Comparison

HEY Calendar vs CallGrid

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

HEY Calendar

This calendar app organizes your schedule around days and weeks, reflecting how people naturally think. It supports habits, highlights important events, and accommodates flexible scheduling for tasks that don't have a fixed time. Enjoy a full-featured experience with unique twists on conventional calendar functions.

Highlights
  • Weekly view focus
  • Habit tracking
  • Event highlighting
  • Flexible scheduling for 'maybe' tasks
  • Event countdowns
  • Day labels for context
  • Color-coded sub-calendars
  • Flexible reminders
Read full description

Make your day. The all-new HEY Calendar puts time on your side. Week after week, not month after month People think in days and weeks, not months. What’s tomorrow? Later this week? Next week? The HEY Calendar is built around how you think, not how paper calendars were designed. Habits and highlights Establish a habit, stick with it. Circle important events so they stand out. Fill your days with memories or moments — not just events. “Sometime this week” mimics real life Need to get an oil change? Get some cash from the ATM? Write a thank you note? Maybe this week or next, just not exactly sure when you’ll have a chance? HEY knows “maybe” is a real thing. And plenty more The HEY Calendar is a full-featured calendar with many original twists on common — and not so common — conventions. Soon you’ll wonder why all calendars don’t work like this. - Set countdowns for anticipated events - Use Day Labels to add context to days - Set up color-coded sub-calendars - Flexible reminders so you don’t miss out

About

CallGrid

Features
Read full description

CallGrid is the companion app for medical residents using the CallGrid scheduling platform. Stay on top of your call schedule, coordinate swaps with co-residents, and manage time-off requests — all from your phone. Your Schedule, At a Glance See your upcoming call assignments and service rotations in one place. Your next call is always front and center, with service blocks showing your current and upcoming rotations along with your team members. Who's On Call? Quickly check which residents are on call for any date. Swipe through the week or jump to a specific day — no more texting around to find coverage. Swap Requests Made Simple Need to trade a call day? Pick your slot, choose a co-resident (or post an open swap for anyone to claim), and optionally target a specific day. Add a note and submit — your co-resident and chief are notified instantly. Time-Off Requests Request vacation, no-call days, or other time off directly from the app. See your remaining balance, pick dates on the calendar, and check for schedule conflicts before submitting. Share Your Schedule Generate a secure, expiring link to share your schedule with family, significant others, or anyone who needs to know when you're on call. Stay in the Loop Get notified when schedules are published, swap requests come in, or your time-off is approved. Never be caught off guard by a schedule change. Features: • View call and shift schedules with service rotations • See who's on call for any date • Create and manage swap requests • Request time off with real-time balance tracking • Share your schedule via secure links • Dark and light theme support • Sign in with Apple, Google, or email CallGrid requires an active account on a CallGrid-powered residency program. Contact your program administrator to get started.

Screenshots

HEY Calendar4 screens
CallGrid4 screens

Verdict

The call

The clearest difference is iOS requirement: CallGrid at 15.1 against HEY Calendar's 17.2. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

HEY Calendar ships an update fortnightly, CallGrid every 4 weeks. The most recent releases landed on October 22, 2026 and October 9, 2026 respectively.

Scorecard1 real difference · 9 level
HEY Calendar versus CallGrid: the parameters behind the verdict, then further details
ParameterHEY CalendarCallGrid
PriceFreeFree
Rating4.7 (658 ratings) — better—
Positive reviews56.4% of reviews—
Number of ratings658 — better—
Update frequencyFortnightly — betterEvery 4 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.215.1 — better
Further details — not scored
Size64 MB32 MB
Age rating4+4+
Developer37Signals LLCStephen Gregg

Bugs and requests

HEY Calendar

Reported bugs

4 issues
  • Events not showing up on calendar
  • Notifications not working as expected
  • Frequent crashes and performance issues
  • Inability to edit events from external calendars

Requested features

5 requests
  • Two-way sync with other calendar services
  • Ability to set custom recurrence patterns
  • Integration with mapping/navigation apps
  • Family/shared calendar support
  • Calendar widget for quick access

CallGrid

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

HEY Calendar

No in-app purchases

None

CallGrid

No in-app purchases

Questions

Is HEY Calendar free?
HEY Calendar is free to download, with no in-app purchases.
Is CallGrid free?
CallGrid is free to download, with no in-app purchases.
Do HEY Calendar or CallGrid have ads?
Neither HEY Calendar nor CallGrid shows ads.
Which is updated more often, HEY Calendar or CallGrid?
HEY Calendar ships an update fortnightly, and CallGrid every 4 weeks. Most recently, HEY Calendar was updated on October 22, 2026 and CallGrid on October 9, 2026.

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