# RetentionEngine > Knowledge base documentation for RetentionEngine. ## v1 - [RetentionEngine Overview](https://docs.bellwethr.com/docs/getting-started-overview.md) - [Billing and Plans](https://docs.bellwethr.com/docs/billing-plans.md) - [Go Live Walkthrough](https://docs.bellwethr.com/docs/getting-started-go-live.md) - [Connect to Subscription Platform](https://docs.bellwethr.com/docs/connect-subscription-platform.md) - [Cratejoy API Key](https://docs.bellwethr.com/docs/finding-your-api-key-cratejoy.md) - [Cratejoy Code Snippet](https://docs.bellwethr.com/docs/deploying-retentionengine-cratejoy.md) - [Cratejoy Testing](https://docs.bellwethr.com/docs/cratejoy-testing.md) - [Cratejoy Coupons](https://docs.bellwethr.com/docs/cancel-resolutions-cratejoy-coupons.md) - [Cratejoy Customer Context](https://docs.bellwethr.com/docs/cratejoy-customer-context.md) - [ReCharge API Key/Token](https://docs.bellwethr.com/docs/recharge-api-key.md) - [ReCharge Code Snippet](https://docs.bellwethr.com/docs/deploying-retentionengine-recharge.md) - [ReCharge Testing](https://docs.bellwethr.com/docs/recharge-testing.md) - [ReCharge Customer Context](https://docs.bellwethr.com/docs/recharge-customer-context.md) - [ReCharge Product Swap Cancel Resolution](https://docs.bellwethr.com/docs/recharge-product-swap-cancel-resolution.md) - [Need help? Add us to your Shopify](https://docs.bellwethr.com/docs/adding-a-bellwethr-staff-account-to-shopify.md) - [ReCharge Multiple/Bundle Subscriptions Docs](https://docs.bellwethr.com/docs/recharge-multiplebundle-subscriptions-docs.md) - [Bold Subscriptions API Key](https://docs.bellwethr.com/docs/finding-your-api-key-bold-commerce.md) - [Bold Subscriptions Code Snippet](https://docs.bellwethr.com/docs/deploying-retentionengine-boldcommerce.md) - [Bold Subscriptions Testing](https://docs.bellwethr.com/docs/bold-subscriptions-testing-1.md) - [Chargebee API Key](https://docs.bellwethr.com/docs/finding-your-api-key-chargebee.md) - [Chargebee Code Snippet](https://docs.bellwethr.com/docs/deploying-retentionenginechargebee.md) - [Stripe API Key](https://docs.bellwethr.com/docs/finding-your-api-key-stripe.md) - [Stripe Code Snippet](https://docs.bellwethr.com/docs/deploying-retentionengine-stripe.md) - [Stripe Testing](https://docs.bellwethr.com/docs/stripe-testing.md) - [Recurly API Key](https://docs.bellwethr.com/docs/finding-your-api-key-recurly.md) - [Recurly Testing](https://docs.bellwethr.com/docs/recurly-testing.md) - [WooCommerce Subscriptions Code Snippet](https://docs.bellwethr.com/docs/deploying-retentionengine-woocommerce.md) - [WooCommerce Subscriptions API Key](https://docs.bellwethr.com/docs/finding-your-api-key-woocommerce.md) - [WooCommerce Testing](https://docs.bellwethr.com/docs/woocommerce-testing.md) - [WooCommerce Coupons](https://docs.bellwethr.com/docs/cancel-resolutions-woocommerce-coupons.md) - [No System (Manual Engine)](https://docs.bellwethr.com/docs/deploying-retentionengine-no-system.md) - [Manual Engine Testing](https://docs.bellwethr.com/docs/manual-engine-testing.md) - [How to Test your RetentionEngine](https://docs.bellwethr.com/docs/testing.md) - [Preview The Experience](https://docs.bellwethr.com/docs/preview-the-experience.md) - [Analytics: The Reports](https://docs.bellwethr.com/docs/analytics-the-reports.md) - [Exit Survey Overview](https://docs.bellwethr.com/docs/getting-started-exit-survey.md) - [Conditional Logic ](https://docs.bellwethr.com/docs/conditional-logic.md) - [Cancel Resolutions Overview](https://docs.bellwethr.com/docs/cancel-resolutions-getting-started-1.md) - [Contextual