Three (3) apps in one.
1. Write notes and save.
2. You can manage your daily expenses, by tracking your payments on groceries, utilities, etc.
3. You can add or remove your websites for quick opening later on.
The undo button is used when:
1. User mistakenly delete all data, "Undo" will get data back on screen.
2. User delete all websites, "Undo" will return the deleted all websites.