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WOWHOW FIELD NOTES · № 076FRI, MAY 29, 2026 · PUNE ISTSHIPPED WEEKLY · 7:00 AM

Field Notes for builders
who actually ship.

No listicles. No AI slop. Every post comes from code we deployed, bills we paid, and customers who complained. Written by the founder and two contributors — nobody else.

Articles published

288

Free tools

Products reviewed

1,960

Avg read time

8 min

Featured · AI for Beginners/9 min read/1w ago

Income Tax Calculator India 2025-26: Old vs New Regime Complete Guide

The 2025-26 budget made the New Regime the default for all taxpayers. But “default” does not mean “better.” For salaried individuals with a home loan, HRA, and 80C investments, the Old Regime still wins in many cases. Here is how to calculate which one is right for you.

WOWHOW Team

Founder · WOWHOW

Published

May 21, 2026

Read time

9 min

Stack

Income Tax · Tax Calculator · Old Regime

Read the full note

WOWHOW / AI FOR BEGINNERS1w ago

The 2025-26 budget made the New Regime the default for all taxpayers

⚡ 9 min— WT

We only write about what we deployed.We only link to what we bought.We name names when something sucks.

10 notes

AI for Beginners9 min

GST Calculator India: How to Calculate CGST, SGST & IGST on Any Product

GST has been in effect since July 2017, but the confusion between CGST, SGST, and IGST persists across small businesses, freelancers, and buyers. The formula is straightforward once you understand when each component applies — and a simple calculator handles the rest.

WTWOWHOW Team

1w ago

AI for Beginners11 min

SIP Calculator India: How to Plan Mutual Fund Investments 2026

A SIP of ₹10,000/month for 20 years at 12% CAGR grows to ₹98.9 lakhs — but the same investment at 10% CAGR yields only ₹75.9 lakhs. The 2% difference matters. Here is how to use a SIP calculator to model your investment plan accurately.

WTWOWHOW Team

1w ago

AI for Beginners4 min

Why Your AI Prompts Suck (And How to Fix Them Today)

The most common prompt engineering mistakes with before/after examples. Fix these 10 errors and immediately get better AI output from any model.

Aanup

2mo ago

AI for Beginners5 min

The 15 Best Free AI Tools in 2026 (Ranked by Real Users)

Comprehensive ranking of the 15 best free AI tools in 2026. We surveyed 2,000+ users and tested every free tier to find what actually works without paying.

Aanup

2mo ago

AI for Beginners4 min

How to Use DeepSeek for Free: Complete Tutorial (2026)

Complete tutorial for using DeepSeek AI for free in 2026. Setup guide, best prompts, comparison with paid alternatives, and tips for getting the best results.

Aanup

2mo ago

AI for Beginners6 min

How to Write Prompts That Get 10x Better AI Output

Beginner-friendly guide to writing better AI prompts. Learn the 5 rules that transform vague prompts into ones that produce professional-quality output every ti

Aanup

3mo ago

AI for Beginners7 min

The Ultimate Beginner s Guide to AI in 2026 (No Tech Background Needed)

Complete beginner s guide to AI in 2026. Learn what AI is, how to start using it, the best free tools, and write your first prompts — no technical background ne

Aanup

3mo ago

AI for Beginners7 min

The AI Feature Hidden in Plain Sight That Nobody Talks About (Feb 2026)

Context windows are AI s most powerful feature that 90% of users ignore. Learn how to unlock massive productivity gains with this overlooked capability.

Aanup

3mo ago

AI for Beginners7 min

AI Tools Are the New Electricity—Most People Are Still Using Candles

Why 90% of professionals are barely scratching the surface of AI s potential. The simple shift that transforms how you work with artificial intelligence.

Aanup

3mo ago

Monday memo · Free

One note, every Monday. 7am IST. Zero fluff.

1 field report, 3 links we stole ideas from, and 1 product we actually bought. Read by 11,200+ builders.

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Field Notes for builderswho actually ship.

Income Tax Calculator India 2025-26: Old vs New Regime Complete Guide

GST Calculator India: How to Calculate CGST, SGST & IGST on Any Product

SIP Calculator India: How to Plan Mutual Fund Investments 2026

Why Your AI Prompts Suck (And How to Fix Them Today)

The 15 Best Free AI Tools in 2026 (Ranked by Real Users)

How to Use DeepSeek for Free: Complete Tutorial (2026)

How to Write Prompts That Get 10x Better AI Output

The Ultimate Beginner s Guide to AI in 2026 (No Tech Background Needed)

The AI Feature Hidden in Plain Sight That Nobody Talks About (Feb 2026)

AI Tools Are the New Electricity—Most People Are Still Using Candles

One note, every Monday. 7am IST. Zero fluff.

Need production-ready templates?

Field Notes for builders
who actually ship.