Here is a list of popular apps that I use:

Since I’m a fan of Apple products, I find that most daily activities can be managed with Calendar, Reminders, and Notes. These three apps link seamlessly across devices. Update something on your iPhone, and it instantly syncs to your iPad and Mac. Of course for other daily tasks, Apple offers Numbers, Pages and Keynote. 

For added functionality, I use two overlays for Contacts and Calendar from [BusyMac](https://busymac.com).

YouTube is another great resource for learning tips and tricks about these apps. Some of my favorite instructional channels include: MacMost, Proper Honest Technique, Brooke Tierney, Rich Bowlin, Peter Akkies, From Sergio, Daily Tekk, and McWhisperer. Just type their names into the YouTube search box to find their latest videos.

Obsidian (https://www.obsidian.md):  A powerful note-taking tool with two-way linking and visual mapping of notes. Notes are stored in Markdown, so they’re compatible with many apps. The graphing feature reveals clusters of connected notes—like constellations. I especially enjoy the Readwise integration, which imports highlights from Kindle books.

Todoist  (https://www.todoist.com):  A straightforward yet powerful task manager. Organize tasks by priority, date, label, or color. Easy to learn, reliable across devices, and can be part of your daily routine.

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Other Useful Apps

These are apps I’ve used in the past or still recommend, depending on your needs:

Evernote: (www.evernote.com) Once the gold standard for note-taking. After being acquired by Bending Spoons, it stumbled for a while but has regained momentum.

Trello (https://www.trello.com):  A visual project management tool, especially helpful when collaborating with teams.

Notion (https://www.notion.com): A highly flexible platform for notes and organization. Offers more customization than Evernote, though it comes with a steeper learning curve.

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Final Thoughts

There’s no single “best” app—just the one that fits your habits and goals. Some people thrive with Apple’s built-in simplicity, while others prefer the depth of tools like Obsidian or Notion. The key is to experiment, settle on a system you’ll actually use, and let the apps serve your work rather than the other way around.