AllApps

The best calendar apps.

Cozi Family Organizer is the top pick, built for a parent juggling school pickups, appointments, and shared to-do lists with a spouse across separate phones. Apple's own Calendar app works for a solo iPhone user who wants something simple, but recent reviews flag alerts silently failing and events dropping out of sync, which matters for anything time-sensitive. Structured suits someone who wants a visual daily timeline on iPhone and Apple Watch and doesn't mind paying for recurring reminders.

The filter. Every app here is rated 4.2 or better, has been updated in the last eighteen months, and has no significant number of reviewers reporting it broken. Price is not the rule on this list — some are free, some are not.
Top pick

Calendar

Apple
View on the App Store ›
Free4.9★ (1,514,783)Updated Dec 12, 2025unverified
Verdict
The built-in Calendar is a solid default, but recent reviews show recurring complaints about alerts not firing and events not syncing across devices, which is a serious problem for a scheduling app.
Best for
An iPhone user who lives entirely in Apple's ecosystem and mainly needs a simple, no-frills calendar without cross-platform sync demands.
The catch
Multiple reviewers report notifications and reminders silently failing to trigger, and events not syncing correctly across devices, sometimes with lost events.
Native app

Cozi Family Organizer

Cozi
View on the App Store ›
Free4.8★ (398,538)Updated Aug 31, 2026unverified
Verdict
Cozi is a shared family calendar built around syncing schedules and reminders across multiple people's devices, which is what its reviewers actually praise. Some features, including importing an existing calendar, sit behind a paid tier, and a handful of users report freezing and list-sync glitches.
Best for
A parent coordinating school pickups, appointments, and shared to-do lists with a spouse across separate phones.
The catch
The free version carries ads and the paid Gold tier still won't let you import an existing calendar; a few users also report the app freezing or losing checklist items during use.
Native app

Dayforce

Dayforce Corporation
View on the App Store ›
Free4.7★ (509,656)Updated Sep 14, 2026unverified
Verdict
Dayforce is a workplace HR/payroll app for clocking in, checking pay stubs, and viewing schedules, not a personal calendar app. Reviewers report crashes during punch-in, slow loading, and sync mismatches with the desktop version.
Best for
An employee whose company already uses Dayforce for timekeeping and payroll who needs to punch in, check pay stubs, or view a work schedule from a phone.
The catch
This isn't a general calendar app: reviewers describe crashes and freezing specifically during time clock punch-in, slow loading causing punch errors, and schedule/calendar data not syncing reliably with the desktop version.
Native app

Square Appointments: Scheduler

Block, Inc.
View on the App Store ›
Free4.9★ (195,300)Updated Sep 11, 2026unverified
Verdict
Square Appointments is built for booking and payments together, not just calendar viewing—reviewers praise the client-facing scheduling and automated reminders, but there's a real pattern of crashes, freezes during payment, and dark mode bugs.
Best for
A solo service provider, like a one-person barber or salon operator, who needs clients to self-book and pay in the same app and doesn't mind occasional glitches during a transaction.
The catch
Multiple reviewers report the app freezing specifically when taking client payment, plus dark mode rendering it nearly unusable and updates that have broken existing workflows.
Native app

Structured: Daily Planner Todo

unorderly GmbH
View on the App Store ›
Free4.8★ (165,782)Updated Sep 11, 2026unverified
Verdict
Structured is a visual daily planner with well-liked notifications and sync, but core features like recurring tasks and custom notification sounds sit behind a subscription paywall that some reviewers feel blindsided by.
Best for
Someone who wants a drag-and-drop visual timeline for their day and syncs across an iPhone and Apple Watch, and who's fine paying for recurring task reminders.
The catch
Recurring tasks, repeat scheduling, and even notification sound customization are locked behind a subscription; several reviewers say the free version becomes largely unusable once they hit that wall.
Native app

Who should skip this entirely.

If you need to clock in, check pay stubs, or view a work schedule set by your employer, skip this list entirely — Dayforce is HR/payroll software, not a personal calendar, and none of these apps replace it. Likewise, if you're a service provider who needs clients to book and pay you directly, get Square Appointments for that specific job rather than treating it as your everyday calendar. And if reliable alerts matter more than anything else, don't default to Apple's Calendar just because it's preinstalled — its sync and notification complaints are a real risk for anyone tracking deadlines or appointments.

Questions.

What's the best calendar app for coordinating a family's schedule?Cozi Family Organizer is built specifically for this — multiple people syncing shared events, reminders, and to-do lists across separate devices. It does carry ads on the free tier and a few users report occasional freezing, but the core shared-scheduling feature is what reviewers actually praise.
Is the built-in Apple Calendar good enough?It's fine for a single-device, no-frills user who doesn't need cross-platform sync. But recent reviews describe alerts not firing and events failing to sync across devices, sometimes losing events entirely, which is risky if you rely on it for anything important.
Can I use a calendar app to clock in for work?Not from this list, except Dayforce, and that's a workplace HR/payroll tool rather than a general calendar. It has its own problems too, including crashes during punch-in and syncing mismatches with the desktop version.
Which app is best if I want a visual daily planner?Structured offers a drag-and-drop visual timeline that syncs with Apple Watch and has well-liked notifications. Just know that recurring tasks and custom notification sounds sit behind a paywall, and the free version gets limited fast.