Comparison

ZenClock vs SkyChrono

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

Head to head
About

ZenClock

This app transforms your iPad or iPhone into a visually appealing desk clock. It offers interactive time displays with customizable background color modes, including a unique spectrum that cycles through millions of colors over time.

Highlights
  • Minimalist design
  • Interactive time display
  • Widgets for quick access
  • Single background color modes
  • Color Clock modes with spectrum cycling
  • Optimized for desk stands
Features
Read full description

Zen Clock is a minimalist iPhone clock built around calm, legibility, and strong typography. Designed to work beautifully on a desk, nightstand, charging stand, or an always-nearby spare iPhone, it offers a full-screen time surface that never demands your attention. We intentionally avoided building a generic alarm, timer, or productivity app. Instead, Zen Clock’s promise is simple: make checking the time feel quiet, polished, and visually intentional. Signature Color Clock Modes Experience time as a living color, not just digits. Our signature Color Clock modes transform the current time into a shifting, live background gradient. Full Spectrum: Maps Unix time across the entire color spectrum. Day Mode: Maps the current day from midnight to night. Hour Mode: Maps the current hour from the top to the end of the hour. Curated Visual Themes & Typography Choose from seven striking visual themes, including White on Black, Black on White, White on Blue, Red on Black, and our signature Color Clock modes. Pair your theme with four distinct typographic styles (Zen, Rounded, Mono, and Serif) to make your clock feel airy, friendly, precise, or editorial. Composed for Your Space With our preview-first settings, you aren't just toggling options—you are composing a timepiece. Choose the layout that fits your environment: Pure: The ultimate minimalist experience. Time only. Calendar: Elegantly integrates the weekday and date. Editorial: A beautiful, designed asymmetric composition. Board: A restrained status surface that gracefully holds supporting information without overpowering the time. Supporting Context (Premium) For those who want a bit more at a glance, Zen Clock gracefully integrates extra details without the clutter. Add a curated World Clock rail to display up to two global cities (such as Los Angeles, New York, London, Paris, Tokyo, or Sydney). Access live local weather conditions and temperatures seamlessly integrated into your composed layout while the app is open. Home Screen Widget Bring a touch of Zen Clock to your Home Screen with our included minimal clock widget, featuring a stark black background, crisp white text, and our signature aesthetic. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sociallycs.com/privacy.html

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.

Screenshots

ZenClock4 screens
SkyChrono4 screens

Verdict

The call

The clearest difference is in-app purchases: SkyChrono at none against ZenClock's 2. SkyChrono also leads on iOS requirement (18.0 vs 26.0). On price, ads 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. ZenClock sells 2 in-app purchases, starting at $1.99 per month. SkyChrono asks for nothing beyond the download.

Scorecard2 real differences · 8 level
ZenClock versus SkyChrono: the parameters behind the verdict, then further details
ParameterZenClockSkyChrono
PriceFreeFree
Rating4.0 (4 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 3 months—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPad — betteriPhone
Requires iOS26.018.0 — better
Further details — not scored
Size8 MB1 MB
Age rating4+4+
DeveloperSocially Conscious Software LLCBian Dhoan Kwik

In-app purchases

2 purchases

ZenClock

Subscriptions2
  • Zen Clock Plus Monthly$1.991 Month
  • Zen Clock Plus Yearly$19.991 Year
None

SkyChrono

No in-app purchases

Questions

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

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