When comparing Tumblr vs Google Sheets, the Slant community recommends Tumblr for most people. In the question“What are the best Material Design apps?” Tumblr is ranked 18th while Google Sheets is ranked 57th. The most important reason people chose Tumblr is:
It costs nothing to create a Tumblr account.
Question Ranking
Pros
Pro Free
It costs nothing to create a Tumblr account.
Pro Community-driven
It is built around sharing and discovering new, short-form content.
Pro Good customization options
Tumblr allow users to customize their website with many built-in themes. In addition to theme selection, user can also further customize their website either through a customization editor wizard or through a HTML and CSS editor for advanced users.
Pro Supports responsive design & mobile-friendly websites
Tumblr supports responsive design for the website as it will be fitted with the same theme based on which device the user is using to view the website. It can also vary by theme with responsive design availability.
Pro Great mobile apps
Easy to use Windows Phone, iOS and Android are available.
Pro Custom domain support
If you want to use your own domain instead of *.tumblr.com, you can.
Pro Scalable, customized organization
Infinite row/columns and all the separate tabs to play with. Trips can be organized with as many attributes and calculations as you see fit.
Pro Good for budgeting
Since it is a spreadsheet, very easy to calculate budget, and any secondary calculations as well (e.g. cost/day, cost/location, etc.)
Pro Easy to share
Google Sheets are always accessible on the cloud, and easy to control permissions to share with relevant parties.
Pro Easy to export
Physically (printing) and otherwise (converting to excel, attaching to emails).
Pro Cross-platform
Can be accessed from any device via the browser, or Google's iOS and Android apps.
Cons
Con Not optimized for travel
Unlike travel-specific websites, Sheets won't be able to tell if one link is a flight, and another is a hotel reservation, nor will it be able to know which cells correspond to what leg of the trip.
Con Zero foundation
While there are sample layouts (see Travel planner), it's likely that each person's trip planning needs will be unique enough that it's better to start from scratch. Of course, once you use Sheets for one trip, it'll be easier and faster to set it up for future trips.