SMS reminders, invoicing and staff rostering for Google Calendar™. Bulk-arm a week of appointments, invoice from your events, get paid.
Listing updated:September 3, 2026
Works with:
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Overview
Automated SMS appointment reminders, invoicing and staff rostering — all from Google™ Calendar.

Calendar Force turns the calendar you already schedule in into the system that runs your business: bulk text reminders to cut no-shows, invoices generated from your events, job photos from the field, and payment matching when the remittance lands. No migration, no separate booking system, no CRM to learn.

One Google sign-in covers this add-on and the web app at app.calendarforce.com.

REMINDERS — IN GOOGLE™ CALENDAR (THIS ADD-ON)

Every other SMS reminder add-on makes you open each event and set the reminder individually. If you run 100+ jobs a week, that is the problem. Calendar Force arms a whole week in one pass.

• Bulk set or remove reminders across a date range — one template, every event
• Single-event reminders from the event details panel, editable per event
• Optional fixed send time for a whole batch
• Phone numbers read automatically from the event description and validated for your country
• Live credit balance with an overdraft warning, consent handling and a blocked-number list

SCHEDULING AND STAFF — IN THE WEB APP

• Assign staff to a week's jobs in bulk by colour code instead of editing every event
• Add assistant staff alongside the lead worker on any job
• Staff directory and per-staff calendars
• Your jobs, clients and history are held in a Google Sheet in your own Drive — but you never work in the spreadsheet. Calendar Force renders the log for you, showing the right columns for each type of work

INVOICING AND GETTING PAID

• Invoices generated from the event details rather than retyped, on your own branded templates
• Bulk invoicing across a whole period, or automatically as work completes
• Job photo portal — your crew uploads a photo from the field, it is matched to the event, the invoice is generated and emailed to the right recipient in about thirty seconds
• Service rates and job costs held against your clients
• Remittance matching — drop in a remittance PDF from any payer and it reconciles line by line against your logs by invoice number, marking off what has been paid
• Overdue follow-ups, a daily job digest, and end-of-financial-year rollover

DIFFERENT TYPES OF CLIENT, SIDE BY SIDE

• Separate logs for private jobs, company clients with group codes, and funded-care clients — each invoiced its own way, all in one place

FOR AUSTRALIAN PROVIDERS: NDIS AND AGED CARE, BUILT IN

• The NDIS support catalogue built in — item numbers, registration groups, units and price limits by state, so line items are picked from the real catalogue rather than typed from memory
• NDIS-specific invoicing and a dedicated NDIS log
• Remittance reconciliation built for provider RCTIs

YOUR DATA STAYS YOURS

The service log lives in a Google Sheet in your own Drive, not in someone else's database. Cancel and you keep everything.

Built for service businesses that live in their calendar — maintenance, cleaning, lawn care, trades, mobile and home services, support work — and just as usable by clinics, salons and consultants who only want the reminders.

PRICING

SMS credit packs start at AUD 9.99, charged per message segment. Invoicing uses separate invoice tokens — every account starts with 20 free, and token packs start at AUD 2.20. Subscription plans are available for higher volume. No monthly fee required.

PRIVACY & SECURITY

Calendar Force only accesses the calendar events you explicitly choose to work with. We do not store, share, or sell your calendar data. Our use of Google Calendar data complies with the Google API Services User Data Policy.

Support: admin@calendarforce.com   Website: calendarforce.com

Google™ is a trademark of Google LLC.
Additional information
PricingFree of charge with paid features
Developer
Privacy policy
Terms of service
CalendarForce: SMS & Invoices for Google Calendar™ will ask for the permissions shown below. Learn more
CalendarForce: SMS & Invoices for Google Calendar™ will need access to your Google account
This will allow CalendarForce: SMS & Invoices for Google Calendar™ to :
See and download any calendar you can access using your Google Calendar
View and edit events on all your calendars
Run as a Calendar add-on
See the events you open in Google Calendar
Edit the events you open in Google Calendar
Connect to an external service
View your country, language, and timezone
See your primary Google Account email address
See your personal info, including any personal info you've made publicly available
Associate you with your personal info on Google
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ACACIA Services
September 3, 2026
Disclosure: I'm the developer. I built Calendar Force for my own business before releasing it. I've used Google Calendar as a rostering tool for ten years. On a normal week I've got 100+ jobs in it, and every SMS reminder add-on I tried made me individually set the reminder for each event one at a time. That's the entire reason this exists — I wanted to arm a whole week in one pass. That's what the add-on does. The other half of the problem was everything downstream of the event. Assigning the right staff to the right jobs used to mean editing every event individually; now a roster goes onto a week's events in one go. Staff are assigned to an event based off of their colour code. Invoices come off the event details rather than being retyped, with a Sheet as the service log. Our field portal uploads a job photo, matches it to the event, generates the invoice and emails it to the right recipient in about thirty seconds. That part lives in the web app, not this add-on. Worth being clear on what it isn't: not a booking system, not a CRM. It sits on top of the calendar you already run your work out of. Happy to help anyone getting set up — admin@calendarforce.com. Tobias, ACACIA Services.
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