Algorithms: Explained and Anim

My Experience with Algorithms: Explained and Anim

I’m not a computer science student, but I’ve been trying to learn some basic coding for a personal website project. Last month, I kept getting stuck on how to efficiently organize a list of user-submitted dates. My friend mentioned “sorting algorithms” and my eyes just glazed over. I downloaded this app on my Galaxy S23 thinking it might help, but I honestly expected another boring textbook-style explanation. I was wrong. I remember sitting at my kitchen table on a Tuesday night, coffee gone cold, and tapping on “Quick Sort.” Instead of a wall of text, it showed a bunch of colorful bars. I tapped “next,” and I watched it pick a bar, move others around, and split the group. I tapped next again. And again. After about ten steps, I actually got it. It wasn’t magic, it was just a clear, visual process. That was the moment I stopped feeling intimidated. I’ve opened it a few times a week since then, whenever a coding tutorial mentions a term I don’t recognize, like “binary search” or “BFS.” It doesn’t make me an expert, but it makes the starting point way less scary.

Features Worth Noting

The best thing about this app is that it doesn’t try to do too much. You open it, and you get a list of algorithm categories. You pick one, and you’re immediately looking at an animation with a play and a next button. That next button is everything. It lets me go as slow as I need to. I can stare at the screen, figure out why a particular number moved, and then move on. The text on the side is helpful, but I mostly just watch the animation a few times until the pattern makes sense. The sorting section is where I’ve spent most of my time. Seeing Bubble Sort slowly shuffle things around compared to the quicker, smarter moves of Merge Sort really shows you why efficiency matters, without ever saying the words “time complexity.” It just feels obvious. I also poked around the graph algorithms. Watching the little node explorer move through a maze for Depth-First Search helped me picture how my navigation app might figure out a route. It’s all very straightforward and focused.

What Needs Work

While the app works perfectly fine on my phone, I did notice one thing. Some of the more involved animations, like the ones for the graph algorithms with lots of lines and nodes, can get a tiny bit choppy if I try to speed through them with the play button. It’s not a deal-breaker—the step-by-step mode is always smooth—but it’s noticeable. My other wish is for a few more real-world examples. I understand how the algorithm moves now, but a one-sentence note saying “This is like finding the shortest path on a map” or “This is how your phone’s contacts are sorted” would bridge the gap between the animation and my project. Right now, I have to make that connection myself, which is good practice, but sometimes a little hint would be nice.

Pricing

It’s free. No ads popping up, no “pro version” nag screens, no subscription hidden behind a tutorial. I kept waiting for the other shoe to drop, but it never did. For an app that solved a real point of confusion for me, that’s pretty incredible. I’ve paid for apps that did a lot less. Knowing it’s completely free makes me more likely to just open it on a whim when I’m curious about something, instead of feeling like I need to “get my money’s worth” out of a paid tool.

Developer Notes

I haven’t had any problems, so I didn’t need to contact support. But I did scroll through the reviews on the Play Store before writing this. A lot of people seem to really like it, and several mentioned that the developer, Moriteru Ishida, actually adds new algorithms based on user suggestions. I saw an update a couple weeks ago that added a new one I hadn’t seen before. That tells me the developer isn’t just letting the app sit there; they’re still putting work into it, which is a good sign. It feels like a passion project, not just something slapped together to make a quick buck.

Security & Privacy

This is simple. The app doesn’t ask for any permissions. It doesn’t need access to my contacts, photos, location, or anything. As far as I can tell, it just runs on my phone. There’s no login, no account, no data collection. It works completely offline after you download it. I appreciate that. I don’t have to worry about what it’s doing in the background. It’s just a self-contained learning tool, and that’s exactly what I wanted.