Learning library
Learn
Guides and tutorials for developers and everyday tech users.
Learn is the slower, more structured side of TellaDev. Blog posts often explain a specific argument or trend; these guides are meant to be returned to while you practice.
The library is split into everyday tech, developer fundamentals, and roadmaps. Pick the area that matches your current blocker, then follow the articles in sequence when a topic has an obvious progression.
Everyday Tech
13 guidesPractical technology habits for people who want their devices to feel less mysterious.
Best for quick wins. Pick one guide, apply two or three changes, and come back when another daily friction point appears.
Free Up Phone Storage Without Losing Anything Important
Reclaim gigabytes of space on your phone with these safe cleanup strategies.
Smartphone Photography Tricks the Pros Use
Elevate your phone photos with techniques that go beyond point-and-shoot.
Your Phone's Built-In Tools You Didn't Know Existed — No App Downloads Needed
Discover the hidden built-in tools on your iPhone and Android — scanner, magnifier, translator, level, and more — that replace dozens of apps.
Smartphone Tricks for Travelers: Offline Maps, Translation, and Hidden Gems
Essential smartphone tips for travel — offline maps, translation, eSIMs, safety prep, and more to keep you connected anywhere.
The Ultimate Guide to Extending Your Phone's Battery Life (Android & iPhone)
Stop your phone from dying by 3 PM — learn the real battery killers and simple settings fixes for Android and iPhone.
Stop Scrolling, Start Using: Underrated Phone Features You're Ignoring
10 powerful phone features you're not using — focus modes, password managers, widgets, automation, and more for iPhone and Android.
Wi-Fi, Bluetooth & NFC Tricks That Simplify Your Daily Routine
Go beyond basic connections — learn Wi-Fi sharing, Bluetooth multipoint, NFC automation, and smart routines for iPhone and Android.
How to Spot and Avoid Phishing Scams in 2026
Learn the telltale signs of phishing attacks and how to protect yourself.
Why Two-Factor Authentication Is Non-Negotiable
2FA is the single most effective step you can take to secure your online accounts.
Staying Safe on Public Wi-Fi: A Practical Guide
Public Wi-Fi is convenient but risky. Here's how to use it without exposing your data.
The Best Note-Taking Apps for Every Workflow
From quick capture to full knowledge management, here's which app fits your style.
Todoist vs Things 3 vs TickTick: Which Task Manager Wins?
A head-to-head comparison of three popular task managers to find your best fit.
5 Calendar App Tips That Actually Save Time
Stop using your calendar as a simple schedule and start using it as a productivity system.
Developer
12 guidesDeveloper fundamentals written for working practice: Git, Docker, terminal fluency, shell scripting, and systems knowledge that makes debugging less random.
Best for skill depth. Read in order inside a topic, then practice with a real repo or local project before moving on.
Docker Fundamentals
Understand containers, images, and Docker Compose to build consistent, portable development and production environments.
Git Version Control
Master Git fundamentals: commits, branches, merging, and collaborative workflows for professional development.
Terminal & Command Line
Navigate the command line with confidence. Learn essential commands, shell shortcuts, and productivity techniques.
Docker Compose for Multi-Container Apps
Define and run multi-container applications with Docker Compose — databases, APIs, and frontends together.
Git Branching Strategies
Compare GitFlow, trunk-based development, and feature branches to choose the right workflow for your team.
Bash Scripting Fundamentals
Write your first bash scripts: variables, loops, conditionals, functions, and handling command output.
Writing Efficient Dockerfiles
Build smaller, faster, more secure Docker images with layer caching, multi-stage builds, and minimal base images.
Git Rebase: Clean History Without the Mess
Learn when and how to use git rebase, interactive rebase, and squashing to keep your commit history clean.
Shell Productivity Tricks
Speed up your terminal workflow with aliases, functions, history search, and keyboard shortcuts.
Docker Volumes and Networking
Persist data across container restarts and connect containers together with Docker volumes and networks.
Collaborative Git Workflows
Pull requests, code review etiquette, and merge strategies for teams working together on GitHub.
Tmux: Terminal Multiplexing
Manage multiple terminal sessions, split panes, and keep long-running processes alive with tmux.
Roadmaps
3 guidesStructured paths for learning a larger domain without getting lost in tool lists.
Best for planning. Use these before buying a course or starting a large learning sprint.
Frontend Development Roadmap
A structured path from HTML basics to modern React and TypeScript, covering everything you need to build great web interfaces.
Backend Development Roadmap
Learn server-side development: APIs, databases, authentication, and deployment to build robust, scalable applications.
DevOps Roadmap
Master the tools and practices that bridge development and operations: CI/CD, containers, infrastructure as code, monitoring, and cloud platforms.