# Nebulas Calendar > Explore Nebulas Calendar: multiple calendars, people and resources, availability, bookable slots, recurrence, notifications and operational control. - [Nebulas Calendar | Connected operational scheduling](https://calendar.nebulas-software.com/en/) ## Pricing - [Pricing](https://calendar.nebulas-software.com/en/pricing/): Standard pricing, starting at €100/month, per product and workspace. Prices in EUR, excluding VAT. Monthly starting prices; terms and the final price are confirmed in your quote. Pay month by month, or prepay 6 or 12 months and save on your subscription. 6 months upfront: Half a month free (Save 8.3%). 12 months upfront: 2 months free (Save 16.7%). The discount applies to recurring subscriptions and agreed users/modules. Usage, onboarding and third-party licences are separate. Full prepayment is due before the period starts. The price of your agreed configuration stays fixed for the paid period. - [Nebulas for startups](https://nebulas-software.com/en/startups/): From €50 a month per product for the first 12 months, then standard pricing from €100 a month. For startups under one year old, subject to application and review. ## Answers for coordinating availability and real work. ### We need to coordinate several people, rooms or pieces of equipment. Can Calendar show them together? Yes. Each calendar can represent a user or resource, and several calendars can appear in one view with configurable colours, order and visibility. Available entities depend on configuration and roles. ### How does it prevent appointments outside working hours or overlaps? It uses working hours, bookable slots, availability checks and overlap warnings. Free, snap, confirm or strict modes determine how closely a selection must follow the configured slots. ### What happens when only one appointment in a recurring series changes? You can choose the scope: one occurrence, this and following occurrences, or the whole series where the operation supports it. Previews, exceptions and series splitting preserve the relationship with the original recurrence. ### Can we send automatic reminders to participants? Yes, by email, WhatsApp or SMS when the relevant channel is enabled. Recipients, template and delivery time are configurable; delivery still depends on the external service used and is not guaranteed by this page. ### Can we reconstruct who changed an appointment? The audit history can show recorded operations and field-level differences, including relevant changes to recurring series. Visibility depends on retained data and assigned permissions. ### Can Calendar retain the business context of an appointment? Yes. An event can link customer records, participants, resources and products so authorised users find the context beside the schedule. Available relationships and services depend on configuration, licensing and roles.