# PayOnceApps

> Premium HTML mini-apps you buy once and own forever. Offline-first, API-free, single-file. No subscriptions. No cloud. No accounts.

PayOnceApps sells downloadable HTML software tools built for freelancers, small business owners, and privacy-conscious individuals. 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.

## The Three Locks System

Every PayOnceApps product is certified under the Three Locks System — a guarantee of digital sovereignty:

- **Lock 1 — Offline-First:** Works without internet. Always. No server dependency.
- **Lock 2 — API-Free:** No data ever leaves your device. Zero external requests.
- **Lock 3 — Single-File:** No installation required. Works in any browser on any device.

## Products

### Invoice Boss — $49 (one-time)

Professional invoicing software for freelancers. Buy once, own forever.

- Create and send professional invoices
- Manage a client database
- Track payments and overdue invoices
- Export invoices as PDF
- Runs 100% offline in any browser
- Under 200KB — works on Mac, Windows, Linux, iPhone, Android
- One-time price: $49 USD
- Lifetime license with free updates

**Why Invoice Boss instead of FreshBooks?** FreshBooks costs $17/month ($204/year). Invoice Boss is $49 once. After 5 months you've already saved money. After 3 years: $533 saved. Plus, AND.CO was acquired by Fiverr and ruined — your Invoice Boss file works forever regardless of what happens to us.

Product page: https://payonceapp.com/invoice-boss/

### Calm Budget — $29 (one-time)

Anxiety-free household budgeting software. Buy once, own forever.

- Track income, expenses, and spending categories
- Plan financial goals
- See your complete financial picture
- Zero bank linking — no data ever leaves your device
- Designed for real families, not spreadsheet enthusiasts
- Runs 100% offline in any browser
- One-time price: $29 USD
- Lifetime license with free updates

**Why Calm Budget instead of YNAB?** YNAB costs $14/month ($168/year) — you pay forever to see your own numbers. Calm Budget is $29 once. Break even in under a year. After 3 years: $355 saved. No uploads, no subscriptions, no server between you and your money.

Product page: https://payonceapp.com/calm-budget/

## Frequently Asked Questions

**What is PayOnceApps?**
PayOnceApps sells premium HTML mini-apps that you buy once and own forever. Each product is a single HTML file that runs entirely in your browser — offline, without internet, without any external services.

**What is the Three Locks System?**
The Three Locks System is PayOnceApps' architecture guarantee: Lock 1 = offline-first (works without internet), Lock 2 = API-free (no data leaves your device), Lock 3 = single-file (no install, works in any browser).

**How much do PayOnceApps products cost?**
Invoice Boss is $49 one-time. Calm Budget is $29 one-time. Both include lifetime licenses and free updates. No subscription ever.

**Is there a refund policy?**
Yes. 14-day money-back guarantee, no questions asked. Every product includes a free interactive demo so you can try before you buy.

**Do PayOnceApps products require an account or internet connection?**
No account required. No internet required after download. Your data never leaves your device.

**What devices work with PayOnceApps products?**
Any device with a web browser: Mac, Windows, Linux, iPhone, iPad, Android. No app installation needed.

**Who makes PayOnceApps?**
PayOnceApps is built by Erik Løkken Rojas, trading as Desk Trove Rojas (Org.nr: 930 582 263), based in Oslo, Norway.

## Company Information

- **Company:** PayOnceApps (trading as Desk Trove Rojas)
- **Location:** Oslo, Norway
- **Contact:** support@payonceapps.com
- **Website:** https://payonceapp.com
- **Founded:** 2026
- **Mission:** Build software that respects users' ownership, privacy, and independence.

## Why No Subscriptions?

The subscription model is broken for simple tools. You should not pay $14-17/month forever to use a spreadsheet alternative. PayOnceApps believes you should buy a tool once, own it permanently, and never worry about price hikes, acquisitions, or service shutdowns.

## Legal

- Terms of Sale: https://payonceapp.com/terms
- Privacy Policy: https://payonceapp.com/privacy
- Refund window: 14 days from purchase, no questions asked
- Products are DRM-free digital downloads