🔒 Your data never leaves your phone.
The simplest and most affordable billing app for freelancers, psychologists, therapists, consultants, coaches — and everyone who works by appointment.
Your calendar becomes your billing source. No double entry, no second system — TimeInvoicer reads your appointments and generates professional invoices in seconds. Completely offline, on your device.
The fastest path from work to billing: tap the calendar event, check the preview, then print, save or share the PDF.
Client, date, service and fee come directly from your appointments.
Add, remove or adjust line items directly in the document preview.
Scan incoming invoices and categorize expenses automatically.
Outstanding invoices, payments and invoice numbers stay easy to review.
From your calendar to a finished invoice — no learning curve, no double entry, no second system.
Use your regular Google or Samsung calendar. No new system, no new app for scheduling — just keep doing what you already do.
TimeInvoicer recognizes the service type from your calendar entry, prepares matching line items and creates the invoice automatically.
Share a professional PDF invoice via email, WhatsApp or printer. One minute — and you can get back to what you do best.
No feature bloat, no cluttered interface. Just the tools freelancers and self-employed professionals actually use every day.
No retyping, no double entry. Your system calendar is the data source — create an invoice with 1 Click directly from any appointment.
Define custom hourly rates, service types and prices. Flexibly adaptable to any industry — from coaching to construction.
Automatic service recognition from calendar entries, smart billing defaults and voice input — less typing, more working.
Invoices with your own logo and letterhead. Send directly via email, WhatsApp or printer — your client sees nothing but quality.
Revenue overview at a glance, outstanding invoices instantly visible, automatic 3-stage payment reminders for overdue accounts.
End-to-end encrypted backup. CSV and PDF export for your accountant and tax office — everything prepared and ready.
As a self-employed professional, you bear responsibility for sensitive client data. TimeInvoicer was built with privacy as the foundation — not as an afterthought, not as a marketing promise.
All invoices, contacts and client data stay exclusively on your device. No server, no upload, no third parties. Period.
You use your own local Android calendar — no external server sees your appointments. Your data stays exactly where it belongs: on your device.
On demand, TimeInvoicer automatically creates anonymized calendars — without client names. Sync appointments across devices via Google Calendar & Co., coordinate rooms or align with colleagues. Full accessibility, full privacy.
Optional backups are end-to-end encrypted. The key is generated locally on your device — even we cannot decrypt your data.
No Google Analytics, no ad SDKs, no crash reporting with personal data. Uninstall the app = all data deleted.
All core features work completely offline. No server dependency, no outages — whether you are on-site with a client, at a job site, or on the go.
Developed in Austria with a focus on protecting personal data. No data transfers, no cloud requirement — all data stays locally on your device.
Your data stays safe. See for yourself.
Try it now →Works completely offline · All data stays local
Web tools cost monthly fees, require constant internet and force you into their own calendars. TimeInvoicer simply uses yours.
| Feature | TimeInvoicer | sevDesk | lexoffice | FreshBooks |
|---|---|---|---|---|
| Calendar Integration | ✓ System Calendar | ✗ No Calendar | ✗ No Calendar | ✗ No Calendar |
| Starting Price | Free | €8.90/mo | €7.90/mo | $15/mo |
| Offline-Capable | ✓ Fully | ✗ Web-only | ✗ Web-only | ✗ Web-only |
| Native App | ✓ Android | ⚠ Web + App (Cloud) | ⚠ Web + App (Cloud) | ⚠ Web + App (Cloud) |
| Data Local (GDPR) | ✓ On Device | ⚠ Cloud | ⚠ Cloud | ⚠ Cloud (USA) |
| Smart Features | ✓ Built-in | ✗ No | ✗ No | ✗ No |
TimeInvoicer is constantly improved with your feedback. Share your experience and help other freelancers find the right tool.
Start free and upgrade only when you feel the value. No hidden costs, cancel monthly.
Available on Google Play from mid-April 2026
Available on Google Play from mid-April 2026
⭐ Founder's Price
99 € / year
For the first 100 users — lifetime locked. Secure it once, never pay more.
From installation to your hundredth invoice — personal support from the developer, not a call center.
Comprehensive help built right into the app and available as a download. Step-by-step instructions for every feature.
Open Guide →When you first open each screen, an interactive tour shows you all the key features. No manual needed.
Personal support from the developer. No chatbot, no hold queue — real answers to real questions.
All features at a glance — ready to print, share or bring to your next conference.
View Brochure →Connect with other freelancers, request features and share your best tips. Your feedback flows directly into development.
Visit the Forum →🔒 Your data never leaves your device. GDPR-compliant by Design.
Try free on Google Play →Available on Google Play from mid-April 2026
