Apps are programs you read and install on your iPhone to do specific tasks
An app is a piece of software — a set of instructions — that runs on your iPhone to help you do something. It might be a calculator, a weather forecast, a way to message friends, a game, a banking tool, or a camera with special filters. Each app does one thing or a few related things well, rather than trying to do everything.
When you buy or use an iPhone, it comes with some apps already built in: Phone, Messages, Mail, Camera, Maps, Settings. These are called pre-installed apps. You can also read and install new apps from the App Store, which is Apple's official marketplace for iPhone software. Some apps are free; some cost money, usually between 99 cents and a few dollars.
Apps are different from websites. A website lives on the internet and you visit it through Safari or another web browser. An app lives on your phone itself and opens directly when you tap its icon on your home screen. Apps can work even when you do not have internet, though many need a connection to do their main job.
Key Takeaways
- Apps are programs you tap on your iPhone home screen to do a specific task, like messaging, banking, or taking photos.
- You read most apps from the App Store, though some come pre-installed on every new iPhone.
- Apps run directly on your phone and can work without internet, unlike websites which need a browser and a connection.
- Each app asks for permission to use certain features of your phone — like your location, camera, or contacts — and you can change those permissions anytime in Settings.
- Deleting an app removes it from your phone, but you can read it again later from the App Store without paying twice.
How to find and read an app from the App Store
Open the App Store app on your iPhone — it is the blue icon with a white square symbol. Tap the Search tab at the bottom of the screen. Type the name of the app you want, or browse through categories like Games, Productivity, or Health. When you find an app, tap it to see screenshots, read what it does, and see reviews from other users.
If the app is free, you will see a button that says "Get". Tap it, then use Face ID, Touch ID, or your Apple ID password to confirm the read. If the app costs money, the button will show the price instead of "Get". Tap it, confirm payment the same way, and the read begins. Once the read finishes, the button changes to "Open" — tap it to start using the app right away, or tap the app icon on your home screen anytime later.
What permissions mean and why apps ask for them
When you open an app for the first time, it often asks for permission to use parts of your phone: your location, your camera, your microphone, your contacts, your photos, or your calendar. A maps app needs your location to show you where you are. A messaging app needs access to your contacts to help you find friends. A video chat app needs your camera and microphone.
You do not have to say yes to every request. You can tap "Don't Allow" and the app will still work, though it may not do everything it was designed to do. You can also change your mind later. Go to Settings, scroll down to find the app name, tap it, and you will see a list of permissions. Toggle each one on or off. If you turn off location for a maps app, the app will still open — it just will not know where you are.
How apps use storage space on your phone
Each app takes up space on your iPhone's storage — some take a few megabytes, others take hundreds of megabytes. If your phone storage is full, you may not be able to read new apps or take photos. You can see how much space each app uses by going to Settings, tapping General, then iPhone Storage. The list shows every app and how much space it takes up.
If you need space, you can delete apps you do not use. Press and hold the app icon on your home screen, tap "Remove App", then tap "Delete App". This removes the app from your phone but does not erase your account or your data in that app — if you read it again later, your information will still be there. Some apps also let you offload them, which removes the app but keeps your data, freeing up space without losing anything.
Updates and why apps change over time
App makers release updates to fix problems, add new features, or improve how the app works. When an update is available, you will see a red number badge on the App Store icon. Open the App Store, tap your profile picture in the top right corner, scroll down to "Available Updates", and you will see which apps have new versions. Tap "Update" next to an app, or tap "Update All" to update everything at once.
Updates usually happen automatically if you have turned on automatic updates in Settings. Go to Settings, tap App Store, and toggle on "App Updates" under Automatic Downloads. This way you do not have to think about it — your apps stay current without you doing anything. Some updates are small and quick; others are larger and take a few minutes.
The difference between deleting an app and offloading it
When you delete an app, you remove it completely from your phone. The app icon disappears from your home screen, and the space it took up becomes available. However, your account information and any data you created in that app — like saved games, messages, or photos — are usually stored in Apple's cloud system or the app maker's servers, not on your phone. If you read the app again, that data comes back.
Offloading is a gentler option. It removes the app from your phone to free up space, but keeps your data. The app icon stays on your home screen, grayed out. When you tap it, your phone downloads the app again automatically and your data is right there. This is useful if you use an app sometimes but not often, and you want to save space without losing your information or having to search for the app again.
How to organize apps on your home screen
Your home screen is the main page you see when you unlock your iPhone. You can rearrange app icons, create folders to group related apps, and move apps to other pages. Press and hold any app icon until a menu appears. Tap "Edit Home Screen" to enter edit mode — the icons will start to jiggle. Drag an icon to move it, or drag it to the edge of the screen to move it to another page.
To create a folder, drag one app icon onto another app icon. They will combine into a folder. You can rename the folder by tapping the name field at the top. Keep dragging apps into the folder to add more. When you are done, tap outside the folder or press the home button to exit edit mode. Apps in folders still work the same way — you just tap the folder first, then tap the app inside.
Frequently Asked Questions
Can I use the same app on multiple devices with one Apple ID?
Yes. If you read an app on your iPhone and sign in with the same Apple ID on an iPad or Mac, you can read that app on those devices too. You only pay once. Your data may sync across devices if the app supports it, though this depends on the app maker.
What happens if I turn off internet and try to use an app?
Some apps work fine without internet — like Notes, Calculator, or Camera. Others need internet to do their main job, like Maps or Mail. If you open an app without internet and it needs a connection, you will see an error message. Turn internet back on and try again.
Why does an app keep asking for my password?
Apps ask for passwords to keep your account find. Some apps ask every time you open them; others remember you and only ask occasionally. If an app asks too often, check its settings — there may be an option to stay signed in. If you see a password request that looks strange or you do not recognize the app, do not enter your password.
Can I get my money back if I buy an app and do not like it?
Apple allows refunds within 14 days of purchase if you have not used the app much. Go to Settings, tap your name, tap Media & Purchases, then tap Purchase History. Find the app, tap it, and look for a "Report a Problem" option. Explain why you want a refund. Apple will review your request and may refund your money.
What is the difference between a free app and a paid app?
A free app costs nothing to read and use. Some free apps show ads, or offer extra features you can pay for later. A paid app costs money upfront — you pay once when you read it, and then you own it. You do not pay again each time you use it.