licensing free-tier privacy
Licensing Without License Keys
A free tier with no identity is an infinite free tier. When to skip license keys entirely, how keyless activation works, and where the privacy line sits.
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Licensing, pricing, and selling your apps direct, whatever you built them with.
licensing pricing teams
Selling to Teams: Seats, Invoices, and Purchase Orders
The first company that wants ten copies of your app will not be blocked by your code. It gets blocked by seats, invoices, and procurement. Here is what to build.
licensing pricing upgrades
Paid Upgrades: How to Charge for Version 2
You sold a perpetual license and shipped two years of free updates. Now you need revenue again. Version-window licensing is the honest way to charge for v2.
licensing subscriptions product
Free Is the Floor: What Your App Does When Someone Stops Paying
Most desktop apps hard-lock when a subscription lapses. That is hostile to the customer, and it recovers worse than a reduced free state. Here is how to design one.
dotnet csharp license-keys offline
License Keys for .NET Apps: Desktop and Server with Keylight
Add .NET license key checks to a WPF, WinUI, or MAUI app with one NuGet package, and validate keys from ASP.NET over HTTPS. No licensing server to build or babysit.
unity csharp license-keys games
License a Unity Game Without a Backend: UPM, IL2CPP, Launch Config
Unity game licensing in an afternoon: install Keylight over UPM, build IL2CPP and WebGL safe, read your trial length from the dashboard at launch, play offline.
cpp license-keys offline signed-config
Keylight for C++: One Header, No Backend, Signed Settings
A C++ license key library in one header. Drop keylight_single.hpp into any project and ship license keys, offline checks, and dashboard-owned settings with no server.
rust tauri license-keys upgrades
Rust App Licensing: One Crate, the Tauri Plugin, No Blocked UI
License a native Rust app or a Tauri app with one crate. Activate, validate, and refresh entitlements after an upgrade without ever blocking the main thread.
electron nodejs javascript license-keys signed-config
Licensing Electron and Node Apps: Signed Config, Pinned Keys
Electron app licensing with one JavaScript package. Run the SDK in main, verify leases in Node, and sign config so an edited settings file never opens a paid tier.
api license-keys cli go python
License Your App With No SDK: The Keylight API Path
A license key API for stacks with no first-party SDK. Mint a runtime token with one CLI command, then call activate and validate over HTTPS from Go or Python.
subscriptions billing churn
Dunning for Desktop Apps: When a Card Fails, Don't Lock the App
A failed card is not a cancellation. Here is the retry window that actually recovers revenue, and what your app should show instead of a lock screen.
onboarding licensing stripe
The First 60 Seconds After Purchase
Post-purchase onboarding software gets ignored while everyone optimizes checkout. Here is the license delivery flow, second by second, and the races it has to survive.
email deliverability licensing
License Emails That Actually Reach the Inbox
The license key email is the one message standing between a completed payment and a working app. Here is how to make sure it lands in the inbox.
support customer-portal licensing
Let Customers Fix Their Own License Problems
Support only you can perform does not scale past your waking hours. What to hand over for self-serve license management, and how to verify identity without accounts.
support licensing activation
"My License Key Doesn't Work": A Support Triage Playbook
A license key not working is a symptom, not a diagnosis. Here is the triage tree that turns a vague complaint into a specific reason code in one reply.
analytics telemetry licensing
Which Version and Platform Are Your Paying Users Actually On?
Your licensing layer already calls your server on every activation. Send app version, OS major, and platform along with it and stop guessing about deprecation.
licensing automation cli
Four Licensing Jobs You Can Stop Doing By Hand
Issuing beta keys, catching refunded licenses, backing up your license set, and answering support emails — as CLI commands you can schedule or hand to a coding agent.
licensing cli building-in-public
Why I Made Keylight Drivable By A Coding Agent
The four decisions that made licensing scriptable — no prompts, environment secrets, a separate exit code, and confirm gates — and what each one cost.
CLI Licensing Developer tools
Manage Your App Licensing From the Terminal
A dashboard needs a human with a mouse. A licensing CLI does not — so your coding agent can issue a key, check usage, or revoke a license without you.
licensing piracy metrics
How Much Piracy Do You Actually Have? Measure Before You Fix
Your software piracy rate is a guess: a cracked build has the license check removed, so it never phones home. Here is what you can actually observe instead.
reference glossary licensing
The macOS Licensing Glossary: 25 Terms for Mac Developers
A reference glossary for Mac developers — license keys, activations, leases, refund flows, signing, and SDK runtime terms, each linked to deeper reading.
analytics licensing metrics
The 9 Licensing Metrics Every App Business Should Track
Your Stripe dashboard shows revenue. It says nothing about whether licenses activate, validate, or quietly fail. Here are the nine licensing metrics worth watching.
