Big Clock vs NanoLuna
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/
NanoLuna
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NanoLuna undergoes a massive V2 evolution! NanoLuna is a smart calendar app designed for users with complex holiday schedules. Say goodbye to the daily struggle of deciding whether to set an alarm for tomorrow. 【What's New: Flexible Groups & Visual Timeline】 • Group Alarms: Break free from single-alarm limits. Setup custom alarms automatically categorized by "Workday", "Weekend", and "Holiday" groups. Support for up to 5 alarms per group. • Innovative Timeline View: A new dedicated rule management page. Swipe the timeline to visually review and organize all your alarm schedules. • Smart Wake Now Free: Our premium "Smart Alarm" waking strategy is completely unlocked and permanently free for all users! • UI/UX Overhaul: Modern visual redesign for smoother and better interaction. 【Smart Holiday Alarms】 • Automatically recognizes workdays, statutory holidays, weekends, and make-up days. • Rings on workdays, silences on holidays, and rings as usual on make-up workdays. • Supports Siri Shortcuts to voice-control native system alarms. • Custom ringtones supported (up to 30 seconds). 【Night Clock】 • Night Clock: a fullscreen landscape clock designed for bedside viewing. 【Beautiful Desktop Widgets】 • 3 Sizes: Small (Today Glance), Medium (Month View + Holidays), Large (Comprehensive info). • Real-time lunar calendar, solar terms, and holiday countdowns. • iOS frosted glass design blending seamlessly onto your home screen. 【Lunar & Traditional Calendars】 • Precise Gregorian-Lunar conversion (1900-2100). • Exact dates for 24 Solar Terms. • Traditional Almanac dos and don'ts. • Countdown to the next holiday for easy tracking. 【Multi-Region Support】 • China: Complete statutory holidays + adjusted make-up workdays. • Japan: Public holiday calendar. • Korea: Public holiday calendar. • Auto-detects device region with smart recommendations. Download NanoLuna and make every morning anxiety-free.
Screenshots
Verdict
The clearest difference is ads: NanoLuna at none against Big Clock's shown. NanoLuna also leads on update cadence (every 2 weeks vs every 3 months). Big Clock's advantage is iOS requirement (18.0 vs 26.0). On price, 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
Both are free to download. Big Clock sells 3 in-app purchases, starting at $4.99 per 7 days and NanoLuna sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Big Clock ships an update every 3 months, NanoLuna every 2 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | Big Clock | NanoLuna |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (4 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 66 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Kevin Ghori | 恒俭 董 |
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
NanoLuna
- Pro Lifetime$0.99









