Kalender Sync vs SimplyBook.me
Kalender Sync and SimplyBook.me are both scheduling & calendar tools. Kalender Sync is aimed at freelancers and small businesses, while SimplyBook.me is aimed at small businesses and freelancers. Both have a free plan.
German-hosted calendar sync across providers, with AI assistant access
Online booking system with payments and POS for service businesses
| Pricing | Freemium | Freemium |
| Starting price | Not published | Not published |
| Free plan | Yes | Yes |
| Free trial | 7 days | 14 days |
| Built for | Freelancers, Small businesses | Small businesses, Freelancers |
| Platforms | web | web, ios, android |
| Country | DE | CY · 2009 |
| Rating | — | — |
Choose Kalender Sync if
Freelancers and consultants in Europe who need GDPR-compliant sync across Google, Outlook, iCloud and German mail providers.
- Covers German providers that most sync tools ignore
- Privacy-friendly default shares busy time only
- GDPR DPA included even on the Free plan
Look elsewhere if: Teams wanting AI task scheduling or central admin for many users (Reclaim, Ridian).
Choose SimplyBook.me if
Small and mid-sized appointment-based service businesses that want booking, payments, memberships and light POS in one tool.
- Very broad feature set for a booking tool at this price
- Free plan is permanent, not just a trial
- Payments, POS and memberships remove the need for separate tools
Look elsewhere if: Knowledge workers who only need a meeting link or solo users who want the simplest setup (Calendly, Acuity Scheduling).
Kalender Sync vs SimplyBook.me pricing
Kalender Sync
- Free€02 accounts, 1 sharing, Google and Outlook only, 100 AI credits
- Basic€5/mo3 accounts, 5 syncs, all providers; 2 months free yearly
- Professional€12/moUnlimited accounts and syncs, 18 months ahead, 2,000 credits
SimplyBook.me
- Free€050 bookings/mo, 1 provider, 1 custom feature
- Basic€13.9/mo€11.9/mo billed annually; 100 bookings, 5 providers
- Standard€29.9/mo€24.9/mo billed annually; 500 bookings, 15 providers
- Premium€59.9/mo€49.9/mo billed annually; 2,000 bookings, 30 providers
- EnterpriseCustomCustom booking volume and providers; contact sales
Kalender Sync · Key features
- One-way or two-way sync between calendars at different providers
- Supports Google, Outlook, iCloud, GMX, WEB.DE, mailbox.org and kSuite
- Busy-only, title and time, or full-detail visibility per sync
- Real-time webhooks for Google and Outlook, 5-minute polling for others
- MCP server for Claude, ChatGPT, Cursor, Zapier and n8n
- Per-calendar AI permissions with a logged history of actions
Cons
- Prices listed only in euros
- Free plan cannot sync your own calendars with each other
- Non-Google, non-Outlook providers update about every five minutes
SimplyBook.me · Key features
- Mobile-optimised booking website plus embeddable widget for your own site
- Multi-provider and multi-location calendars with service-level rules
- Online payments via Stripe, PayPal, Square, Apple Pay and Google Pay
- Point-of-sale module with Tap to Pay, QR codes and payment links
- Booking through Google, Facebook, Instagram and a branded client app
- Packages, memberships, gift cards, coupons and loyalty as add-on features
Cons
- Admin panel is cluttered and has a learning curve
- Monthly booking caps force upgrades for busy businesses
- SMS credits, custom domain and SMS gateway cost extra
Kalender Sync vs SimplyBook.me: FAQ
Do Kalender Sync and SimplyBook.me have a free plan?
Yes, both Kalender Sync and SimplyBook.me have a free plan; paid plans add more usage and features.