Comparison

Twinkle Clock vs Sun Based Time

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

Head to head
About

Twinkle Clock

Features
Read full description

Twinkle Clock turns your screen into a night sky — a clock face made of twinkling stars and constellations. FREE • 12 zodiac constellations, swipe to switch • A twinkling starfield with the time overlaid on constellation lines PRO (one-time purchase) • All 88 official constellations • ~8,900 naked-eye stars across the whole sky • The Milky Way and the Moon & planets (Mercury–Saturn) • Nebulae, star clusters, and galaxies • Tap any star, the Moon, or a planet to read about it • Time Travel — pick any date and time to see what the sky looked like (or will look like) • Major meteor shower activity windows Available on iPhone, iPad, Mac, Apple TV, and Apple Vision Pro.

About

Sun Based Time

This app uses the sun's position to help you schedule your day and set alarms. It offers features like countdowns to sunrise and sunset, and alarms based on solar events or desired sleep duration. Visualize the sun's path and integrate with your calendar for a natural approach to time management.

Highlights
  • Sun-based clock
  • Countdown to sunrise/sunset
  • Visualize sun's path
  • Alarms by sun position
  • Wake by sleep duration
  • Sleep window by sunset/sunrise
  • Calendar integration
Features
Read full description

A clock and alarm app based on the sun, using the position of the sun where you are, with sleep scheduling in relation to sunrise and sunset. Sun Based Time gives you a grounded way to align with natural light. FEATURES ◆ Sun Based Clock - Countdown to Sunrise & Sunset Always know how long until sunrise or sunset. ◆ Visualize the Sun's Path Easily get a feel for which part of the day you are in. ◆ Set Alarms by the Sun Schedule alarms relative to sunrise, sunset, or solar noon. ◆ Wake Alarm by Sleep Duration Choose how long you want to sleep and dynamically wake after that long. ◆ Sleep Window by Sunset or Sunrise Set your sleep window in relation to sunset or sunrise. ◆ Custom Alarm Tones Choose from a curated set of calming default tones, or pick your own. Wake the way you want to wake. ◆ Calendar View A calendar grounded in the cyclical energies that shape the earth. With calendar integrations like Google Calendar. ◆ Privacy-Respecting Your data stays on your phone. Solar position based time is in tune with the rhythms you experience. Sun Based Time gives you a reference so you can increase your awareness of the relationships between cycles. ~~~~~~~~~~~~~~~~ From sunset, sunrise.

Screenshots

Twinkle Clock4 screens
Sun Based Time4 screens

Verdict

The call

The clearest difference is in-app purchases: Sun Based Time at none against Twinkle Clock's 1. Sun Based Time also leads on iOS requirement (15.1 vs 17.0). 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. Twinkle Clock sells 1 one-off in-app purchase. Sun Based Time asks for nothing beyond the download.

Scorecard2 real differences · 7 level
Twinkle Clock versus Sun Based Time: the parameters behind the verdict, then further details
ParameterTwinkle ClockSun Based Time
PriceFreeFree
Rating—4.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyEvery 3 weeks—
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPad, Mac, Vision Pro — betteriPhone, iPad, iPod
Requires iOS17.015.1 — better
Further details — not scored
Size23 MB57 MB
Age rating4+4+
DeveloperHiroyasu HiraiJAVED SHAH

In-app purchases

1 purchases

Twinkle Clock

One-time1
  • Twinkle Clock Pro$24.99
None

Sun Based Time

No in-app purchases

Questions

Is Twinkle Clock free?
Twinkle Clock is free to download, with in-app purchases available.
Is Sun Based Time free?
Sun Based Time is free to download, with no in-app purchases.
Do Twinkle Clock or Sun Based Time have ads?
Neither Twinkle Clock nor Sun Based Time shows ads.

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