Ritam@yuriha I am not entirely sure what Adventar does, but if it helps, I am always impressed by your implementation of the "catch up" feature. I don't know how the backend is, but the the UX is pretty great and intuitive.
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.