Big binary clock vs CDAY
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Big binary clock
This app displays the current time using binary code. Customize the appearance with different LED shapes, colors, and brightness levels. It offers a unique way to view time for tech enthusiasts.
- Binary time display
- Round LED option
- Square LED option
- Geek mode
- Customizable colors
- Adjustable brightness
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Big Binary clock is a engaging innovation that does exactly what you'd expect a Binary Clock to do - it tells the time in Binary format. Options: -Round LED's -Square LED's -Geek mode -Show time (on / off) -Auto lock (on / off) -time format (12 / 24 ) -All colors (swipe right, left for change colors) -Brightness (swipe up, down for change brightness) -Tap for hide help numbers
CDAY
This app helps you remember important dates with a charming cartoon countdown interface. Add widgets to your home screen to see upcoming events like birthdays, anniversaries, and trips at a glance. Make waiting for special days feel more joyful and organized.
- Cartoon-style countdowns
- Anniversary Time Machine
- Future date countdowns
- Flexible recurring reminders
- Stylish customizable cards
- Home screen widgets
- Widget label filters
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This is a cartoon-style countdown app with a clean and beautiful interface. It includes a variety of fun cartoon themes for countdowns, so every time you see the different days you care about, you'll feel a unique sense of joy. Add beautiful widgets to your home screen, and you'll never forget an important day again. There are always some days in life that make you smile just by thinking about them — anniversaries, paydays, concerts, trips, friends' birthdays... You don't want to forget them, and you can't bear to. With cartoons and colors, we help you collect all those dear-to-heart days. Every time you open the app, it feels like unwrapping a little gift of anticipation. = Highlights = - Anniversary Time Machine: Not just counting down, but also showing "how many days we've been together" - Future Date Countdown: Exams, trips, payday — one glance each day, and your excitement builds - Flexible Recurring Reminders: Annual birthdays, weekly anime episodes — set it your way - Stylish Cards: Change backgrounds and icons freely - Home Screen Widgets: All important dates at a glance, automatically sorted by remaining days - Widget Label Filters: Work, life, fandom, study — different colors for different labels = Perfect for you if = - You like cute, warm, and well-designed tools - You have many important dates you don't want to forget - You want waiting to feel a little more fun Let every day that matters to you be worth remembering in the cutest way.
Screenshots
Verdict
The clearest difference is price: CDAY at Free against Big binary clock's $0.99. CDAY also leads on review sentiment (88% vs 50%) and update cadence (monthly vs every 13 months). Big binary clock's advantage is in-app purchases (none vs 1) and ratings volume (5 vs 1). On ads 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
CDAY is free to download; Big binary clock costs $0.99 up front. CDAY sells 1 one-off in-app purchase. Big binary clock asks for nothing beyond the download.
CDAY holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Big binary clock has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of Big binary clock's written reviews are positive against 88% of CDAY's.
Big binary clock ships an update every 13 months, CDAY monthly. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.
| Parameter | Big binary clock | CDAY |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.6 (5 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 50.0% of reviews | 88.0% of reviews — better |
| Number of ratings | 5 — better | 1 |
| Update frequency | Every 13 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.4 — better | 16.0 |
| Further details — not scored | ||
| Size | 2 MB | 56 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexander Rutkowskij | 仲辉 黄 |
Customer experience
Big binary clock
CDAY
In-app purchases
Big binary clock
No in-app purchases
CDAY
- Full version$2.99







