iiinova — where your digital self keeps evolving

Lennart Brandt @brandtnewlabs.com · 01/05/2025

Using it in two client projects and I'm loving it! Make sure to decide on how to work with the database. E.g. using legend-state together with supabase for offline-first support (and a great DX, as you don't have to keep local end remote state in sync)

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Lennart Brandt @brandtnewlabs.com · 25/04/2025

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.com

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

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Lennart Brandt @brandtnewlabs.com · 24/04/2025

I'm in love with @expo.dev, @swmansio.com's Reanimated, and gorhom's Bottom Sheet ❤️

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Lennart Brandt @brandtnewlabs.com · 23/04/2025

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 ✨

Lennart Brandt @brandtnewlabs.com · 22/04/2025

Here’s a look at my CardSheet in action: It uses expo-router’s transparent modal with animation: none — the animation is fully handled inside the sheet. Thinking about open-sourcing it… should I? 👀

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Lennart Brandt @brandtnewlabs.com · 22/04/2025

Spent one weekend building a custom animation system on top of @swmansion.com’s Reanimated and @expo.dev router. Every animation in my apps now feels on-brand — and I can animate anything in seconds.

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Lennart Brandt @brandtnewlabs.com · 21/04/2025

Recording your work to share it? Great way to catch bugs 🐛 Just spotted some unnecessary re-renders in the Roamwise calendar while filming a demo 😅 #reactnative #expo #indiedev

WuTangIsForTheChildren @wutangforchildren.bsky.social · 18/04/2025

Reposted by Lennart Brandt

London bus stop near Amazon HQ 🔥

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Or is the whole flatlist in a blurview and the blurintensity is animated based on some x scroll position of the currently visible item?

Looks amazing! Each item in the flatlist is a blurview with animated props (blur intensity) hooked up to the scroll position?

Reposted by Lennart Brandt

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 👇

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Ugh, that's annoying. Do you already have something new in sight?

Looking forward to meeting you, Jon 😊

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👋 Let's meet and have a coffee, tea or beer 😊

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Lennart Brandt @brandtnewlabs.com · 17/04/2025

I’ll be attending @appjs.co in May! 🥳 Excited to meet fellow React Native & Expo devs IRL, chat about apps, animations, and everything in-between. Who else is going? Let’s connect! 👋 #AppJSConf #ReactNative #Expo #IndieDev

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Did you know ~60% of users decide whether to subscribe during onboarding? 🚨 That’s exactly why I placed Roamwise’s paywall at the end of onboarding. It instantly reconstructs your travel history from your photo library. Feels like magic 🧙‍♂️ #indiedev #buildinpublic #reactnative

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I’m an EU citizen 🇪🇺, so I don’t deal with Schengen limits myself — but I’ve seen how confusing and stressful it is for non-EU travelers. So I set out to build the clearest, most intuitive solution out there. More visual. More useful. More… brandtnew. ✨

If users love it, I’ll expand it: ✅ Trip planner → Simulate future travel to see if you’ll stay compliant before booking. ✅ Even smarter alerts & edge-case handling (e.g. dual passports, visa overlap)

Why this feature? During #ASO research, I found that “Schengen” has surprisingly high search demand — and very few good apps solving the problem. So I built a feature that makes sense in one glance — no spreadsheet brain freeze required.

The interface is designed for clarity: 🟩 Status tile — tells you if you’re compliant, close to the limit, or over it 🗓️ Recommended action — based on your situation 📊 180-day timeline graph — shows days spent: In Schengen, Outside Schengen, No data 🔜 Upcoming day releases — when your days reset

That’s why I built SchengenPro inside Roamwise — a privacy-first travel compliance app. It gives you instant clarity on: ✅ How many Schengen days you’ve got left ✅ When you need to leave ✅ Which past dates count against your limit

Most travellers can spend 90 days within any 180-day period in the Schengen Area. But calculating that manually? An absolute nightmare💀 You either rely on spreadsheets… Or clunky tools that feel more complex than the rules themselves.

Lennart Brandt @brandtnewlabs.com · 15/04/2025

Schengen rules are confusing. Roamwise isn’t ✨ I just launched SchengenPro — a new feature that gives travellers a clear, visual overview of their 180-day Schengen timeline. Here’s what it does and why I built it 🧵 #indiedev #reactnative #expo

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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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Lennart Brandt @brandtnewlabs.com · 15/04/2025

I just fire console.logs 💀💀💀

Lennart Brandt @brandtnewlabs.com · 14/04/2025

Yes! Android is a real nightmare 😅 Which Android device(s) are you using for testing? I'm running a Nothing Phone 2A for Android development.

Lennart Brandt @brandtnewlabs.com · 14/04/2025

Learned the hard way: Always test on a real device as early as possible ‼️ Simulator felt smooth—but on my actual phone, haptics hit different, and Roamwise’s photo analysis slowed way down with my full media library. Nothing beats real-world testing #reactnative #buildinpublic

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Lennart Brandt @brandtnewlabs.com · 12/04/2025

Ah okay! 😅 And unfortunately AI is completely incompetent regarding all things react performance.

Lennart Brandt @brandtnewlabs.com · 12/04/2025

What was the issue with the performance? I just had struggles with huge amount of data in @roamwise.app too and managed to fix it through FlatList and proper separation of data loading into separate components.

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Lennart Brandt @brandtnewlabs.com · 12/04/2025

Turning 35 today! 🥳 Feeling great—healthier, happier, and more productive than ever. Freelancing with React Native @expo.dev wasn’t the plan, but it’s turned out to be a pretty good path to freedom.

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Lennart Brandt @brandtnewlabs.com · 11/04/2025

I didn’t think about groups at all 😅 But coming from react navigation, I found a flat stack without groups easier to maintain. And if I want to change how a specific screen is displayed, I can just change the options through constants and don’t have to update navigation routes throughout the app.

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Lennart Brandt @brandtnewlabs.com · 11/04/2025

Clean routes, easy modals, and zero headaches ✨ @expo.dev router is such a joy to work with.

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Lennart Brandt @brandtnewlabs.com · 11/04/2025

Exactly. The only downside I see is that I have to take screenshots for the App Store images which is a bit annoying 😅

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Lennart Brandt @brandtnewlabs.com · 10/04/2025

9/ Hope this saved you some time, headaches, and keyword potential. If you’re building apps solo and care about visibility, ASO isn’t optional. It’s leverage. Follow for more indie dev + app growth lessons. And maybe ❤️ + RT if this was helpful 🙏