How to use Castiron's Tap To Pay App on iPhone

With Castiron's Tap to Pay on iPhone app, you can accept in-person contactless payments, right on your iPhone — from physical debit and credit cards, to Apple Pay and other digital wallets — no extra terminals or hardware needed. It’s easy, secure, and private.

What is Tap to Pay?

Tap to Pay is a technology that allows users to make payments by tapping or hovering their contactless card or NFC (Near Field Communication)-enabled device over a payment terminal. It’s a fast, secure, and convenient way to handle transactions.

How does Tap to Pay work?

Tap to Pay uses Near Field Communication (NFC) technology, a wireless system that enables data transfer between devices that are close to each other. The customer’s payment details are securely stored on the NFC chip and sent to the merchant’s terminal for approval. This method is quick, secure, and doesn't need physical contact between the card or smartphone and the payment terminal.

Getting started is easy

To use Tap to Pay on iPhone, simply download the Castiron app, sign up, and start accepting in-person, contactless payments anytime, anywhere—right on your iPhone.

• System Requirements: An iPhone with NFC capabilities (iPhone XS or later) and iOS 15 or later, though we recommend updating to the latest available for best results. There is also a Tap to Pay on Android App available.

• Download here on the App Store: https://apps.apple.com/us/app/castiron/id6502452799

  

• After clicking "Get" to download the app, you'll log in with your Castiron Email and Password.

• Go through any prompts that come up, click next, and you'll be taken to the Home page:

• You're ready to take payments! Click "Charge a Card" to begin.

  • You'll be taken to the "Create a Payment" screen.
  • Here you can add the amount to charge, a description for the sale (optional), and a customer (optional).
  • You can either select from your customer contact list in Castiron, or add a new one.
  • Then click "Next" at the bottom.

• The next screen will show the total payment with the transaction fees added.

• When the next screen pops up, and you see "Hold Here to Pay," you can ask your customer to hold their card or device close to your device to "tap" to pay.

• You're done!

• Having trouble or need assistance? Email us anytime at [e-mail]

FAQ

• Where is my payment being deposited?
  • All payments you accept with Tap to Pay on iPhone are processed by Stripe and then deposited to the account or card you've set up with them.
• What device can I use?
  • Tap to Pay on iPhone requires iPhone XS or later, and iOS 15 or later, though we recommend updating to the latest available for best results. We also have a Tap to Pay on Android App.
• What payment types can I accept?
  • With Tap to Pay on iPhone, you can accept any form of contactless payment, including Apple Pay on iPhone and Apple Watch, other digital wallet and payment services, and contactless debit and credit cards.
• Can I accept transactions that require a PIN number?
  • Tap to Pay on iPhone allows payment service providers to enable PIN-based transactions in iOS 16.0 and later.
  • After the customer taps their card, Tap to Pay on iPhone prompts the customer to enter their PIN using Apple's secure PIN entry interface.
• Will using Tap to Pay affect the battery life of my device?
  • No. Tap to Pay on iPhone won't have a noticeable impact on battery life.
• What if a contactless payment card is not being read?
  • The performance of contactless cards can vary based on the card design, such as the card material or the location of the antenna. As a result, some cards connect more easily than others. Try the following to ensure a successful card read:
    • First, ask the customer to hold their contactless payment card directly on the device with the chip on the left side and the longer side of the card lined up with the edge of the tap area for several seconds.
    • If the card still doesn't read, ask the customer to slide the card to center the chip directly over the notch on the device.
    • If the contactless card remains unread without any feedback from the interface, the card might have a damaged antenna or might not work with contactless payments.
• Tap to Pay FAQ from Apple: https://register.apple.com/tap-to-pay-on-iphone/faq/

More to know

Secure Payments: Tap to Pay on iPhone uses the built-in security and privacy features of iPhone to help keep your customer's data private and secure. When a payment is processed, Apple doesn’t store card numbers or PIN information on the device or on Apple servers, so you can rest assured knowing your business stays yours.

Privacy: When using Tap to Pay on iPhone, all photo, video, screenshot, and screen-recording features are paused on the artisan's iPhone—so customers have peace of mind knowing their card number or PIN information won’t be recorded. Apps in the background are also momentarily blocked to prevent the tracking of digits while a customer enters their PIN information on the merchant’s iPhone.

Additional Resources:

Payment options/How to accept: https://developer.apple.com/tap-to-pay/how-to-accept-payments/

Tap to Pay FAQ from Apple: https://register.apple.com/tap-to-pay-on-iphone/faq/

Free Apple Pay merchant decal: https://www.applepaysupplies.com

Free contactless payment decals: https://www.charge-it-now.com/free-supplies/