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Google Calendar

The shareable online calendar by Google

★★★★★ 5.0/5
FactScore™ 61.5
VS

Shrewd Observer

Android app for discipline and quality life moments

FactScore™ 0

Updated February 2026

Google Calendar Shrewd Observer
Rating 5.0★ N/A
Reviews 16 0
Pros 14 0
FactScore™ 61.5 0

FactScore™ Comparison

FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.

👑
61.5
Google Calendar FactScore™
★ Google Calendar wins on FactScore™
—
Shrewd Observer FactScore™

Pros & Cons

Only in Google Calendar — Pros

Seamless integration User-friendly interface Reminders Sync across devices Calendar sharing Color-coded calendars Easy scheduling Reliable performance Simple design Clean interface Customization options Dark mode Good API documentation Google Calendar API

Both tools — Pros

—

Only in Shrewd Observer — Pros

No unique pros listed

Only in Google Calendar — Cons

Dependency on digital tools Limited task color options

Both tools — Cons

—

Only in Shrewd Observer — Cons

—

Details

Google Calendar Shrewd Observer
Categories Team collaboration software, Calendar apps, Scheduling software Scheduling software, Time tracking apps, Activity tracking
Platforms Web Web · Android
Became Popular October 17, 2017 April 6, 2024
Website calendar.google.com play.google.com

Who Should Pick Which?

Choose Google Calendar if...

  • Seamless integration
  • User-friendly interface
  • Reminders

Choose Shrewd Observer if...

  • No unique pros listed

With a FactScore™ of 61.5 vs 0, Google Calendar leads in community reception. Google Calendar uniquely offers Seamless integration and User-friendly interface, while Shrewd Observer stands out for No unique pros listed.

3

What Users Say

Google Calendar

A
Akshay May 5, 2025
★★★★★

We all use it, so it only makes sense to integrate it into our app. Syncing with Google Calendar makes scheduling super easy. Our AI agents use Google Calendar to check availability and book meetin...

E
Eric Mar 10, 2025
★★★★★

Building add-ons for Google Calendar was a great experience thanks to all their documentation and fast approval process!

K
KP Mar 22, 2025
★★★★★

Every coaching call, event, and session booked through Flexpoint syncs effortlessly with Google Calendar. It’s intuitive for both creators and customers, keeps everything organized, and just works....

Shrewd Observer

No reviews yet

Frequently Asked Questions

Which is better, Google Calendar or Shrewd Observer?

Based on FactScore™, Google Calendar leads with a score of 61.5 vs 0. Google Calendar has a higher rating of 5.0★ compared to N/A★.

What are the pros of Google Calendar compared to Shrewd Observer?

Google Calendar uniquely offers: Seamless integration, User-friendly interface, Reminders, Sync across devices, Calendar sharing.

What are the pros of Shrewd Observer compared to Google Calendar?

Shrewd Observer uniquely offers: No unique pros listed.

Is Google Calendar better rated than Shrewd Observer?

Google Calendar is rated 5.0★ from 16 reviews. Shrewd Observer is rated N/A★ from 0 reviews.

What is the FactScore™ of Google Calendar and Shrewd Observer?

FactScore™ weighs rating and review volume together. Google Calendar scores 61.5 and Shrewd Observer scores 0.

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