Best Calendar Software UK 2026

For most UK freelancers and small teams, Google Calendar remains the best calendar software UK users can get for free, though Outlook, Apple Calendar, and a handful of paid alternatives are worth a look depending on your setup. If you’re already paying for Microsoft 365 or locked into Apple’s ecosystem, stick with what you have rather than adding another app, and if privacy is the priority, Proton Calendar is worth the switch.

Google Calendar

Google Calendar is free with any personal Google account, and it’s the calendar most of your clients and suppliers are already using. That matters more than any feature list: shared invites, meeting responses, and Google Meet links all just work without anyone needing to sign up for anything.

The free version covers everything a sole trader needs: multiple calendars, colour coding, event search, and reminders. Where it gets confusing is Google Workspace, Google’s paid business bundle. Business Starter costs from around £5.90 per user per month plus VAT on an annual commitment, but that price buys you a custom business email address and extra storage, not a better calendar. If you don’t need a @yourbusiness.co.uk email address, there’s no reason to pay for Google Calendar at all.

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Outlook Calendar

Outlook Calendar is free with any Outlook.com, Hotmail, or Live account, and it’s the natural pick if you already run your inbox through Outlook. The web and mobile versions cover the basics well: recurring events, categories, and easy rescheduling by drag and drop.

Where it earns its place over Google is if you’re already paying for Microsoft 365. A Microsoft 365 Personal subscription costs £84.99 a year, or £8.49 a month, and bundles the full desktop Outlook app, Word, Excel, and 1TB of OneDrive storage alongside the calendar. Microsoft 365 Family extends that to up to six people for £104.99 a year, which works out cheaper per head if you’re sharing the subscription with a partner or co-founder.

Buying Microsoft 365 purely for the calendar isn’t worth it. Buy it because you need Word and Excel, and treat the calendar as a bonus that happens to sync properly with everything else in the Microsoft ecosystem.

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Apple Calendar

Apple Calendar is free, pre-installed on every iPhone and Mac, and genuinely underrated. It syncs invisibly through iCloud, handles time zones without fuss, and its natural-language event entry (type “lunch with Dave Tuesday 1pm” and it just works) covers most of what people pay Fantastical for.

The catch is that it’s built for people who live entirely inside Apple’s ecosystem. If anyone on your team uses Windows or Android, Apple Calendar becomes a second calendar to check rather than the one place everything lives. For a sole trader who’s all-Apple, there’s honestly no reason to look further or pay for anything else.

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Notion Calendar

Notion Calendar is completely free and works as a standalone app, so you don’t need a paid Notion subscription to use it. It layers Google Calendar, Outlook, and iCloud accounts into one clean view, and its main trick is pulling due dates from Notion databases straight onto your calendar.

If your team already tracks jobs, projects, or deadlines in Notion, this closes a real gap: you stop needing to manually copy deadlines from a project board into a separate calendar. If you don’t use Notion for anything else, though, this is just a nicer-looking free calendar app with no meaningful advantage over Google Calendar. It’s worth reading our guide to project management software for UK small businesses if task and calendar overlap is the actual problem you’re trying to solve, since a dedicated tool may serve you better than a calendar with database syncing bolted on.

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Proton Calendar

Proton Calendar is built by the Swiss company behind Proton Mail, and every event you create is end-to-end encrypted, meaning Proton itself can’t read your calendar entries. The free plan gives you a small number of calendars, which is enough for most solo users.

Upgrading to Proton Unlimited costs £7.99 a month on annual billing, or £10.39 a month paid monthly, and bundles Proton Calendar with encrypted email, cloud storage, a VPN, and a password manager. That’s a genuinely useful bundle if you’re already thinking about data privacy for client information, but it’s an expensive way to buy just a calendar. This is the pick for tradespeople and consultants who handle sensitive client data and want that protected by design rather than by promise.

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Fantastical

Fantastical is a premium calendar app for Mac, iPhone, iPad, and Apple Watch, built around fast natural-language event entry and a genuinely pleasant interface. A free tier exists and covers basic calendar viewing, but most of what makes Fantastical worth talking about, calendar sets, travel time alerts, and meeting scheduling links, sits behind Flexibits Premium.

Individual Premium is priced in US dollars by Flexibits, starting from $6.99 a month, or roughly $56.99 a year if you pay annually, and UK buyers pay the converted equivalent at checkout rather than a fixed GBP price. Windows support exists but some features, including travel time and time-to-leave alerts, are still marked as coming soon on that platform. If you’re not on Apple hardware, this isn’t the pick for you.

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Morgen

Morgen is the odd one out here: it’s not really a calendar app, it’s an AI time-blocking layer that sits on top of your existing calendars. Connect Google, Outlook, iCloud, or Fastmail, plus task tools like Todoist or ClickUp, and Morgen’s AI Planner suggests where to slot tasks into your actual free time, which you approve before anything gets scheduled.

There’s no free tier. Pricing, confirmed directly from Morgen’s own site, is $30 a month billed monthly or $15 a month billed yearly at $180 for the year, with a 14-day free trial and no card required upfront. Like Fantastical, Morgen bills in US dollars with no separate GBP price. This only makes sense if you’re genuinely drowning in multiple calendars and a separate task manager. If you check one calendar and get on with your day, you’re paying for a problem you don’t have.

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Free defaults vs paid calendar apps

For most UK sole traders and small teams, the free default that matches your email provider is the right call. Google Calendar if you use Gmail, Outlook if you use Microsoft 365, Apple Calendar if you’re all-Apple. Switching costs you the habit of everyone already knowing how to invite you to something, and none of the paid options here fix a problem the free defaults actually have.

Paying makes sense in two specific cases. Pay for Fantastical if you’re on Apple hardware and want faster, nicer event entry than the built-in app offers. Pay for Morgen if you’re managing several calendars and a separate task list and the mental overhead of switching between them is genuinely costing you time, not just mildly annoying you.

None of the tools above are built for clients booking time with you directly, that’s a different job. If you need people to self-book appointments or consultations, see our guide to scheduling software for UK small businesses instead. Calendly does that specific job well and can sit alongside whichever calendar app you pick from this list, syncing into it rather than replacing it.

Frequently asked questions

Whichever calendar you pick, the one that matches what your clients and contacts already use will save you more friction than any feature list.