The Dodo Play Blog
Plain-language explainers behind the formulas our tools use — GST, EMI, SIP, BMI, compound interest, password security and more.
How QR Codes Actually Work: The Tech Behind the Square You Scan
Why QR codes look the way they do, how a phone camera reads one in a fraction of a second, and why they still work even when part of the code is damaged.
What Is Base64 Encoding, and Why Does the Internet Rely on It?
Base64 isn't encryption and doesn't compress anything — here's what it actually does, why it makes data larger, and where it quietly shows up every day.
Why Properly Formatted JSON Saves Developers Hours
What JSON actually is, why a single missing comma breaks an entire file, and why a formatter/validator is one of the highest-value tiny tools a developer can keep bookmarked.
What Is a UUID, and Why Does Almost Every App Use One?
What a UUID actually is, why software prefers it over simple incrementing IDs, and what the different UUID versions mean.
How Random Number Generators Actually Work
The difference between the 'random' numbers most software uses and the cryptographically secure kind that passwords and security systems actually need.
BMR vs TDEE: What Your Body Actually Burns Each Day
The difference between BMR and TDEE, why one number alone doesn't tell you much about weight management, and how activity level changes the real figure.
Percentages Made Simple: The Formulas You Actually Use
The three percentage calculations that cover almost every real situation — finding a percentage of a number, finding what percentage one number is of another, and percentage change.
How Age Calculators Actually Work (and Why Manual Math Gets It Wrong)
Why counting your age by hand is more error-prone than it looks, how leap years and varying month lengths trip people up, and how an age calculator handles it correctly.
How to Create a Strong, Unbreakable Password in 2026
What actually makes a password hard to crack, why length beats complexity, and the habits — like reuse — that undo even a strong password.
The Power of Compound Interest: Why Starting Early Matters
A closer look at why the same monthly investment produces very different outcomes depending on when you start, using a simple side-by-side example.
What Is BMI? Understanding Body Mass Index and Its Limits
What BMI actually measures, how the categories are defined, and why it's a useful screening tool but not a complete picture of health.
SIP vs Lump Sum: Which Investment Strategy Wins?
Two common ways to invest in mutual funds — investing everything at once, or spreading it out monthly — and what actually determines which one comes out ahead.
Understanding Loan EMI: How Banks Calculate Your Monthly Payment
What actually happens behind an EMI figure — the reducing-balance formula banks use, why your interest-to-principal ratio shifts over time, and how tenure trades off against total interest.
How to Calculate GST in India: A Complete Guide
A plain-language walkthrough of how GST works in India — the current slabs, how CGST/SGST/IGST differ, and how to add or remove GST from any amount by hand.