Comparison

Retro vs Twinkle Clock

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

Head to head

Clock made of twinkling stars

Free

🌟 Lifestyle

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About

Retro

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Retro는 감정 기록이 가능한 캘린더 기반의 투두 리스트 앱 입니다. 하루의 생산성에 대한 회고를 감정 스티커로 남겨 일상을 더욱 생산적이게 지내보세요. # 기능 Retro는 레트로 느낌을 살린 심플하지만 정갈한 디자인을 적용했습니다. 캘린더 기반의 투두 리스트는 할 일을 보다 정리하기 편리하게 해주고, 감정 스티커로 남기는 하루의 생산성에 대한 회고는 동기부여를 해줍니다. # 피드백 앱 이름인 Retro는 레트로(retro) 느낌을 살린 생산성을 회고(retrospect)하는 앱이라는 의미에서 중의적으로 지어졌습니다. 앱이 만족스럽다면 앱스토어 리뷰에 피드백을 남겨주세요. 긍정적인 리뷰는 서비스 운영에 큰 힘이 됩니다!

About

Twinkle Clock

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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.

Screenshots

Retro4 screens

Twinkle Clock4 screens

Verdict

The call

The clearest difference is in-app purchases: Retro at none against Twinkle Clock's 1. Retro also leads on update cadence (every 4 days vs fortnightly). On price, ads, device support and iOS requirement 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. Retro asks for nothing beyond the download.

UpkeepUpdate frequency

Retro ships an update every 4 days, Twinkle Clock fortnightly. The most recent releases landed on October 16, 2026 and October 8, 2026 respectively.

Scorecard2 real differences · 4 level

Retro versus Twinkle Clock: the parameters behind the verdict, then further details
Parameter	Retro	Twinkle Clock
Price	Free	Free
Update frequency	Every 4 days — better	Fortnightly
Ads	No	No
In-app purchases	No — better	Yes
Devices	iPhone, iPad, Mac	iPhone, iPad, Mac, Vision Pro — better
Requires iOS	17.0	17.0
Further details — not scored
Size	5 MB	23 MB
Age rating	4+	4+
Developer	Hohyeon Moon	Hiroyasu Hirai

In-app purchases

None

Retro

No in-app purchases

1 purchases

Twinkle Clock

One-time1

Twinkle Clock Pro$24.99

Questions

Is Retro free?

Retro is free to download, with no in-app purchases.

Is Twinkle Clock free?

Twinkle Clock is free to download, with in-app purchases available.

Do Retro or Twinkle Clock have ads?

Neither Retro nor Twinkle Clock shows ads.

Which is updated more often, Retro or Twinkle Clock?

Retro ships an update every 4 days, and Twinkle Clock fortnightly. Most recently, Retro was updated on October 16, 2026 and Twinkle Clock on October 8, 2026.