Definition
A lightweight, secure data format used to transmit verified information between systems - often employed to authenticate subscription status between a user's device, your backend, and third-party tools.
JWTs are commonly used to: authenticate API requests from the app to your backend, pass entitlement information securely between systems, verify App Store server notifications (Apple signs notifications with JWTs), and communicate subscription status to third-party services. They are compact, self-contained, and can be verified without database lookups.
Yes, when implemented correctly. JWTs are cryptographically signed, meaning they cannot be tampered with without the private key. Use RS256 or ES256 signing algorithms, set short expiration times (minutes to hours, not days), and never store sensitive data (like credit card numbers) in JWTs. For subscription status, JWTs are the industry standard.
An API key is a simple static credential that grants access to an API. A JWT is a structured, signed token that contains claims (data) about the user and has an expiration time. JWTs are more secure and flexible because they carry user context (like subscription tier) and expire automatically, while API keys are static and require server-side validation for every request.
A product development and positioning framework that focuses on the core "job" a user hires your app to accomplish - such as helping them sleep better, get fit, or manage tasks. JTBD is especially useful for defining value propositions, onboarding flows, and pricing models that resonate with target users.
A dynamic paywall strategy that displays the subscription prompt exactly when a user attempts to access premium content or features. This approach increases conversion by showing the paywall at a moment of high intent, when the value of the subscription is most clearly felt.
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