GMass
Get the highest open rates you've ever seen.
Google Calendar
The shareable online calendar by Google
Updated February 2026
| GMass | Google Calendar | |
|---|---|---|
| Rating | 4.6★ | 5.0★ |
| Reviews | 5 | 16 |
| Pros | 0 | 14 |
| FactScore™ | 35.8 | 61.5 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
Only in GMass — Pros
No unique pros listedBoth tools — Pros
—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 APIOnly in GMass — Cons
—Both tools — Cons
—Only in Google Calendar — Cons
Dependency on digital tools Limited task color optionsDetails
| GMass | Google Calendar | |
|---|---|---|
| Categories | Scheduling software, Email marketing, Marketing automation platforms | Team collaboration software, Calendar apps, Scheduling software |
| Platforms | Web | Web |
| Became Popular | August 28, 2015 | October 17, 2017 |
| Website | www.gmass.co | calendar.google.com |
Who Should Pick Which?
Choose GMass if...
- No unique pros listed
Choose Google Calendar if...
- Seamless integration
- User-friendly interface
- Reminders
With a FactScore™ of 35.8 vs 61.5, Google Calendar leads in community reception. GMass uniquely offers No unique pros listed, while Google Calendar stands out for Seamless integration and User-friendly interface.
What Users Say
GMass
GMass is really effective for email outreach since it allows users to quickly and easily scale their link-building campaigns. This tool is easy to use and it runs seamlessly within the familiar Gma...
I recently discovered Gmass while searching for a mass mail sender that would seamlessly integrate with my existing database and be easy to use. Gmass has proven to be just that, offering a simple ...
I have been using G-Mass for years now, it has everything and is perfect for the email marketing and marketing campaigns. G-Mass is a robust and user-friendly email marketing tool that integrates s...
Google Calendar
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...
Building add-ons for Google Calendar was a great experience thanks to all their documentation and fast approval process!
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....
Related Comparisons
Frequently Asked Questions
Which is better, GMass or Google Calendar?
Based on FactScore™, Google Calendar leads with a score of 61.5 vs 35.8. Google Calendar has a higher rating of 5.0★ compared to 4.6★.
What are the pros of GMass compared to Google Calendar?
GMass uniquely offers: No unique pros listed.
What are the pros of Google Calendar compared to GMass?
Google Calendar uniquely offers: Seamless integration, User-friendly interface, Reminders, Sync across devices, Calendar sharing.
Is GMass better rated than Google Calendar?
GMass is rated 4.6★ from 5 reviews. Google Calendar is rated 5.0★ from 16 reviews.
What is the FactScore™ of GMass and Google Calendar?
FactScore™ weighs rating and review volume together. GMass scores 35.8 and Google Calendar scores 61.5.
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