I used to design buildings. Now I design private apps & games.
Two Android apps in testing, twenty free calculators and ten small games. No ads, no trackers, and what you type stays on your device.
Two apps, built to keep your data yours.
Both are finished, both run with the network off, and both are in Google's closed test right now.
Bloom
A cozy five-minute survivor-like. You're a garden spirit: you only move, your plants fight.
- Free, no ads, no purchases
- Collects nothing, asks for no permissions
- A Daily Garden run, the same for everyone
Life OS
Tasks, notes, money, reminders and documents in one app, with an assistant that runs on the phone itself.
- Works in airplane mode
- No account, no cloud, no ads
- 15-day trial, then ₹499 once
Be one of the twelve
Google won't let a new developer publish until 12 testers have kept an app installed for 14 days in a row. Send me the Gmail your Play Store uses and I'll add you to both apps. You get them free, before anyone else.
Work out a number.
Built for India, in rupees, using the formulas banks and the tax department actually use. Every one explains the maths behind it.
EMI Calculator
Your monthly instalment, and the total interest a loan will really cost.
GST Calculator
Add GST, take it back out of an inclusive price, split CGST and SGST.
Income Tax
New regime against old, side by side, so you can see which one wins.
SIP Calculator
What a monthly investment grows into, and how much of it is your own money.
Invoice Generator
A GST invoice with every required field. Print it or save as PDF.
QR Code Generator
Links, UPI payments and WiFi. Download as an image, never expires.
Percentage Calculator
Increases, decreases and the difference between two numbers.
Age Calculator
Exact age in years, months and days, and the next birthday.
Waste ten minutes.
Small games that load in about a second and work the same on a phone as on a laptop. Nothing to download, no account.
2048
Slide the tiles, match the numbers, try to reach 2048.
Snake
The one everyone played on a Nokia. Try not to eat yourself.
Reaction Test
Wait for green, then tap. Find out how fast you actually are.
Memory Match
Flip the cards and find every pair in as few moves as you can.
Quick Maths
Sixty seconds of mental arithmetic. Harder than it sounds.
Stack
Time your taps to build the tower. One tap, surprisingly hard.
Read something useful.
One question per article, answered with real numbers, in the words you would use out loud.
How GST is actually calculated
Adding it is easy. Taking it back out of a price is where almost everyone slips.
6 min read MoneyWhat your loan really costs
Why a longer tenure feels cheaper every month and costs far more overall.
5 min read TaxIncome tax for freelancers in India
Presumptive taxation, what you can really claim, and the deadlines that catch people.
7 min readWho made all this
I am Khanjan Kavani. I trained as an architect, spent years drawing buildings and working on the structural side of the Surat Metro, and now I draw software instead. Everything on this site is free because I needed most of it myself and got tired of sites that wanted my phone number before telling me what an EMI was.
These days I build with a small team of AI agents that research, design, test and draft for me, while every decision that matters still waits for my yes. Here's how that works. The same rule runs through everything I make: no ads, no trackers, and your data stays on your device.
The day job is building custom software for businesses that have outgrown a spreadsheet. If that is you, there are five working demos and honest prices on the client work page.
Found a mistake in something? Tell me at hello@khanjankavani.com and I will fix it, usually the same week. More about me if you are curious.