Comparison

Big Clock vs ayi9

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

ayi9

Features
Read full description

Ayi9 IoT Management Platform Built on the wlink IoT protocol, Ayi9 focuses on full-lifecycle management of UPS, air conditioners, voltage regulators, and solar systems. With "remote, real-time, intelligent" features, it’s a core O&M tool across industries. I. Core Functions 1. Equipment Monitoring It collects/analyzes key data in real time (via dashboards/reports), covering: UPS: Input/output voltage/current, battery level, fault alarms. Air conditioners: Mode, temp (set/actual), wind speed, component status. Voltage regulators: Input fluctuation, output stability, load rate. Solar systems: PV power generation, inverter efficiency, battery status. 2. Remote/Local Operation Users control equipment anywhere: UPS: Remote on/off, mode switching, parameter adjustment. Air conditioners: Temp setting, mode/wind speed change, scheduled on/off. Voltage regulators: Output calibration, protection activation. Solar systems: Inverter control, battery threshold adjustment. II. Technical Foundation: wlink Protocol Low latency: Fast data sync and command execution. High reliability: Anti-interference, stable connection in complex environments. Security: Encrypted transmission, preventing tampering/leakage. III. Application Scenarios Widely used in: Telecom: Equipment room UPS/air conditioner monitoring. Base stations: UPS/solar system management. Finance: ATM voltage regulator/UPS monitoring. Transportation: Expressway toll system UPS monitoring. Energy: Solar power station equipment management.

Screenshots

Big Clock4 screens
ayi93 screens

Verdict

The call

The clearest difference is in-app purchases: ayi9 at none against Big Clock's 3. ayi9 also leads on ads (none vs shown) and update cadence (every 6 weeks vs every 3 months). On price 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. ayi9 asks for nothing beyond the download.

UpkeepUpdate frequency

Big Clock ships an update every 3 months, ayi9 every 6 weeks. The most recent releases landed on October 3, 2026 and October 18, 2026 respectively.

Scorecard4 real differences · 6 level
Big Clock versus ayi9: the parameters behind the verdict, then further details
ParameterBig Clockayi9
PriceFreeFree
Rating3.3 (3 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 monthsEvery 6 weeks — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationAd-supported—
DevicesiPhone, iPad — betteriPhone
Requires iOS18.016.6 — better
Further details — not scored
Size66 MB3 MB
Age rating4+17+
DeveloperKevin Ghori汉民 杨

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
None

ayi9

No in-app purchases

Questions

Is Big Clock free?
Big Clock is free to download, with in-app purchases available.
Is ayi9 free?
ayi9 is free to download, with no in-app purchases.
Do Big Clock or ayi9 have ads?
Big Clock shows ads; ayi9 does not.
Which is updated more often, Big Clock or ayi9?
Big Clock ships an update every 3 months, and ayi9 every 6 weeks. Most recently, Big Clock was updated on October 3, 2026 and ayi9 on October 18, 2026.

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