swift macos sdk
License Verification at App Launch: A Swift Walkthrough
How checkOnLaunch() resolves the license on a SwiftUI Mac app and the six states your UI needs to handle: trial, licensed, limited, freeTier, expired, and invalid.
pricing trials free-tier
Free Tier, Trial, or Paid: Designing Mac App Licensing Tiers
How to choose between a keyless free tier, a time-bound trial, and paid tiers for a Mac app — and the Keylight configuration that maps to each.
audio-plugins juce cpp license-keys offline
Offline Licensing for Your VST/AU Plugin Without a Backend
Add offline licensing to a JUCE plugin with Keylight — activate from the editor, gate pro features in processBlock via a lock-free atomic, no backend.
support customer-portal licensing
Reducing License Activation Support Tickets for Solo Mac Developers
Three activation tickets solo Mac developers answer on repeat and how the Keylight portal handles each without your involvement — plus the canned redirect email template.
unreal-engine cpp license-keys offline
License Your Unreal Engine Game Offline in an Afternoon
Add offline licensing to an Unreal Engine game with the Keylight C++ plugin — drop it into Plugins/, configure UKeylightSubsystem, and activate from Blueprints or C++.
electron javascript license-keys
How to Add License Keys to an Electron App
A step-by-step guide to licensing an Electron app with Keylight — run the SDK in the main process, bridge activation over IPC, and gate features by entitlement.
tauri rust license-keys
How to Add License Keys to a Tauri App
How to add license keys to a Tauri v2 app with the Keylight plugin — register it in Rust, grant its capability, and call activate and validate from your frontend.
cross-platform architecture license-keys
Licensing a Cross-Platform App from One Control Plane
How to license a cross-platform app from one Keylight tenant — the same signed-lease format and Ed25519 verification across the Swift, JavaScript, Rust, and Tauri SDKs.
migration gumroad stripe
Moving Your App's Licensing Off Gumroad
How to move your app licensing off Gumroad to Stripe and Keylight without breaking existing keys — import your customers, switch new sales, and bootstrap devices.
rust offline license-keys
Offline License Validation in Rust
How offline license validation works in Rust with the keylight crate — verify an Ed25519-signed lease locally with no network call, bounded by an offline grace window.
pricing subscriptions licensing
One-Time vs Subscription Licensing: Which to Use?
One-time vs subscription licensing for your app — how each affects revenue, support, and trust, and how Keylight models perpetual keys and renewing subscriptions.
subscriptions billing licensing
Subscription Licensing for Mac Apps: Renewals, Upgrades, Downgrades
How Keylight models a Mac app subscription — the lease, the Stripe subscription, the renewal boundary, and the upgrade or downgrade path between tiers.
tauri electron license-keys
Tauri vs Electron for Licensed Desktop Apps
Tauri vs Electron for a desktop app you plan to sell — the real differences in core language and bundle size, and where license verification should live in each.
ed25519 cryptography license-keys
What Is Inside a Keylight Lease: The Ed25519 Format Explained
A Keylight lease is a signed JSON document, not an opaque license string. Here is the field-by-field anatomy and how Ed25519 verification protects every field.
licensing macos swift stripe
How to Add Licensing to a Mac App
The fastest way to add licensing to a Mac app: a payment provider for money, Keylight for licensing, a Swift SDK you drop in. The alternatives too.
stripe webhooks licensing
How Stripe + Keylight Issues a License: The Webhook Pipeline
Inside the pipeline that turns a Stripe Checkout payment into a signed license key in seconds — what fires, what gets minted, and what idempotency you get for free.
Migration Licensing
How to Import an Existing Customer Base into Keylight
Import an existing customer base into Keylight from a CSV — preserve the keys customers already have, skip duplicates, and avoid forcing anyone to repurchase.
Migration Licensing
Migrate License Keys Without Breaking Existing Customers
Switching your licensing shouldn't break a single customer. Here's how to migrate license keys into Keylight while every existing key keeps working.
vision roadmap licensing
The future of Keylight: one licensing layer for every stack
Keylight started Apple-first. Today it licenses any app you sell, in Swift, Rust, JavaScript, C++, or C#, or with no SDK at all. What shipped and where it goes next.
macos keychain sparkle
Persisting Mac App Licenses Across Auto-Updates
Why licenses stored outside the .app survive when Sparkle or any updater replaces the bundle — and the three-step test to verify your update path before shipping.
macos sandbox keychain
Does Keylight Work in Sandboxed Mac Apps?
