Support
Questions, bug reports and suggestions all go to one place.
Email us at
Include your iPhone model and iOS version if something isn't working. We usually reply within a few days.
Common questions
Is Yakusugi free?
Yes. Everything in the app today is free. If we add paid features later, what you can use now will stay clear about what's included.
Do I need an account?
No. You can open the app and start straight away. Nothing you do in Yakusugi is tied to an account.
Where are my notes and progress stored?
On your device only. Notes, bookmarks, your streak and settings are saved on your iPhone and are never sent to us.
I think an answer is wrong. What should I do?
Email [email protected] with the name of the drill or case study and the cell you're looking at. A screenshot helps. We check every report.
How do I turn off daily reminders?
Open the side menu, go to App Settings and switch off reminders. You can also turn off notifications for Yakusugi in iOS Settings.
How do I delete my data?
Clear your notes in App Settings and reset your profile in Account Settings. Deleting the app removes everything it stored.
Is this financial advice?
No. Yakusugi is for learning. The companies and figures in it are fictional or simplified for teaching.