Tina Marie Survilla Lindell and Cesar Alejandro Kuriyama’s relationship began with what Ms. Survilla Lindell calls a “tweet cute.”

In March 2020, Caveat, a Speakeasy-style bar and event space on Manhattan’s Lower East Side, announced that it was closing temporarily because of the pandemic. Ms. Survilla Lindell, a regular patron, tweeted out a message of support. It was seen and liked by Mr. Kuriyama, who also frequented Caveat.

The two soon began to follow each other on Twitter, now known as X. Mr. Kuriyama wanted to learn more about bird watching, a pastime and popular tweeting subject of Ms. Survilla Lindell’s. And she was pleasantly surprised to discover that Mr. Kuriyama was the creator of 1 Second Everyday, an app that records one second of video every day and chronologically edits them together. She’d been using it for the past year to chronicle her life in New York City.

“It was one of my favorite apps,” Ms. Survilla Lindell, 35, said. “I like to believe that he was making my life better even before we met.”

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Many months later, they each learned that the other was single. They began corresponding via direct messages more regularly, often chatting late into the night and sharing details about their lives. Mr. Kuriyama, who has a bachelor’s degree in computer graphics from Pratt Institute, shared his obsession with the concept of time, which, fittingly, inspired his app.

Ms. Survilla Lindell discussed her love of science fiction and space. And she shared another tidbit: that she had never eaten a Burger King Whopper. Mr. Kuriyama suggested that she try one and offered to be there when she did so he could record it as that day’s “one second” of footage.