Comparison

Big Clock vs NanoLuna

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

Head to head
About

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.

Highlights
  • Full-screen digital clock display
  • Customizable digit colors
  • Multiple alarm settings
  • Countdown timer
  • Stopwatch with lap feature
  • Display day and date
Features
Read full description

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/

About

NanoLuna

Features
Read full description

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

Big Clock4 screens
NanoLuna4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
Big Clock versus NanoLuna: the parameters behind the verdict, then further details
ParameterBig ClockNanoLuna
PriceFreeFree
Rating3.5 (4 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 3 monthsEvery 2 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationAd-supported—
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.0 — better26.0
Further details — not scored
Size66 MB11 MB
Age rating4+4+
DeveloperKevin Ghori恒俭 董

In-app purchases

3 purchases

Big Clock

Subscriptions3
  • Big Digital Clock Weekly Plan$4.997 Days
  • Big Digital Clock Monthly Plan$9.991 Month
  • Big Digital Clock Yearly Plan$49.991 Year
1 purchases

NanoLuna

One-time1
  • Pro Lifetime$0.99

Questions

Is Big Clock free?
Big Clock is free to download, with in-app purchases available.
Is NanoLuna free?
NanoLuna is free to download, with in-app purchases available.
Do Big Clock or NanoLuna have ads?
Big Clock shows ads; NanoLuna does not.
Which is updated more often, Big Clock or NanoLuna?
Big Clock ships an update every 3 months, and NanoLuna every 2 weeks. Most recently, Big Clock was updated on November 3, 2026 and NanoLuna on October 31, 2026.

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