Tools for your business. Games for your brain.
We build practical software for people who run real businesses — and puzzle apps for people who like to keep their minds sharp.
Three keep a business's stock, sales and cash honest. The fourth keeps your mind sharp. All four are built the same way — offline-first, no clutter, no nonsense.
A fast, no-fuss calculator built for the shop sale counter, not general arithmetic. Pack-size keys turn a unit count into a case total in one tap, a running total and independent memory stay visible at all times, and a full transaction tape logs every calculation of the session — shareable to WhatsApp in one tap. A built-in unit converter handles local land and gold units like ankanam, cent, guntha and tola.
A free, offline Sudoku puzzle app with six genuine difficulty levels — Easy through Grandmaster — plus a 500-level Journey across six regions, Daily Challenges, Weekly Goals, and achievements. Every puzzle is generated using real human solving techniques and verified solvable by logic alone, with no guessing required.
A specialized retail inventory and accountability tool, originally engineered for licensed wine and liquor retailers in Andhra Pradesh and Telangana. WinEntry automates daily opening-vs-closing stock reconciliation with unit-level tracking, invoice import, profit and stock-value reports, and a Daily Sale Summary you can share to WhatsApp — in a bilingual English/Telugu, offline-by-default design adaptable to any business that manages stock by count and size.
A daily cash book for a business with one branch or many. Record each day's expenses, sale, UPI and bank deposits in a few taps and see the cash balance at once, with expense and reconciliation reports to share as PDF or Excel, and encrypted backups. Fully offline — no account, no ads, no tracking.
We started by solving a real, unglamorous problem for real businesses. We're now applying the same care to something people do for fun.
Simhadri Systems began with WinEntry — practical, offline-first retail software solving a genuine daily problem for licensed wine and liquor retailers: honest, accurate stock reconciliation, in a bilingual interface built for the people who actually use it. eCalc extends that same shop-floor focus to the sale counter itself — a calculator built around pack sizes and running totals instead of general arithmetic — and Expense Tracker covers the cash side: each day's expenses, sales and deposits, for one branch or many.
eSudoku is our first step into brain-training entertainment — a Sudoku app built with the same standards as our business tools: no shortcuts, no filler, puzzles that are genuinely fair because they're solvable by logic alone.
Simhadri Systems builds software with two different audiences in mind: business owners who need tools that just work, and puzzle players who want a genuine challenge. WinEntry came first, built to solve a real day-to-day problem for retail stock management, and eCalc followed to solve the counter-side half of that same problem. Expense Tracker followed for the day's cash and expenses. eSudoku is the newer side of that same philosophy, applied to something people do for fun rather than for work.
