How to save my data (4G) on my iphone to last through out a month?

I only have a certain amount of data(4G) on my iPhone and I want it to last throughout the month til it gets renewed but i don't know what to do

Up the amount of gb you could use.It'll cost a bit more, but it's worth it. Wi-Fi also works. Using Wi-Fi is free, and doesn't use up any data.

Connect to Wi-Fi as much as possible. Stay of streaming (youtube, netflix etc)

To save data on your iPhone, all you have to do is download the free app, "Onavo Extend"! It will compress the data you use on your smartphone and send it through Onavo, thus saving data! Its also safe and secure to use, so try it out now!