# Build Get instructions on how to model your subscription prices, connect and customize a checkout, create invoices, and work with subscriptions. --- ## Featured - [Build and deploy a complete Next.js app](https://developer.paddle.com/get-started/starter-kits/nextjs-saas.md): Build a Next.js app with a localized pricing page, inline checkout, and customer management screens. - [Create products and prices](https://developer.paddle.com/build/products/create-products-prices.md): Build your catalog of products and prices to start billing. - [Open an overlay checkout](https://developer.paddle.com/build/checkout/build-overlay-checkout.md): Turn any element into a checkout link, letting Paddle handle the entire checkout process. - [Add a hosted checkout to your iOS app](https://developer.paddle.com/build/mobile-apps/link-out-mobile-app-hosted-checkout-app.md): Add Paddle's hosted checkout to your iOS app. - [Integrate the customer portal for subscription management](https://developer.paddle.com/build/customers/integrate-customer-portal.md): Let customers view invoices, update payment details, and manage subscriptions. - [Upgrade or downgrade a subscription](https://developer.paddle.com/build/subscriptions/replace-products-prices-upgrade-downgrade.md): Change a customer's plan mid-cycle with prorated billing. ## All pages - [Setup checklist](https://developer.paddle.com/build/set-up-checklist.md) - [Go-live checklist](https://developer.paddle.com/build/go-live-checklist.md) ### Products - [Create products and prices](https://developer.paddle.com/build/products/create-products-prices.md) - [Localize prices](https://developer.paddle.com/build/products/offer-localized-pricing.md) - [Create and manage discounts](https://developer.paddle.com/build/products/offer-discounts-promotions-coupons.md) ### Checkout - [Build a pricing page](https://developer.paddle.com/build/checkout/build-pricing-page.md) - [Build an overlay checkout](https://developer.paddle.com/build/checkout/build-overlay-checkout.md) - [Build an inline checkout](https://developer.paddle.com/build/checkout/build-branded-inline-checkout.md) - [Pass checkout settings](https://developer.paddle.com/build/checkout/set-up-checkout-default-settings.md) - [Pass or update checkout items](https://developer.paddle.com/build/checkout/pass-update-checkout-items.md) - [Prefill checkout properties](https://developer.paddle.com/build/checkout/prefill-checkout-properties.md) - [Handle checkout success](https://developer.paddle.com/build/checkout/handle-success-post-checkout.md) - [Present saved payment methods](https://developer.paddle.com/build/checkout/saved-payment-methods.md) - [Brand inline checkout](https://developer.paddle.com/build/checkout/brand-customize-inline-checkout.md) - [Open a checkout for an upsell](https://developer.paddle.com/build/checkout/upsell-checkout.md) - [Recover abandoned checkouts](https://developer.paddle.com/build/checkout/checkout-recovery.md) - [Work with custom subdomains](https://developer.paddle.com/build/checkout/custom-subdomains.md) ### iOS checkouts - [Overview](https://developer.paddle.com/build/mobile-apps.md) - [Add a hosted checkout](https://developer.paddle.com/build/mobile-apps/link-out-mobile-app-hosted-checkout-app.md) - [Build a custom workflow](https://developer.paddle.com/build/mobile-apps/link-out-mobile-app-custom-workflow.md) ### Invoices - [Create and issue an invoice](https://developer.paddle.com/build/invoices/create-issue-invoices.md) - [Cancel an invoice](https://developer.paddle.com/build/invoices/cancel-invoices.md) ### Transactions - [Create a transaction](https://developer.paddle.com/build/transactions/create-transaction.md) - [Set your default payment link](https://developer.paddle.com/build/transactions/default-payment-link.md) - [Bill for non-catalog items](https://developer.paddle.com/build/transactions/bill-create-custom-items-prices-products.md) - [Pass a transaction to a checkout](https://developer.paddle.com/build/transactions/pass-transaction-checkout.md) - [Revise billed customer details](https://developer.paddle.com/build/transactions/revise-transaction-customer-details.md) - [Change collection mode](https://developer.paddle.com/build/transactions/change-collection-mode-transaction.md) - [Refund or credit a transaction](https://developer.paddle.com/build/transactions/create-transaction-adjustments.md) - [Work with custom data](https://developer.paddle.com/build/transactions/custom-data.md) ### Subscriptions - [Add or remove items](https://developer.paddle.com/build/subscriptions/add-remove-products-prices-addons.md) - [Upgrade or downgrade](https://developer.paddle.com/build/subscriptions/replace-products-prices-upgrade-downgrade.md) - [Bill for one-time charges](https://developer.paddle.com/build/subscriptions/bill-add-one-time-charge.md) - [Change billing dates](https://developer.paddle.com/build/subscriptions/change-billing-dates.md) - [Update payment details](https://developer.paddle.com/build/subscriptions/update-payment-details.md) - [Pause a subscription](https://developer.paddle.com/build/subscriptions/pause-subscriptions.md) - [Cancel a subscription](https://developer.paddle.com/build/subscriptions/cancel-subscriptions.md) - [Provision your app](https://developer.paddle.com/build/subscriptions/provision-access-webhooks.md) ### Trials - [Create a cardless trial](https://developer.paddle.com/build/trials/cardless-trials.md) - [Work with trials](https://developer.paddle.com/build/trials/update-trials.md) - [Extend or activate a trial](https://developer.paddle.com/build/trials/extend-activate-change-date-trials.md) ### Retain - [Set up Paddle Retain](https://developer.paddle.com/build/retain.md) - [Configure recovery and dunning](https://developer.paddle.com/build/retain/configure-payment-recovery-dunning.md) - [Build cancellation surveys](https://developer.paddle.com/build/retain/configure-cancellation-flows-surveys.md) - [Proactively upgrade plans](https://developer.paddle.com/build/retain/configure-term-optimization-automatic-upgrades.md) ### Customers - [Create or update a customer](https://developer.paddle.com/build/customers/create-update-customers.md) - [Work with credit balances](https://developer.paddle.com/build/customers/get-customer-credit-balances.md) - [Get customer portal links](https://developer.paddle.com/build/customers/integrate-customer-portal.md) ### Reports - [Generate reports](https://developer.paddle.com/build/reports.md) - [Adjustment line items](https://developer.paddle.com/build/reports/adjustment-line-items.md) - [Adjustments](https://developer.paddle.com/build/reports/adjustments.md) - [Discounts](https://developer.paddle.com/build/reports/discounts.md) - [Payout reconciliation](https://developer.paddle.com/build/reports/payout-reconciliation.md) - [Products and prices](https://developer.paddle.com/build/reports/products-prices.md) - [Transaction line items](https://developer.paddle.com/build/reports/transaction-line-items.md) - [Transactions](https://developer.paddle.com/build/reports/transactions.md)