First make your way to the App Store.
Search for the app Insta Size.
Open the app and click the camera button. This will give you the option to use a photo in your library or snap a quick pic on your camera.
I'll be using the screenshot for step 1. All you have to do is press Insta Size and done! Now your photo is ready to be shared on Instagram or for you too save in your Photo Album.
The creator of this guide has not included tools