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CheckCheck is a super simple to-do app that leaves only 'today's tasks.'

Write down your tasks, and check them off with a single tap once you've completed them. Your daily completion records accumulate neatly in a grass-style heatmap.

◆ How to Use It

Write down your tasks for the day in the morning.

Tap to check off each one as you finish it.

At the end of the day, the grass turns green according to your completion rate.

The desire to fill in the blanks leads to action tomorrow.


The desire to fill in the blanks leads to action tomorrow.

◆ Key Features

• Today's Checklist — Adding, deleting, and reordering takes only seconds

• One-Tap Check — Toggling Completed/Incomplete is all you need to do

• Progress Display — See at a glance how many items you have completed out of today

• Grass Heatmap — Displays the last 15 weeks of completion records in 5 levels of green

• View Past Records — Tap a grass box to check the day's to-do list

• Daily Repeat — Register daily tasks just once

• Home Screen Widget — Check today's progress and grass without opening the app

• Daily Reminder — Check notifications at your desired time

• Themes & Grass Colors — Light/Dark modes, choose grass colors to suit your taste

• Export Data — Back up your records to a file

◆ What's Missing Is Also a Feature

No deadlines. No priorities. No categories or tags. No sign-up or login.

If you have ever given up on a to-do app because you were tired of complicated settings, CheckCheck takes the opposite approach.

'Today + Check + Grass' — These three things are all there is.

◆ Privacy

All data is stored only on your device. It sends nothing to a server, and no account is required.

◆ Recommended for:

• Those who used to-do apps for a few days but gave up because managing them was a hassle

• Those who want to turn their habits into visible records

• Those who enjoy the fun of filling up the "grass"—a feeling developers know

• Those who want to lightly start a "God-Life" or "Miracle Morning"

Start by writing down just one task for today.

Tomorrow's grass will be a little darker than today's.