Hard concepts in plain English
A glossary of software, AI, blockchain, and fintech terms — written for founders and technical leaders deciding what to build next. No jargon, no hype.
Understanding Kotlin
Kotlin is a concise, statically typed language from JetBrains and Google's preferred choice for Android. Here are its features, how it compares to Java, and when it fits.
What a progressive web app is
A progressive web app is a website that installs to the home screen, works offline, and can send push notifications from one web codebase, with no app store in the middle. Here is how it works and when it fits.
The Swift programming language
Swift is Apple's modern, type-safe programming language for building native iPhone, iPad, and Mac apps, usually with SwiftUI. Here is how it works, when it fits, and the trade-offs against cross-platform.
How AI agents work
An AI agent wraps an LLM in a loop that can plan, call tools, read the result, and decide the next step. Here is how agentic AI works, the architectures teams use, and what production really demands.
What asset tokenization is
Asset tokenization represents ownership of a real-world asset (property, credit, funds) as a blockchain token. Here is how it works, what can be tokenized, and the compliance that makes it real.
How blockchain works
A blockchain is a shared, append-only ledger replicated across many computers that agree on its contents through consensus. Here is how blocks, hashing, and consensus work, plus the trade-offs it forces.
Native vs cross-platform app development
Native builds a separate app per platform for peak performance; cross-platform ships iOS and Android from one codebase, faster and cheaper. Here is how they differ and how to choose.
Inside crypto exchanges
A crypto exchange is a marketplace that matches buyers and sellers of digital assets. Here is how centralized and decentralized exchanges work, what they charge, and where the counterparty risk hides.
Understanding crypto wallets
A crypto wallet stores the private keys that prove ownership of on-chain assets — it does not hold coins. Here is how keys work and how the main wallet types compare.
A guide to decentralized finance (DeFi)
DeFi rebuilds financial services (lending, trading, saving, yield) as smart contracts anyone can use without a bank or broker. Here is how the core building blocks work and where the risk actually lives.
Can't find what you're looking for?
Tell us which concept is blocking a decision. A senior engineer writes the explainer — usually within a week.