Functions

1. Registration

1.1. Sign In

1.2. Sign up

1.2.1. enter email and password

1.2.2. with VK

1.2.3. with FB

1.2.4. with Google

2. Add To-Do

2.1. Choose Jobs

2.1.1. Return Plans

3. VIew Plans

3.1. Select To-Do

3.1.1. Choose skills to study

3.1.1.1. Recommended books

3.1.1.1.1. Library box

3.1.1.2. Recommended tutorials

3.1.1.2.1. Links

3.1.1.3. Recommended lectures

3.1.1.3.1. Links & ppt

4. Database

4.1. Creation

4.1.1. Tables

4.1.1.1. Relationship with tables

4.2. Connection with app(web & android)

4.3. Sending and receiving data