Big Clock vs SFClock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Big Clock
This utility app displays the current day, time, and date in a large, full-screen digital format. It offers customization options for clock digit color and includes integrated alarm, timer, and stopwatch functionalities with advanced settings like repetition and lap tracking.
- Full-screen digital clock display
- Customizable digit colors
- Multiple alarm settings
- Countdown timer
- Stopwatch with lap feature
- Display day and date
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Big Clock: The Ultimate High-Visibility Digital Display. Never struggle to read the time again. Big Digital Clock transforms your entire screen into a massive, crystal-clear time hub. Whether you need a reliable bedside clock for your nightstand or a giant countdown timer for the gym, our app delivers maximum visibility with a minimalist touch. WHY USERS LOVE BIG CLOCK: The Biggest Display: A true full-screen experience designed for visibility from across the room. Aesthetic Themes: Personalize your display with vibrant neon colors and high-contrast glow effects. Precision Tools: Includes a high-contrast Stopwatch with Laps and a Countdown Timer for workouts or study sessions. Smart Nightstand Alarms: Set multiple alarms with custom snooze, repetition, and loud wake-up tones. KEY FEATURES: 12/24 Hour Toggle: Switch formats instantly to suit your preference. Full Customization: Use the professional color picker to match your room’s aesthetic. Stay Punctual: A simple, distraction-free interface that stays active while you work or sleep. Stay punctual with the most readable clock on the App Store. Download Big Digital Clock today! Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
SFClock
This utility app displays a flip clock and calendar. It offers customizable clock settings like 12/24 hour format and seconds display. Users can navigate the calendar and choose from various light and dark color themes.
- Flip clock display
- Calendar view
- 12/24 hour format
- Seconds display toggle
- Calendar month navigation
- Color themes
- Light/dark mode
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SFClock is a simple flip clock and calendar App. Flip clock and calendar are displayed in portrait, and only clock in landscape. You can change 12/24 hours and seconds display of clock. You also can move month in calendar with the arrows, and back to current month by tapping the month title. There are many color themes, and you can choose a light or dark one to use.
Screenshots
Verdict
The clearest difference is rating: SFClock at 4.5 against Big Clock's 3.3. SFClock also leads on in-app purchases (none vs 3) and ads (none vs shown). On price, ratings volume, update cadence 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
Both are free to download. Big Clock sells 3 in-app purchases, starting at $4.99 per 7 days. SFClock asks for nothing beyond the download.
SFClock holds the better App Store score, 4.5 against 3.3. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews point the same way: 0% of Big Clock's written reviews are positive against 33% of SFClock's.
Big Clock ships an update every 3 months, SFClock every 5 months. The most recent releases landed on September 16, 2026 and September 14, 2026 respectively.
| Parameter | Big Clock | SFClock |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (3 ratings) | 4.5 (4 ratings) — better |
| Positive reviews | 0.0% of reviews | 33.3% of reviews — better |
| Number of ratings | 3 | 4 — better |
| Update frequency | Every 3 months — better | Every 5 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, Vision Pro — better |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 66 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | Kevin Ghori | Yafei Dong |
Customer experience
Big Clock
SFClock
In-app purchases
Big Clock
- Big Digital Clock Weekly Plan$4.997 Days
- Big Digital Clock Monthly Plan$9.991 Month
- Big Digital Clock Yearly Plan$49.991 Year
SFClock
No in-app purchases
Questions
Is Big Clock free?
Is SFClock free?
Which has better reviews, Big Clock or SFClock?
Do Big Clock or SFClock have ads?
Which is updated more often, Big Clock or SFClock?
Other comparisons
