Lennart Brandt

@brandtnewlabs.com

Design + Code in one 💻 🎨 🏳️‍🌈 Building brandtnew apps with React Native, Expo, and Supabase. Built & sold WeBurn 💪 Now working on @roamwise.app

Just realised the official react-native-purchases package by @revenuecat.com has only ~900⭐️… that’s 2,100 fewer than react-native-iap. Especially for @expo.dev apps, RevenueCat is the de facto standard for in-app purchases. Give it some love! ⭐️👇 github.com/RevenueCat/...

GitHub - RevenueCat/react-native-purchases: React Native in-app purchases and subscriptions made easy. Support for iOS and Android.

React Native in-app purchases and subscriptions made easy. Support for iOS and Android. - RevenueCat/react-native-purchases

github.com

Normally I’m all for keeping things simple — no unnecessary UI or animations. But I’m a big fan of the Joi app and just had to recreate how the buttons animate when the bottom sheet changes position. Fun fact: @roamwise.app’s design is heavily inspired by Joi and Flighty ✨

I’ve shared this animation before — but now it’s finally dialed in. ✨ Snappy pop-in scale on the buttons ⚡️ Fast spring for the progress bar 🌈 Interpolated colors on the progress dots Built using @expo.dev & @swmansion.com’s Reanimated. Code snippets + a gist for the progressDots below 👇

I’ve shared this animation before — but now it’s finally dialed in. ✨ Snappy pop-in scale on the buttons ⚡️ Fast spring for the progress bar 🌈 Interpolated colors on the progress dots Built using @expo.dev & @swmansion.com’s Reanimated. Code snippets + a gist for the progressDots below 👇

The one thing I’ve learned about App Store screenshots: They’re not just for looks—they’re your fastest pitch. With Roamwise, I made sure every screenshot instantly answers: “Why should I care?” Users don’t want features. They want instant clarity.

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1/ Using ChatGPT to optimise keywords for ASO? You’re leaving money on the table!!! 💸 It sounds smart. But in reality, ChatGPT completely ignores core ASO rules — and can seriously tank your keyword performance 🤡 A quick breakdown 🧵

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Skipped Figma 🚨 Went straight from wireframe to real UI — all in code with Expo & NativeWind Designing in code feels more honest. Faster feedback, fewer steps, and everything clicks better. @roamwise.app is built this way from day one.

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🌍 Traveling often? Counting days abroad for visa or tax rules stressed me out—especially with frequent visits to the UK. That's why I built @roamwise.app (a react-native expo app), a privacy-first travel compliance tracker for iOS. Here's the story 🧵

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Remember when WeBurn was headlining the App Store? Yeah, I built that — with React Native, from scratch, as a solo founder 🚀 Featured. Scaled. Sold. Time to do it again.

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In 2019, I got invited to Apple’s App Store Developer Session for Chew, my fasting app — and my fitness app WeBurn showed up in their “Apps We Love” slide. Both built with React Native. Still one of my favorite dev moments ✨

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