Questions

Is Countdown & Calendar free?
Countdown & Calendar is free to download, with in-app purchases available.
Is AI Usage free?
AI Usage is free to download, with no in-app purchases.
Which is updated more often, Countdown & Calendar or AI Usage?
Countdown & Calendar ships an update every 65 months, and AI Usage every 11 days. Most recently, Countdown & Calendar was updated on September 8, 2026 and AI Usage on September 20, 2026.

Other comparisons