Logic](https://docs.bellwethr.com/docs/cancel-resolutions-contextual-logic.md) - [Dynamic URL Redirect to Customer Portal](https://docs.bellwethr.com/docs/dynamic-url-redirects.md) - [Different Types of Cancel Resolutions](https://docs.bellwethr.com/docs/different-types-of-cancel-resolutions.md) - [Sneak Peek](https://docs.bellwethr.com/docs/sneak-peek.md) - [Discounts](https://docs.bellwethr.com/docs/discounts.md) - [Social Mission](https://docs.bellwethr.com/docs/social-mission.md) - [Resolutions for "Bought as a gift"](https://docs.bellwethr.com/docs/discount-for-the-gift-receiver.md) - [Tip on using the product](https://docs.bellwethr.com/docs/tip-on-using-the-product.md) - [Offer customer support](https://docs.bellwethr.com/docs/offer-custom-support.md) - [Loyalty discount](https://docs.bellwethr.com/docs/loyalty-discount.md) - [Share with a friend](https://docs.bellwethr.com/docs/share-with-a-friend.md) - [Importance of Self Care](https://docs.bellwethr.com/docs/importance-of-self-care.md) - [Testimonial](https://docs.bellwethr.com/docs/testimonial.md) - [Membership Perks](https://docs.bellwethr.com/docs/membership-perks.md) - [Manage settings/preferences](https://docs.bellwethr.com/docs/manage-settingspreferences.md) - [Apology](https://docs.bellwethr.com/docs/apology.md) - [Free Gift](https://docs.bellwethr.com/docs/free-gift.md) - [Explain the price](https://docs.bellwethr.com/docs/explain-the-price.md) - [Reward points](https://docs.bellwethr.com/docs/reward-points.md) - [New feature](https://docs.bellwethr.com/docs/new-feature.md) - [Pause Options Overview](https://docs.bellwethr.com/docs/pause-options.md) - [Default Style Editor](https://docs.bellwethr.com/docs/getting-started-style-editor-v-2.md) - [Adding Custom Fonts](https://docs.bellwethr.com/docs/adding-custom-fonts.md) - [Custom CSS Overview](https://docs.bellwethr.com/docs/custom-css.md) - [Custom CSS Examples](https://docs.bellwethr.com/docs/custom-css-examples.md) - [Customer Notifications](https://docs.bellwethr.com/docs/customer-notifications.md) - [Website URL (Redirect Link)](https://docs.bellwethr.com/docs/website-url-redirect-link.md) - [Changing the URL of your RetentionEngine](https://docs.bellwethr.com/docs/changing-the-url-of-your-retentionengine.md) - [Default Experience](https://docs.bellwethr.com/docs/default-experience.md) - [Embed Experience](https://docs.bellwethr.com/docs/embed-experience.md) - [URL Builder](https://docs.bellwethr.com/docs/url-builder.md) - [Cancelling Your Account](https://docs.bellwethr.com/docs/canceling-your-retentionengine-account.md) - [Bellwethr Terms & Conditions](https://docs.bellwethr.com/docs/bellwethr-terms-conditions.md) - [Uninstall RetentionEngine: ReCharge/Shopify ](https://docs.bellwethr.com/docs/uninstall-retentionengine-recharge.md) - [Referral Program Overview](https://docs.bellwethr.com/docs/referral-program.md) - [FAQ: Discounts](https://docs.bellwethr.com/docs/faqdiscounts.md) - [FAQ: Gifts](https://docs.bellwethr.com/docs/faq-gifts.md) - [How does RetentionEngine use AI to self optimize?](https://docs.bellwethr.com/docs/cancel-resolutions-how-it-works.md) - [If a customer changes their exit survey response, why doesn't the cancel resolution change?](https://docs.bellwethr.com/docs/if-a-customer-changes-their-exit-survey-response-why-doesnt-the-cancel-resolution-change.md) - [What's the optimal image size to use in RetentionEngine?](https://docs.bellwethr.com/docs/whats-the-optimal-image-size-to-use-in-retentionengine.md)