You don't have to use Mastodon through an app!
Every server has its own website where you can log in and use all its features. The web interface is excellent, and it usually gets the latest features before the apps do.
Your server's website address will usually be the same as its name, for example the website for the server kind.social is at https://kind.social
The website works on both computers and phones. (If you're using the phone version, click # to see the search box.)
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.