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.
Two keep a shop's stock and sales honest. The third keeps your mind sharp. All three 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 as a real audit trail — with true left-to-right math, no textbook order of operations.
A free, offline Sudoku puzzle app with six genuine difficulty levels — Easy through Grandmaster — plus a 500-level Journey mode, Daily Challenges, 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, a bilingual English/Telugu interface, and a privacy-first, offline-by-default design — adaptable to any business that manages stock by count and size.
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.
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. eSudoku is the newer side of that same philosophy, applied to something people do for fun rather than for work.
