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What TimeInvoicer Does for You

Quick Start — 3 Steps to Your First Invoice

1. Grant calendar permission
   When you first open TimeInvoicer, the app asks for calendar access. Tap Allow. This is how the app reads your appointments — nothing is uploaded anywhere.
2. Choose your invoice folder
   Menu → Settings → Invoice Directory
   Select the folder where your PDFs will be saved (e.g. Documents/Invoices).
3. Create a test invoice
   Tap any calendar appointment → Invoice → Preview → Create PDF. Done. Check the result — if layout and signature look good, you are ready.

Appointment Format (Important!)

For the app to automatically extract the right data, your calendar events should follow this simple pattern:

The Invoice Flow at a Glance

Creating a Local Calendar

Option A — Universal: "Offline Calendar" App

The simplest method that works on every Android phone, no account required:

1. Install "Offline Calendar"
   Open the Google Play Store and search for Offline Calendar (by Dominik Schürmann). Install it.
2. Create a local calendar
   Open the app → tap Add Calendar → give it a name (e.g. Practice) → pick a color → Save.
3. Open TimeInvoicer
   The new calendar appears in the calendar list. Assign it as your default calendar (see Chapter 4).

Option B — Samsung

1. Open the Samsung Calendar app.
2. Tap the hamburger menu (☰) → Manage calendars.
3. Tap + Add calendar → choose Phone as the storage location.
4. Enter a name (e.g. Practice), pick a color, and save.

Option C — Google Pixel / Stock Android

Stock Android does not support local calendars out of the box. You have two choices:

Option D — Huawei (no Google Play)

1. Open the built-in Calendar app.
2. Tap Settings → Manage accounts & calendars.
3. If a local "Phone" calendar is listed, you are done. If not, tap Add account and choose a CalDAV or Exchange account.
4. Alternatively, sideload the Offline Calendar APK from a trusted source like F-Droid.

Option E — Xiaomi / Redmi

1. Open Settings → Accounts & Sync.
2. Add a Google account if you have one, or install the Offline Calendar app.
3. Open the MIUI Calendar app → tap the gear icon → make sure the new calendar is visible.

Option F — Google Calendar (Cloud Sync)

If you want your appointments synced across multiple devices (phone, tablet, PC), Google Calendar is the easiest option:

1. Open your phone's Settings → Accounts.
2. Tap Add account → Google.
3. Sign in with your Google account (or create one).
4. Tap the new account → make sure Calendar sync is enabled.
5. To create additional calendars, visit calendar.google.com → "Other calendars" → + Create new calendar.
6. Return to TimeInvoicer — the calendars appear automatically.

The 3-Calendar Strategy

The Three Calendars

Why Three Calendars?

How TimeInvoicer Handles This

Once you assign the three calendars in the settings (see Chapter 4), TimeInvoicer automatically:

• Copies every new appointment to the Backup Calendar
• Copies an anonymized version to the Anonymous Backup Calendar
• Keeps all three in sync when you edit or delete an appointment

Configuring Calendars in TimeInvoicer

Assign Calendar Roles

1. Open Calendar Settings
   Menu → Settings → Calendar → Calendars & Colours
2. Set your Standard Calendar
   Tap the calendar you use for client appointments and assign the label Standard Calendar.
3. Set your Backup Calendar (optional but recommended)
   Tap a second calendar and assign the label Backup Calendar.
4. Set your Anonymous Backup Calendar (optional)
   Tap a third calendar and assign the label Anonymous Backup Calendar.

Calendar Colours

You can assign a custom color to each calendar. This helps you distinguish work appointments from personal ones at a glance in the week view.

Which Calendars Are Visible?

TimeInvoicer shows all calendars registered in the Android system. If a calendar does not appear:

• Check that the calendar is visible in your phone's calendar app
• Check that Calendar sync is enabled for the account (Settings → Accounts → your account)
• If using a local calendar, ensure the Calendar Storage system app is enabled

Creating Your First Invoice

Path A — From the Calendar (Recommended)

1. Tap a calendar appointment in TimeInvoicer.
2. Tap Invoice.
3. The client name, service, date, and amount are pre-filled from the event.
4. Choose the billing period (from / to) to include multiple appointments.
5. Review the service table — adjust if needed.
6. Tap Preview to see the finished invoice.
7. Tap Create PDF.

Path B — Manual Entry

1. Menu → Invoices → New Invoice
2. Select a client.
3. Tap Add Service and enter the details.
4. Continue with Preview → Create PDF.

What Gets Saved

When you tap Create PDF, the app automatically saves three files:

Sending the Invoice

After creating the PDF, tap Share to:

• Email the invoice as a PDF attachment
• Print it directly
• Share via any Android share target (Messenger, Drive, etc.)

Privacy & Security — Why TimeInvoicer Is Safer Than Web Apps

How TimeInvoicer Protects Your Data

TimeInvoicer vs. Web-Based Billing Apps

Does TimeInvoicer Need an Internet Connection?

No. All features including automatic suggestions and voice recognition work directly on your device. No patient data ever leaves your phone. The entire app functions fully offline.

Time Savings — Calculated

How much time do you actually save with TimeInvoicer? Let us do the maths for a typical solo practice.

The Scenario: 80 Invoices per Month

A clinical psychologist with a full practice sees roughly 20 clients per week, 4 sessions each per month = 80 sessions = 80 invoices.

Over a Year

EPC QR Code — Patient Scans, Payment Is Pre-Filled

Setting Up Your Bank Details

1. Open bank settings
   Menu → Settings → Bank Details & Invoice
2. Enter your IBAN
   The app validates the format automatically.
3. Optional: BIC and account holder
   Required for cross-border SEPA payments.
4. Enable QR Code on Invoice
   Toggle on QR Code on Invoice.
5. Save
   From now on, every invoice you generate will include the QR code.

What the QR Code Contains

How Your Clients Use It

FAQ / Troubleshooting

Calendar Issues

Invoice Issues

Email & SMS Issues

General Tips

Contact & Support

Get in Touch

When Contacting Support

To help us resolve your issue quickly, please include:

• App version (Menu → About)
• Phone model and Android version
• Short description of the problem (what you expected vs. what happened)
• Anonymized PDF if the issue is invoice-related (never send the real PDF with client data!)

Free trialing

Install TimeInvoicer from Google Play and test Pro free for 14 days:

Start free trial →