diff --git a/content/projects/bytes-formatter/index.md b/content/projects/bytes-formatter/index.md
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@@ -5,7 +5,7 @@ date = 2023-04-09
 draft = false
 
 [taxonomies]
-tags = ["js", "tools"]
+tags = ["js", "tools", "project"]
 
 [extra]
 keywords = "byte-formatter, utils, hex, tools"
diff --git a/content/projects/crypto-helper/index.md b/content/projects/crypto-helper/index.md
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--- a/content/projects/crypto-helper/index.md
+++ b/content/projects/crypto-helper/index.md
@@ -5,7 +5,7 @@ date = 2023-04-09
 draft = false
 
 [taxonomies]
-tags = ["yew", "rust", "tools"]
+tags = ["yew", "rust", "tools", "project"]
 
 [extra]
 toc = true
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+title = "dataans"
+description = "Take notes in the form of markdown snippets grouped into spaces."
+date = 2024-10-16
+draft = false
+
+[taxonomies]
+tags = ["rust", "tauri", "leptos", "project"]
+
+[extra]
+toc = true
+keywords = "Rust, Tauri, Leptos, Note-taking, Markdown"
+thumbnail = "dataans-thumbnail.png"
++++
+
+Source code: [github/TheBestTvarynka/Dataans](https://github.com/TheBestTvarynka/Dataans/).
+
+The Dataans is a desktop app that allows you to take notes in the form of markdown snippets grouped into spaces. Yes, it's another note-taking app, but with unique features I miss in all other note-taking apps.
+
+# Motivation
+
+I write notes almost every time I use my computer. Usually, it's small pieces of data/code/docs/links I found during the research or bug fixing. So, I need some place to store them and the ability to find needed pieces of information easily. I used to use a single text file and open it in Notepad or VS Code. After the research, I got the file with almost random symbols:
+
+![](./notes-example.png)
+
+Do I need to explain that it isn't convenient and hard to find anything? I needed a better solution. I tried other note-taking apps, but every one of them had flaws I didn't like a lot.
+
+## What's wrong with existing note-taking apps?
+
+I relate a lot to this blog post ([Why build a messenger app only for sending to yourself?](https://monoline.io/posts/2021/11/11/why-build-a-messenger-app-only-for-sending-to-yourself/)). I quote many key points from it but explain them in my own way and how they relate to me.
+
+1. **Too many options**. I don't need so much test editing functionality. I just want to take notes and have simle markup (styling) functionality. Something like [markdown](https://www.markdownguide.org/) or [asciidoc](https://docs.asciidoctor.org/).
+2. **Unwanted features**. This echoes the previous point, but I want to draw your attention specifically to the UNWANTED features. For example, I don't need AI to search for info in my notes. I only need a typical search engine. I don't want AI to write notes for me. I can write down my thoughts by myself.
+3. **Article-oriented mindset**. People don't think in articles. Many note-taking apps look like you are going to write an article instead of just writing down the idea, thought, or a random piece of data. When I see a blank screen with the cursor, I feel I need to write a document with a defined structure, style, and line of thought. It throws off the thoughts I wanted to write at the beginning.
+
+## Missing features
+
+Despite the listed flaws above, I still have missing features I would like to have in my note-taking app. Some of them may feel weird and illogical to you, but I know what I want :stuck_out_tongue_closed_eyes:.
+
+All note-taking apps I tried lack one or more features listed below. No one contains all of them at once (but if you find such an app, please, tell me about it).
+
+1. **Desktop app**. Yes, you heard it right. In the era of the web, I want a desktop app. Usually, the browser has dozens of opened tabs across multiple windows. It becomes hard to find the tab with notes (even when it's pinned).
+2. **Quake (drop-down) mode**. I have used the [Quake](https://github.com/Guake/guake/) terminal since 2019. I like it a lot and the most pleasant feature is a drop-down mode. I set a keybinding to the `F1` key and always have my terminal with me. I would like to have the same ability for my note-taking app because I use it often.
+3. **Cross platform**. It should behave the same on _Windows_ and _Linux_. Other platforms mey may be supported too, but it's not a requirement for me.
+4. **Markdown**. It is simple, easy to learn, and looks good. It contains a perfect set of styling and markup functionality for me.
+
+# Solution
+
+These are the two closest apps to what I want:
+
+1. [Telegram](https://telegram.org/). I have plenty of Telegram channels with one subscriber (me) where I save important, useful, and just interesting information. Despite rich Telegram features, you can understand why it isn't suitable.
+2. [Monoline](https://monoline.io/). It supports MD and has pretty UI, but I would like to organize my notes into groups (like messages are organized in channels in Telegram).
+
+I decided to write my note-taking app after many tries and thoughts. The best part of being a programmer is the ability to do everything I want with the software. It's like a limitless power in the virtual world (unfortunately, *everything has a limit*, but we aren't about that).
+
+## Tech stack
+
+We can debate a lot about the best technologies for such a project, but I already made my decision:
+
+* Main programming language: [`Rust`](https://www.rust-lang.org/).
+* App framework: [`Tauri`](https://v2.tauri.app/).
+* Frontend framework: [`Leptos`](https://leptos.dev/).
+
+I wrote a comprehensive explanation of the chosen tech stack. You can read it here: [`tech_stack.md`](https://github.com/TheBestTvarynka/Dataans/blob/main/doc/tech_stack.md).
+
+## Features
+
+![](./md-note.png)
+
+* Quake (drop-down) mode. The keybinding can be configured.
+* Cross platform.
+* All notes are markdown text. The following MD features are supported:
+  * Italic, bold, strike through text.
+  * Quotes.
+  * Links.
+  * Headers.
+  * Tables.
+  * In-line code and code blocks.
+  * Pasting images from clipboard.
+* Files can be attached to the note.
+* All notes are grouped into spaces. So, space is a collection of notes. It has name and avatar picture.
+* Common keybindings for text editing (like `ctrl+k` for creating links).
+* App can be configured using config file.
+* Color scheme also can be configured.
+* Simple note search.
+* Many different keybindings to control the application.
+
+...And more. This a short list of main futures. The full features list and user manual can be found here: [todo](#).
+
+# Moving further
+
+I'm going to continue to improve `Dataans` according to my needs. If someone wants some missing functionality, then create an issue or a discussion, and most likely I'll implement it. Or if you are interested in contributing to this project, then read the [`CONTRIBUTING.md`](https://github.com/TheBestTvarynka/Dataans/blob/main/doc/CONTRIBUTING.md) document.
+
+# References & final note
+
+1. [Dataans: Source code](https://github.com/TheBestTvarynka/Dataans/).
+2. [Dataans: Contributing guide](https://github.com/TheBestTvarynka/Dataans/blob/main/doc/CONTRIBUTING.md).
+3. [Dataans: Technical decisions explained](https://github.com/TheBestTvarynka/Dataans/blob/main/doc/tech_stack.md).
+
+I want to add only one thing: **write small programs for yourself in your favorite languages**. I'm feeling happy every time I use my own app for my needs. Even if your app will do only one task, then still create it. _No better software than software that does useful work._
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