The Stripe iOS SDK make it easy to collect your users' credit card details inside your iOS app. By creating [tokens](https://stripe.com/docs/api#tokens), Stripe handles the bulk of PCI compliance by preventing sensitive card data from hitting your server (for more, see [our article about PCI compliance](https://support.stripe.com/questions/do-i-need-to-be-pci-compliant-what-do-i-have-to-do)).
We also offer [seamless integration](https://stripe.com/apple-pay) with [Apple Pay](https://www.apple.com/apple-pay/) that will allow you to securely collect payments from your customers in a way that prevents them from having to re-enter their credit card information.
We've written a [guide](https://stripe.com/docs/mobile/ios) that explains everything from installation, to creating payment tokens, to Apple Pay integration and more.
For more fine-grained information on all of the classes and methods in our SDK, consult our [full SDK reference](http://stripe.github.io/stripe-ios/docs/index.html).
1. If you haven't already, sign up for a [Stripe account](https://dashboard.stripe.com/register) (it takes seconds). Then go to https://dashboard.stripe.com/account/apikeys.
2. Replace the `stripePublishableKey` constant in CheckoutViewController.swift (for the Simple app) or Constants.m (for the Custom app) with your Test Publishable Key.
3. Head to https://github.com/stripe/example-ios-backend and click "Deploy to Heroku" (you may have to sign up for a Heroku account as part of this process). Provide your Stripe test secret key for the STRIPE_TEST_SECRET_KEY field under 'Env'. Click "Deploy for Free".
4. Replace the `backendBaseURL` variable in the example iOS app with the app URL Heroku provides you with (e.g. "https://my-example-app.herokuapp.com")
After this is done, you can make test payments through the app and see them in your Stripe dashboard. Head to https://stripe.com/docs/testing#cards for a list of test card numbers.
To add card scanning capabilities to our prebuilt UI components, you can simply [install card.io](https://github.com/card-io/card.io-iOS-SDK#setup) alongside our SDK. You'll also need to set `NSCameraUsageDescription` in your application's plist, and provide a reason for accessing the camera (e.g. "To scan cards").
To try this out, you can run `./install_cardio.rb`, which will download and install card.io in Stripe iOS Example (Simple). Now, when you run the example app on a device, you'll see a "Scan Card" button when adding a new card.
