Obsidian

I've used Obsidian for a couple years. It's a very good note-taking app. Vault (a paid add-on) makes syncing across devices effortless, but other cloud solutions also work. Composing in markdown's fast: your hands never leave the keyboard. It stores notes in markdown, so there's no lock-in: you can open them in a text editor. Once a note is synced to your device, you can reliably get to it even when you're offline. Quirks are in tables (a bit clunky) and the outline (hard to find on phones).

The best note-taking app I've ever seen. I've been using it for two years now and it's become like my own. The advantages of this application essentially depend more on the user himself, but here is a list of common ones: 1. completely free, not a hint of premium (only paid synchronization between devices, which is very easy to set up manually for $ 0). 2. It has a very nice default interface. 3. Fast work. There is only one disadvantage: FOMO from the number of custom themes and plugins

Really, really good app! The slow startup speed is fixed now! Both, the desktop and the mobile apps start pretty fast. The only thing to improve, IMO, is the finicky "Send to" Obsidian on Android. It often reloads the app every time it's used, even if I just switched from the app (its battery settings are set to "no restrictions", so it shouldn't be killed). Another killer useful feature on mobile would be a quick note feature!