How Keylight handles the macOS App Sandbox: where the SDK keeps license state by default, the entitlements you actually need, and the Mac App Store edge case.
macos distribution licensing launch
How to Launch a Mac App Outside the App Store
A step-by-step playbook for launching a Mac app outside the App Store — signing, payments, licensing, updates, support, and launch day.
macos device-activations license-keys
How Device Activation Limits Work for Mac Apps
How Mac apps can use device activation limits to reduce license sharing without punishing customers who own a laptop and desktop.
macos keychain license-keys
How to Store a Signed License Token in the macOS Keychain
A practical guide to storing a signed license token in the macOS Keychain, what belongs in Application Support, and how offline validation uses it.
macos stripe paddle lemon-squeezy
Paddle vs Lemon Squeezy vs Stripe for Mac App Licensing
How Paddle, Lemon Squeezy, and Stripe fit into Mac app licensing, where checkout ends, and why license keys still need a dedicated layer.
macos developer-id license-keys
Developer ID vs License Keys for Mac Apps
Developer ID and license keys solve different Mac app problems: safe installation, paid access, device activations, offline validation, and refunds.
stripe macos license-keys
Stripe Webhooks for macOS License Keys
How Stripe webhooks turn a Mac app purchase into a license key: checkout completion, idempotent key creation, subscriptions, refunds, and Keylight.
swift macos license-keys
How to Add License Keys to a Swift macOS App
A step-by-step guide to adding license keys to a Swift macOS app — trial, activation, entitlement checks, and the UI states, using the KeylightSDK.
pricing macos
The Mac Developer's Guide to Pricing in 2026
How to price an Mac app in 2026 — one-time vs subscription, tiered pricing, lifetime deals, and structuring pricing that scales with your audience.
licensing scaling architecture
Why Software Licensing Gets Hard When Apps Scale
The simple license check you wrote at launch quietly becomes a liability as an app grows. Here is where licensing breaks at scale, and how to design around it.
licensing architecture offline
What Happens When Your Licensing Server Goes Down
If your licensing server goes down, can your customers still open their apps? How to design licensing so an outage never becomes a customer-facing failure.
pricing macos trials
Building a Paywall That Doesn't Suck
Paywall design patterns for developer tools and Mac apps — placement, messaging, tier presentation, and reducing friction so the purchase feels fair, not hostile.
macos swift security
Where to Store License Data on macOS
Keychain, UserDefaults, or an encrypted file: where should a Mac app keep license data? The options, their security tradeoffs, and a sensible default.
macos trials pricing
From Trial to Paid: Conversion for Mac Apps
How to convert free-trial users into paying customers for a Mac app — trial length, reminder timing, in-app prompts, and the licensing that makes it all work.
keylight licensing paddle
Why I Built My Own Licensing SDK Instead of Using Paddle
A founder note on why Keylight exists — the licensing gaps in Paddle, Gumroad, and Lemon Squeezy that pushed me to build a dedicated layer on top of Stripe.
pricing paddle licensing
The Hidden Cost of 'Free' Licensing
Merchant-of-record platforms bundle licensing into a revenue share. Here is the real math on a $50k app — and why the case for unbundling is not the fee.
ai licensing architecture
Building a Modern Licensing System for AI Apps
How to license AI apps the right way — separating the app license from metered AI usage, signed keys for on-device models, and seat-based licensing for teams.
paddle stripe distribution
Migrating from Paddle to Stripe
A practical guide to migrating from Paddle to Stripe — what changes, how to handle tax and licensing, and how to move customers without breaking their apps.
licensing license-keys macos
How Device Activations Work
How device activations work in software licensing — fingerprinting, activation limits, the activate and deactivate flow, and idempotency that keeps it fair.
licensing stripe license-keys
What Happens After a Refund in Licensed Software
What should happen to a license key after a refund or chargeback — automatic revocation, how it reaches the app, and why offline apps revoke on a delay.
license-keys licensing security
How to Prevent License Key Sharing
How to prevent license key sharing without punishing legitimate customers — device activation limits, fingerprinting, and choosing graceful limits over hard blocks.
offline licensing macos
How Offline License Validation Works
A plain-English explanation of how offline license validation works — verifying a signed license locally with a public key, and why desktop apps need it.
license-keys licensing security
How License Keys Work for Desktop Apps
A clear explanation of how modern license keys work for desktop apps — from old checksum keys to cryptographically signed leases your app can verify offline.
Migration Licensing
Migrating Your App's Licensing to Keylight
Why and how to migrate your app's licensing to Keylight — from a merchant-of-record service or a homegrown system — and the tradeoffs to weigh before you switch.
macos distribution licensing
How to Sell a Mac App Outside the App Store
A practical walk-through of selling a Mac app directly — distribution, notarization, payments, and licensing — and an honest look at the tradeoffs against the App Store.
stripe paddle pricing
Stripe vs Paddle vs Lemon Squeezy for Developers
A practical comparison of Stripe, Paddle, and Lemon Squeezy for solo app developers — fees, tax handling, customer ownership, licensing, and which to pick when.
keylight licensing
Welcome to the Keylight blog
A short introduction to what the Keylight blog is for — practical writing about licensing, distribution, and shipping paid desktop apps.