Lottie changed how animation gets into websites and apps. Vector animation, rendered natively, at a fraction of the file size of video — which means teams can use motion in places where video was never an option.
Here are three products that built it in, and what each one got out of it.
Razorpay
For Razorpay, the biggest gain was handoff. Lottie removed most of the friction between designers producing animation and engineers implementing it — the designer exports a JSON file, the developer drops it in.
The animations do real product work. They highlight parts of the flow, teach users about the product as they move through it, and confirm when a task completes. That last one matters more than it sounds: motion at the end of a payment is feedback, and feedback is what makes an interface feel trustworthy.
The other benefit was size. Lottie’s small file sizes kept the app build lean, and the format’s simplicity shortened delivery timelines.
Duolingo
Duolingo wanted learning that felt engaging rather than administrative. Lottie’s animation is a large part of how that was achieved — and users demonstrably spend more time in the app because of it.
Scale is the interesting part here. Lottie made it practical to integrate thousands of animation files into a single product. Tooling like Lottie Editor and Lottie Preview let the team test on iOS and Android before shipping, so experimenting and troubleshooting happened during development rather than after release.
Duolingo runs across a wide range of devices and operating systems, and small file sizes are what keep performance consistent on all of them — including older hardware, which for a global education product is most of the install base.
Setel
Setel’s distinctive illustration style, paired with restrained animation, gives the app a strong identity for comparatively little branding effort.
Lottie handles the cross-platform problem cleanly. The same animation runs across devices and operating systems without per-platform adjustment, which removes an entire category of maintenance work.
Small file sizes keep the app responsive, and the motion makes communication with users more engaging — a product that would otherwise be purely functional feels considered instead.
What These Have in Common
Three different products, one pattern: Lottie let each team use animation where the weight of video would have ruled it out.
The specific gains repeat across all three — smaller builds, faster handoff between design and engineering, consistent behaviour across platforms, and users who spend longer in the product.
Conclusion
Motion makes an app feel alive, and Lottie is what makes motion affordable at the scale a real product needs.
The case studies above show it working in payments, education, and fuel retail — categories with nothing in common except the need for an interface people actually enjoy using.
We build Lottie animation for exactly these situations — products that need motion to feel finished, without the file size that makes motion impractical. See our interactive animation work, or tell us what you’re building.