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All right. So welcome to a brand-new module and I'm going to show you what you'll be making by
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the end of this module.
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The app that we're going to be building and improving upon throughout this module is a To-Do list app.
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And it's inspired by one of my favorite to-do list apps which is the clear app. And what it allows you
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to do is to create new to-do lists,
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for example, your travel to-do list, and it shows up as individual color to-do list. And you can select
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one of them to go into that particular list and add new items to it.
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For example, "Buy Apples," "Buy Pears."
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And you'll see that as you add new items, your to-do list start staking on this beautiful gradient going
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from lighter to darker as you add new items.
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Now, you will be able to check these items off, but you'll also be able to swipe to delete them.
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Now, you'll be able to search your to-do list.
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For example, let's search for something like "Apple," hit search, and you see all the to-do list items that
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contain that word.
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And the best part of all is that all of this data is saved and persisted locally on the simulator or
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on your physical iPhone device.
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So that means that if you go ahead and terminate your app, say, if your app got updated or if your iOS
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version got updated, or if you bought a new phone, then all of your user's data is persisted on the device
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with no internet connection required.
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And if we have a look inside Shopping List, we still have all of our items.
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So that is what we're going to learn all about in this module. And in the process, you're going to learn
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about all the different ways that you can persist data locally, including user defaults for small bits
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of data, or things like quotable where if you want to tap into the documents folder inside your iPhone,
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and be able to save items there, and you'll also gonna  learn about using Core Data with a sequel like back in
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database, and you're going to be creating a relational database of your own to power your to-do list
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app.
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And finally, I'm going to show you how you can do everything that you can do with Core Data by using one
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of my favorite services which is called Realm.
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And by the end of this, you will have created a relational database as a backend and you're going to
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learn about how you can code up the front end to make it look as beautiful as we have here.
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So I hope you're excited because I'm really excited.
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So once you're ready, get started over on the next lesson.