Professional HTML mini-apps for freelancers and families. One payment. Instant download. Works offline. Yours permanently. No subscriptions. No cloud. No accounts.
What PayOnceApps sells
PayOnceApps sells downloadable HTML software tools. Each product is a single HTML file you purchase once and own permanently. The file runs entirely in your browser — offline, without internet, without any external services. No subscription required. Ever.
Lock 1
Offline-first. Works without internet. Always.
Lock 2
API-free. No data ever leaves your device.
Lock 3
Single-file. No install. Works in any browser.
Invoice Boss
Professional invoicing. Client database. PDF export. All offline, all private, all yours.
Calm Budget
Anxiety-free household budgeting. Your financial data stays on your device.
Leave your email. One message when the doors open. Nothing else.
All sales are final. PayOnceApps products are DRM-free digital downloads. Once you receive your download link, the file is yours permanently — there is no server-side access to revoke. Because of this, we cannot offer refunds after the file has been delivered. Every product page shows exactly what you are getting — features, screenshots, and a live demo — before you purchase. You know what you are buying before you buy it. Questions before purchase? Email us: support@payonceapps.com