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.
Not happy? I offer a 14-day refund window — no questions asked. If you request a refund within 14 days of purchase, you'll get your money back in full. PayOnceApps products are DRM-free digital downloads. Every product page includes full feature descriptions, screenshots, and a free interactive demo so you can try before you buy. To request a refund, email us within 14 days of purchase: [email protected]