Over 5,000 active users and a steadily growing base of subscribers.

Given a film, a list, a review or a profile, the app turns it into an Instagram story. Published in 2021, still running.

Project

Name

Stories for Letterboxd

Deliverable

iOS and Android

Year

2021

At a glance

Role

Our own product

Active users

5,000+

App Store

Google Play

Access

Asking for access that doesn’t normally get granted

Letterboxd keeps its API closed. We wrote to them asking for brand permission and for access, and they gave us both. Everything the app does depends on that conversation going the way it did.

Decision

Publishing, not exporting

Most apps of this kind generate an image and leave you to save it, open Instagram and post it yourself. We integrated the Instagram API instead, which meant stories could be built in layers and sent directly. The difference is small to describe and large to use.

The hard part

The review story

Reviews vary wildly in length. A two-line reaction and a six-paragraph essay both have to become something readable inside a nine-by-sixteen frame.

Rather than force one layout to handle both, we designed a set of them. At least one holds a full review of any length by shrinking the type as far as it will go. The others set a limit and truncate past it, trading completeness for a type size people will actually read. The user picks which trade they want.

Iteration

An editor shaped by the people using it

The in-app editor started deliberately limited. What it has now came from requests: more typefaces, different text alignments, adjustments users asked for directly and got.

The app launched on iOS only. Android came later for the same reason.

Let’s create

great things.

How do you work?

We keep things transparent and collaborative. We share updates consistently throughout the process, so nothing comes as a surprise. Weekly 1-to-1 meetings keep the work aligned and give space to review what's been done and plan what's next.

Why should I choose Heterochromia?

We work fast and we have an opinion. We don't just ask "what do you want?" and execute. We guide you through the process, challenge your assumptions when needed, and help you get to something better than what you imagined. Damn, we love what we do.

Do you do outsourcing?

Over the years, we have met a lot of talented people. Some of them work with us regularly on projects that require specific expertise.

What timezone are you in?

We are based in Milan, Italy (CET/CEST), but we work with clients in the USA and Japan with full flexibility.

Milan, Italy

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You can also mail us at:

© 2026 Heterochromia.

All rights reserved.

Milan, Italy

--:--

You can also mail us at:

© 2026 Heterochromia.

All rights reserved.

.