Simon Grimm

Simon Grimm

@galaxies.dev

Helping devs master React Native 🚀 | Founder Galaxies.dev 💫 | Sharing tips, tools, and tutorials to level up your mobile app game 📲 | YT https://www.youtube.com/@galaxies_dev 🔥

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Simon Grimm
@galaxies.dev

🚀 Just launched: React Native Zero to Hero! This is your single-track to launch your first React Native app in 2025 and get XP with epic libraries like: 🔗 @expo.dev Router 📦 Data Storage 🔐 Authentication ✨ TanStack Query 😎 Zustand 💰 In App Purchases with RevenueCat galaxies.dev/missions/ze...

galaxies.devZero to Hero - Mission: Launch Your First App Galaxies.dev | React Native Tutorials for Mobile App DevelopmentHi! I'm Simon. 👋 Get courses, projects, hands-on help, and more as you learn to publish iOS & Android apps.
Simon Grimm
@galaxies.dev

If you have a server with CRON jobs do yourself a favor: Add them to a Sentry monitor ✌️ I don't want to learn about failures from my users.

Simon Grimm
@galaxies.dev

I’ve tried a lot of React Native tools over the years. Most are fun for a week. A few made it into my daily workflow. I made a video about the ones I actually use to save time when building apps 👇

Simon Grimm
@galaxies.dev

Testing a game is fun 🙃 You need to cover different platforms, different player levels, different devices... Think I need to figure out how AI can do all of that - any idea where to start the automation?

Simon Grimm
@galaxies.dev

I don’t think Tiny Harvest needs another feature right now. It needs more people to find it. That’s a much harder problem to solve.

Simon Grimm
@galaxies.dev

Long run this morning. One nice thing about marathon training: Even if work feels chaotic, you get one clear win for the day.

Simon Grimm
@galaxies.dev

If you want to lose weight, doing more sports is rarely the answer. It's 95% about what you eat. When I actively train, I am so much more hungry all the time that I have a hard time staying in a deficit at all.

Simon Grimm
@galaxies.dev

Sport is important when losing weight, but more in a sense that you maintain muscle. If you want to have an easier time, just get to 10-20k steps daily (walking pad!) and eat healthy.

Simon Grimm
@galaxies.dev

With all the evidence it's just sad to see so many people saying "I need to start running again to lose weight" while actually the opposite of it is true. Don't make it harder for yourself then it has to be!

Simon Grimm
@galaxies.dev

Running a Product Page Optimization test for the first time ✌️ My games CR isn't great, and instead of randomly trying things, I made a test in ASC: - Original page - Simply a new preview video - New screenshots Traffic split equally between the 3, let's see if there are any meaningful trends!

Simon Grimm
@galaxies.dev

I have to set up a new Google dev account and transfer my game 🙈 Wish me luck in the migration. Will share how I did it and whether it worked!

Simon Grimm
@galaxies.dev

Not the most popular keywords, but trying to grow on some new ones like "acres" and ranking better on "stardew valley" ❗️Note: Don't directly use a competitor keyword or you get in trouble

Simon Grimm
@galaxies.dev

Current priorities: ✅ August season ✅ Bugs & QoL ✅ TikTok ✅ Reddit ✅ X Trying really hard not to hide behind “just one more feature.”

Simon Grimm
@galaxies.dev

My game finally hit $5,000/month. For a few weeks, I thought: “Nice, this is my new normal.” Then installs dropped again. Why? 👇

Simon Grimm
@galaxies.dev

The next few months I’ll probably spend just as much (or more) time on marketing as I do writing code. Weird shift, but it feels like the right one.

Simon Grimm
@galaxies.dev

June 2026 income report for my mobile game Tiny Harvest 🌽 💰 $5,831 revenue 👥 6,145 new players Still blows my mind that this little farming game is becoming a real business.

Simon Grimm
@galaxies.dev

Definitely seeing a relation between Apple giving Tiny Harvest traffic and in-app purchases. Distribution really is everything.

Simon Grimm
@galaxies.dev

I built an AI voice notes app with React Native. And AI agents wrote most of the code. Call me a vibe coder, but this is how you build great apps in the age of AI 👇

Simon Grimm
@galaxies.dev

Next week I’m joining @sentry.io to share how I monitor and debug production issues in Tiny Harvest 🎮 We’ll look at real crashes, debugging workflows, and what changes when you have actual users. Join us 👇 sentry.io/resources/r...

sentry.ioFixing React Native Apps: Don't Let Bugs Crop UpJoin this hands-on workshop to learn how to find and fix bugs in React Native apps using Sentry. From crash reporting to performance monitoring, get the tools to ship with confidence.
Simon Grimm
@galaxies.dev

My latest video about AI thoughts seems to resonate with many of you. It’s about what AI has changed for me, why I’ve been building indie apps instead of courses lately, and why my YT channel is changing. Maybe we’re all figuring this out together.

Simon Grimm
@galaxies.dev

Are you building apps with React Native? You should probably target TV devices - it's one of the best choices you can make 👇

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Simon Grimm
@galaxies.dev

Are you building apps with React Native? You should probably target TV devices - it's one of the best choices you can make 👇

Simon Grimm
@galaxies.dev

In this video I'll walk your through the process of transforming a React Native app with @Expo to a monorepo with Vega OS TV App. You’ll learn: • How to install Amazons MCP and AI Builder Tools • How to refactor your app with AI • How to build a TV native app www.youtube.com/watch?v=j4V...

Simon Grimm
@galaxies.dev

"Pay 2 win." Every player hates these games. Every indie dev fears these comments. And yet here I am, telling you that it’s probably the best way to monetize and actually make money with your app. Here’s why I still use in-app purchases in my game 👇

Simon Grimm
@galaxies.dev

How hard is it to run a mobile game alone? Harder than building the game itself. Because building is just one part of it 👇

Simon Grimm
@galaxies.dev

I built a mobile game completely by myself - no team, no studio, just me. In this video I'm breaking down the full experience: - what went right - what went horribly wrong - what I'd do differently ...and whether it was actually worth it 🤷‍♂️ www.youtube.com/watch?v=wGi...