Comparison

SkyChrono vs CatClock Mono

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

Head to head
About

SkyChrono

Features
Read full description

SkyChrono is a real-time astronomical dashboard for anyone who plans around the sky—astronomers, astrophotographers, navigators, and curious stargazers. SUN • Live altitude & azimuth • Sunrise, sunset, and solar noon • Civil / nautical / astronomical twilight • Current lighting state (day, twilight, night) + day length MOON • Current phase with illumination % • Moonrise & moonset • Live altitude & azimuth • Phase progression at a glance TIME SYSTEMS • Local time + timezone • UTC • Julian Date (JD) / Modified Julian Date (MJD) • Greenwich Mean Sidereal Time (GMST) • Local Sidereal Time (LST) LOCATION • Automatic GPS position (optional) • Manual coordinates anywhere on Earth • Decimal degrees or DMS input ALERTS & NIGHT MODE • Notifications for sunrise/sunset, twilight boundaries, golden hour, and major moon phases • Night Vision mode (red theme) to preserve dark adaptation EXPORT & LEARN • Save the dashboard as a high-resolution image • Export data as JSON, or copy any value with a tap • Built-in explanations for key astronomy concepts PRIVACY FIRST • No ads, no subscriptions • No tracking—your location stays on device • Manual location mode for complete control SkyChrono helps you pick the right moment—whether you’re planning a shoot, observing, or learning celestial mechanics.

About

CatClock Mono

Features
Read full description

Give Your Old Device a Second Life with CatClock Is your old iPhone or iPad gathering dust because it's too slow for modern apps? Transform it into a sophisticated, minimalist desk clock with CatClock. Designed with a high-contrast Black & White aesthetic, CatClock turns any device into a functional piece of decor. It’s not just a clock; it’s a silent, charming companion for your workspace. Key Features: - Minimalist Design: Pure B&W interface optimized for high visibility and aesthetic calm. - Interactive Companion: A charming pixel cat walks across your screen. Tap the cat to see it jump! - Adaptive Clock: Toggle between 12-hour (with AM/PM) and 24-hour formats with a simple tap. - Essential Dashboard: View your local weather and a monthly calendar at a glance. - Smart Layout: Supports both Portrait and Landscape orientations with smooth animations. - Upcycle Friendly: Lightweight and optimized specifically for older devices to ensure smooth performance. - English Only: A clean, distraction-free interface using only English text. - Stay focused and keep your desk stylish. Let CatClock watch the time for you.

Screenshots

SkyChrono4 screens
CatClock Mono3 screens

Verdict

The call

The clearest difference is device support: CatClock Mono at 3 against SkyChrono's 1. CatClock Mono also leads on iOS requirement (13.0 vs 18.0). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences · 3 level
SkyChrono versus CatClock Mono: the parameters behind the verdict, then further details
ParameterSkyChronoCatClock Mono
PriceFreeFree
AdsNoNo
In-app purchasesNoNo
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS18.013.0 — better
Further details — not scored
Size1 MB22 MB
Age rating4+4+
DeveloperBian Dhoan KwikJawoong Ku

In-app purchases

None

SkyChrono

No in-app purchases

None

CatClock Mono

No in-app purchases

Questions

Is SkyChrono free?
SkyChrono is free to download, with no in-app purchases.
Is CatClock Mono free?
CatClock Mono is free to download, with no in-app purchases.
Do SkyChrono or CatClock Mono have ads?
Neither SkyChrono nor CatClock Mono shows ads.

Other comparisons