See it all at a glance.

FirstSeed Calendar was designed to make the most of today's big-screen iPhones. The month view, the one you reach for most, offers one-handed operation for the everyday actions: viewing, adding, editing, deleting, moving and duplicating events.

FirstSeed Calendar also offers three kinds of month view. The default scrolls horizontally, while the vertical month view scrolls smoothly across month boundaries so you can get to another day even faster.

FirstSeed Calendar syncs with Apple's Calendar app, so you can use iCloud, Google Calendar or any other online calendar to keep your events in sync across all of your devices.

FirstSeed Calendar always embraces the latest features of iOS. With iOS 26 it was quick to adopt Liquid Glass, Lock Screen widgets, weather and Focus filters. On iPhone you can place widgets directly on the Lock Screen, making it easier than ever to check your schedule. You can also add a quick-create button to the Lock Screen, so a new event takes just a tap.

Focus filters are supported as well — you can show only your work calendars while your Work Focus is on, for example. And with weather integration, the forecast for your current location or a chosen city appears right inside your calendar.

In most calendar apps the week view needs vertical scrolling. FirstSeed Calendar shows the hours that matter most in a grid and lists the rest of the day's events below, so there is no vertical scrolling at all.

This new approach is used in the day view as well, letting you focus on your office hours or whatever time is important to you.

FirstSeed Calendar supports reminders too, so you can manage your to-dos exactly the way you manage your events. Reminders sync between iPhone, iPad and Mac via iCloud.

The newer reminders introduced in iOS 13 and macOS Catalina are only partially supported. Sub-reminders, for example, appear as reminders without a due date. Full support will arrive in a future update.

FirstSeed Calendar lets you create an event or a reminder almost as if you were talking to it. Type "Dinner at 7 pm tonight" or "Remind me to call John at noon" and the entry is created for you. Better yet, use Siri's voice dictation and simply say it out loud.

Natural language input works when your iPhone's language is set to English, German, French, Spanish or Japanese. More languages will be supported in future versions.

FirstSeed Calendar supports external keyboards. Connect a Smart Keyboard, an Apple Magic Keyboard or any other keyboard and you can use a wide range of shortcuts. Press and hold the Command (⌘) key to see the full list.

FirstSeed Calendar for Mac is built to take full advantage of the Mac. It is optimized for the latest models and runs smoothly.

It can also live in the menu bar and launch automatically when you log in. The menu bar app runs independently of the main app, so you can use it on its own if you prefer. Full-screen mode, drag and drop, Notification Center, dark mode and Liquid Glass in macOS 26 are all supported — this is a Mac app built the way a Mac app should be.