Comparison

Kigen ~ penguin task tracker vs Dueday

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

Head to head
About

Kigen ~ penguin task tracker

This app helps you manage tasks and meet deadlines with a simple interface. It uses color-coded indicators for due dates and a punctuality level system to motivate users. Receive timely notifications to stay on track.

Highlights
  • Task title, note, due date, and importance entry
  • Color-coded due date status indicators
  • Punctuality level system for motivation
  • Customizable deadline notifications
  • Simple task completion marking
Read full description

Kigen Tasks is a semi-task management scheduling app designed to help you enjoyably meet deadlines. Kigen (ζœŸι™) means due/ deadline in Japanese. There is a reason why I wrote "semi". This app is a little too simple to be called a scheduling app. All you need to enter is the title, a quick note, the due date, and the importance of the task. It is also very simple to use. When a task is completed, you just record it as completed. Completed tasks will disappear, but uncompleted tasks will stay on the list until they are completed, regardless of the passing days. Other features include ・Background colours as a due status indicator. When the background colour is green, it is safe! If you have an appointment within 5 days, it will turn yellow, for the next day's task it will turn orange, and on the same day or when an appointment has already passed the due date, it will turn red. ・Punctuality level If you complete a task earlier than the set due date, you will move up a level! On the other hand, if you miss the deadline, you will be downgraded. There is nothing special that happens just because the level is raised, but it is a nice feeling to see the number go up, so I hope you will make use of it to motivate yourself. ・Notification function Notifications are sent one week, five days, three days, two days, the day before, and the day of the deadline! This is why this app is too simple to be called a schedule app, instead, it is an app that was created with the focus on how to help you keep up with your deadlines simply and enjoyably. No more last-minute deadlines!

About

Dueday

Features
Read full description

Dueday is a simple, focused deadline countdown app. Add the dates that matter and see exactly how many days are left β€” at a glance, on your home screen, and right when you need a reminder. WHY DUEDAY Deadlines pile up: project due dates, exams, submissions, bills, trips, anniversaries. Dueday keeps them all in one place and counts down the days so nothing sneaks up on you. BIG, CLEAR COUNTDOWN Every deadline shows the days remaining as a bold D-day count (D-7, D-DAY, D+3). Your list is automatically sorted by the nearest due date, so the most urgent item is always on top. HOME SCREEN WIDGET Add the Dueday widget to your home screen and always see the days left for your next deadline β€” no need to open the app. The countdown updates every day on its own. REMINDERS Get a local notification before each deadline. Choose on the day, 1 day, 3 days, or 1 week before β€” per deadline. ORGANIZE YOUR WAY - Color-code each deadline - Add an optional note - Edit or delete any time PRIVATE BY DESIGN Dueday works fully offline. There is no login and no account. All your data stays on your device (local database) and is never uploaded. MADE TO BE EASY - Clean Material 3 design - Light and dark mode - English and Japanese - Free to use (contains ads) Add your first deadline and let Dueday count the days for you.

Screenshots

Kigen ~ penguin task tracker4 screens
Dueday4 screens

Verdict

The call

The clearest difference is in-app purchases: Dueday at none against Kigen ~ penguin task tracker's 3. Dueday also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Kigen ~ penguin task tracker sells 3 one-off in-app purchases. Dueday asks for nothing beyond the download.

UpkeepUpdate frequency

Kigen ~ penguin task tracker ships an update every 9 days, Dueday every 2 weeks. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

Scorecard2 real differences Β· 6 level
Kigen ~ penguin task tracker versus Dueday: the parameters behind the verdict, then further details
ParameterKigen ~ penguin task trackerDueday
PriceFreeFree
Positive reviews100.0% of reviewsβ€”
Update frequencyEvery 9 days β€” betterEvery 2 weeks
AdsYesNo β€” better
In-app purchasesYesNo β€” better
MonetizationFree with in-app purchasesβ€”
DevicesiPhoneiPhone
Requires iOS16.6 β€” better17.0
Further details β€” not scored
Size20 MB25 MB
Age rating4+4+
DeveloperTaito IikuraYuki Okawa

In-app purchases

3 purchases

Kigen ~ penguin task tracker

One-time3
  • Support Kigen App$1.99
  • Support Kigen App$4.99
  • Ads Free Plan$14.99
None

Dueday

No in-app purchases

Questions

Is Kigen ~ penguin task tracker free?
Kigen ~ penguin task tracker is free to download, with in-app purchases available.
Is Dueday free?
Dueday is free to download, with no in-app purchases.
Do Kigen ~ penguin task tracker or Dueday have ads?
Kigen ~ penguin task tracker shows ads; Dueday does not.
Which is updated more often, Kigen ~ penguin task tracker or Dueday?
Kigen ~ penguin task tracker ships an update every 9 days, and Dueday every 2 weeks. Most recently, Kigen ~ penguin task tracker was updated on November 4, 2026 and Dueday on November 5, 2026.

Other comparisons