Three foundations for keeping it up

The hardest part of exam prep is doing it every day. Chuju Tore brings practice, review, and records together so the daily habit sticks.

Daily practice

Practice you can fit into a short session, so studying becomes a habit. What to do today is already decided — just start.

Turn mistakes into review

Missed questions aren't lost — they come back for review, so "couldn't do it" turns into "can do it."

Records that add up

How much you've done and how you did stays as a record, so effort is visible. The more you keep going, the more the progress shows.

More highlights

Start right away — no account required
Study data stays on-device (never sent externally)
No ads and no tracking whatsoever
Lightweight, made for short spare moments
A simple screen children can use with confidence
Study records that keep you going

Chuju Tore Plus

Go further.

The core features are free. For families who want to go deeper, Plus is available as a subscription.

Unlock every level

Take on every level of the drills, calculation tricks, and Japanese practice.

Your full history & charts

Look back at time and accuracy trends from the very first day.

Support development

Helps fund new training modes and features.

Plus can be subscribed to and canceled anytime from within the app.

Why I built this

Entrance exam success isn't decided on one special day — it's built from the quiet accumulation of everyday effort. But keeping that up every day is the hardest part.

Even with good materials, deciding what to do today, when to review missed questions, and how much has piled up — working that out each time was a burden for children and parents alike.

Chuju Tore brings practice, review, and records into one place and leaves only the "flow that keeps going." No account needed, and your data stays on the device — so you can focus on the daily study with peace of mind.

— MRCY

FAQ

How much can I use for free?

The core features are free to use. If you'd like every level and your full history, you can subscribe to Plus.

How do I cancel Plus?

Plus is an auto-renewing subscription. You can cancel anytime from your App Store account settings. Turn off auto-renewal at least 24 hours before the end of the current period to avoid the next charge. See the Terms of Use for details.

Do I need an account?

No. Download and start right away. Study data is stored only on your device and is never sent to our servers.

Is it safe for children to use?

Chuju Tore contains no ads or tracking and collects no personal information. Study data is stored on-device only. See the Privacy Policy for details.

Where is my data stored?

Study history, scores, progress, and similar data are all stored on your device. Nothing is sent externally. Uninstalling the app deletes the on-device data.