You work with appointments? Then your calendar is already your billing source. TimeInvoicer turns calendar entries into professional invoices — for consultants, coaches, trainers, tradespeople and every appointment-based profession.
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, suggests 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, intelligent suggestions 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.
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) |
| AI Support | ✓ Built-in | ✗ No | ✗ No | ✗ No |
Feedback from the beta phase — from freelancers who use TimeInvoicer in their daily workflow.
From the ongoing beta phase — real testimonials will follow after launch
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
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 →Install TimeInvoicer for free, connect your calendar and experience how simple billing can be.
Sign Up as Beta Tester →Available on Google Play from mid-April 2026