Comparison

LUMEN vs Todak Time

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

Head to head
About

LUMEN

Features
Read full description

LUMEN은 공부와 일상을 꾸준히 이어가고 싶은 사용자를 위한 집중 관리 및 기록 기반 애플리케이션입니다. 단순한 타이머 기능을 넘어, 하루의 흐름을 기록하고 스스로를 돌아볼 수 있도록 설계되었습니다. 공부를 시작하는 순간부터 하루를 마무리하는 순간까지, LUMEN은 사용자가 자신의 시간을 인식하고 관리할 수 있도록 돕습니다. 과목별 공부 시간을 측정하고, 하루 동안의 집중 흐름을 시각적으로 확인할 수 있으며, 기록 기능을 통해 학습 내용을 정리하고 스스로를 점검할 수 있습니다. LUMEN은 혼자 공부할 때 쉽게 흐트러지는 집중력을 보완하기 위해 그룹 기능을 제공합니다. 그룹 내에서 서로의 공부 상태를 확인하며, 함께 공부하고 있다는 심리적 동기를 통해 꾸준함을 유지할 수 있습니다. 프리미엄 기능을 통해 확장된 통계와 추가 기능을 제공하며, 사용자는 자신의 학습 패턴을 더 깊이 이해하고 효율적인 루틴을 만들어갈 수 있습니다. LUMEN은 수험생뿐만 아니라, 공부와 자기관리를 일상적으로 이어가고 싶은 모든 사용자를 위해 설계된 앱입니다. 하루를 포기하지 않도록 돕는 도구로서, 꾸준한 성장을 지원합니다.

About

Todak Time

This app helps you focus on your studies by tracking your time spent on each subject. It offers features like customizable goals, app blocking, and progress visualization to keep you on track. Plan your study sessions and monitor your progress with ease.

Highlights
  • Track study time by subject
  • Customizable goals and reminders
  • App blocking
  • Study planner with notes
  • Lock screen controls
  • Progress visualization (charts, heatmaps)
  • Exam countdowns
  • Home screen widget
Features
Read full description

Make every study session count. Todak Time is a focus timer that tracks your study time, subject by subject. No ads. No rankings. No comparisons. Just you and your studies. ■ Features · Track study time by subject with customizable goals · Get a Goal Reminder at the time you choose · App blocking (choose allowed apps) · Planner (checklist + notes) · Check and control your timer right from the Lock Screen · Visualize your progress with weekly charts and monthly heatmaps · Stay on track with exam countdowns · See today's study time and D-day on a Home Screen widget · Seamless iCloud sync across all your devices Quietly cheering you on, one session at a time. Feedback & support: ninemomo.public@gmail.com

Screenshots

LUMEN4 screens
Todak Time4 screens

Verdict

The call

The clearest difference is in-app purchases: LUMEN at none against Todak Time's 1. On price, update cadence, 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. Todak Time sells 1 one-off in-app purchase. LUMEN asks for nothing beyond the download.

UpkeepUpdate frequency

LUMEN ships an update every 9 days, Todak Time every 5 days. The most recent releases landed on September 18, 2026 and September 17, 2026 respectively.

Scorecard1 real difference · 8 level
LUMEN versus Todak Time: the parameters behind the verdict, then further details
ParameterLUMENTodak Time
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 9 daysEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.617.0 — better
Further details — not scored
Size28 MB8 MB
Age rating4+4+
DeveloperJaewhan NamkoongHyeon mo Gu

In-app purchases

None

LUMEN

No in-app purchases

1 purchases

Todak Time

One-time1
  • Todak Time Pro$2.99

Questions

Is LUMEN free?
LUMEN is free to download, with no in-app purchases.
Is Todak Time free?
Todak Time is free to download, with in-app purchases available.
Do LUMEN or Todak Time have ads?
Neither LUMEN nor Todak Time shows ads.
Which is updated more often, LUMEN or Todak Time?
LUMEN ships an update every 9 days, and Todak Time every 5 days. Most recently, LUMEN was updated on September 18, 2026 and Todak Time on September 17, 2026.

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