Ryan Handrahan
Seamless Carousel Maker app icon

Seamless Carousel Maker

Turn one wide photo into a seamless Instagram carousel.

Download on the App Store  iPhone · $2.99 once · No subscription

Before: one wide photo

The Manhattan skyline at dusk from a rooftop, from One World Trade Center on the left to the Empire State Building on the right.

After: three slides, no seams

Slide 1: One World Trade Center against the sunset. Slide 2: the middle of the skyline as the sunset fades. Slide 3: Midtown and the Empire State Building.

Why I built it

Seamless carousels look great, but every simple way to make one wanted a subscription for something I'd use a few times a year. It was also my excuse to learn vibe coding, back in April 2026 when building an app that way still felt brand new.

Who it's for

Creators and small brands who post carousels, especially anyone with a panorama or wide landscape shot. It's photo-first, with no text tools, on purpose.

The promise

The seams disappear.

It does one job, so there are no accounts, no watermarks, no subscription, and your photos never leave your phone.

What I built

Auto slide count

Pick 4:5 or 1:1, add a photo, and it works out how many slides you need, from 2 to 20.

Swipe preview

See exactly what your followers will see before you post.

Export outline and seam lines

An amber outline shows what exports. Red lines show where each slide splits.

Numbered export

Slides save to your camera roll in order, ready to post.

How I launched it

I wrote the App Store listing and built a small social kit: a feed carousel, a statement post and a set of Stories. Before going public, friends and family tested it on TestFlight.

Statement post: Most seamless carousels are made the hard way. Carousel Maker skips the crop tools. How it works: pick a shape, add one wide photo, preview the swipe, export and post. Story: No watermarks. No subscription. One-time purchase.

What I learned

The best fixes came from using it on my own photos. A picture of my dog showed me the preview box wasn't the real export edge, so I added the amber outline. It does its one job now, so I'm letting real use decide what comes next while I focus on Doors @.