I've been searching for a decent replacement and Retool seemed like a good option. I'm still messing around with it, but so far so good. They also have a free tier. More on reddit.com

What you mean by "Truly free"? At the end of the day, these are businesses: sure, they let you try their services, but they are not charitable organisations. In time, you too want to charge to use your app, so, think of the app that gives you the best results for your use case, not the "truly free". Spoiler: there's none. More on reddit.com

If it is for personal use, maybe bubble free app will suffice. If not, flutterflow and firebase will work for free as well. More on reddit.com

As a full stack developer with years of experience building everything from simple websites to complex web applications, I’ve worked with a wide range of tools and platforms. Over time, I’ve come to appreciate the power of no-code tools when I need to quickly build and test an app. They let me prototype and iterate fast without getting bogged down in the details of coding, which is crucial when I’m trying to validate a concept or get feedback early on. After experimenting with various options, I’ve settled on three no-code platforms that I keep coming back to for their speed and efficiency. Here’s why I love them, with a bit of my own journey mixed in: 1. Bubble Bubble is my go-to for building fully functional web apps, and honestly, it’s hard to beat. I remember the first time I used it—I was blown away by how quickly I could turn a rough idea into a working app. The drag-and-drop interface is intuitive, but what really sets it apart is the ability to handle complex logic, custom databases, and API integrations without writing a single line of code. I’ve used it for everything from minimum viable products (MVPs) to more polished projects, and it’s never let me down. One time, I needed to whip up a proof-of-concept for a client overnight, and Bubble made it happen. Plus, the community is huge, with tons of tutorials and plugins that make solving problems a breeze. Get $15 worth of free credits here to try and it with the New AI capabilities of building. 2. FlutterFlow When I need to build a mobile app quickly, FlutterFlow is my first choice. I had a project once where I needed to get a native iOS and Android app up and running in days, not weeks, and FlutterFlow delivered. Its Firebase integration made setting up the backend painless, and the visual builder let me design sleek, responsive interfaces without touching code. I remember handing off a working prototype to testers in record time—it was a huge relief to skip the usual development grind. While it’s not as versatile as Bubble for web projects, it’s a lifesaver for mobile apps when speed is the priority. 3. Webflow For websites that need to look incredible, Webflow is my pick. I once had a client who wanted a highly customized landing page with complex animations and a pixel-perfect design. Webflow gave me the control I needed to bring that vision to life without writing any CSS or JavaScript. It felt like I was designing in a sandbox where anything was possible. It’s not built for app-like functionality, but when design is the top priority and I want something that feels bespoke, Webflow is unbeatable. Why Bubble Wins for Me If I had to choose just one, it’d be Bubble every time. Its flexibility and scalability are unmatched—you can start with a simple prototype and scale it into a full-fledged app without hitting a wall. I’ve taken projects from rough sketches to robust platforms with it, and the learning curve is totally manageable. The resources and community support just seal the deal. If you’re looking for a no-code tool that can grow with your ideas and get you testing fast, Bubble’s the one I’d recommend. More on reddit.com