91 Club: login, register, app and games, explained.

Paste a link and get a low, medium or high rating from the address alone, with the reasons listed. Nothing leaves your device.

See the average cost of a session of round-based games, and how little luck matters once the rounds add up.

Three tests on fair random rounds: how long streaks run, whether pattern rules beat guessing, and what doubling after a loss risks.

Turn a bonus offer’s turnover terms into the amount to bet, its average cost and what the bonus is worth.

Check whether a downloaded file matches the SHA-256 fingerprint its publisher printed. The file never leaves your device.

How often a crash game reaches your cash-out target, what it keeps on average, and practice rounds with pretend money.

Exact odds and the average cost of Wingo-style colour, number and big-small bets, by round length, with practice rounds on pretend money.

Paste recent results and see how they compare with random ones, with a plain verdict on each check and a test of the popular “bet the opposite” rule.

The exact chance of a run in a row somewhere in your rounds, the longest run to expect and how many rounds pass before a run turns up.

The chance of each safe pick in a Mines-style game, the payout it needs, what the game keeps, and a practice grid with pretend money.

The exact chance of every Plinko slot, what a board returns for the payouts you type, and practice drops with pretend money.

The chance of winning a roll-over or roll-under dice bet, what it pays, what the game keeps, and practice rolls with pretend money.

The exact chance of a tie, what Dragon, Tiger and Tie bets keep on average, and practice rounds with pretend money.

The exact chance of every K3-style bet on three dice, what each keeps on average, and practice rolls with pretend money.

The exact chance of every match in a pick-numbers lottery or a five-digit game, and what a ticket costs on average.

The bet ladder of a raise-after-a-loss plan, how many losses your money covers, how often it breaks and the exact average cost.

The chance of at least one, exactly k or k or more in a number of tries, plus streaks and how many tries it takes.

Odds in decimal, fractional and American form, the chance they imply, what a stake returns and the margin in a market.

Your win rate, the break-even win rate for a payout and fee, a 95% range and an exact test of whether the record could be luck.

Turn the most you will lose in one session into a stake per round, with the exact chance of going past the limit.

The gain needed to get back what you lost, the wins in a row it takes, and the exact chances of getting back or running out first.

Set a rebate, cashback or fixed reward against what the game keeps, and see the net cost and the break-even rate.

A countdown with break reminders that also shows, in rupees, what the minutes cost on average.

A private log of play sessions with totals by week and month and a CSV export, kept only in your browser.

Read the payee, amount and note inside a upi:// link or QR text, with a list of what looks odd. Nothing leaves your device.

Paste a message and see the scam habits in its words, rated Low, Medium or High, with the matched words listed. Nothing leaves your device.

Tick the permissions an app asks for and read what each can do, which a games app has no need for, and which pairs matter most.

Estimate the guesses a password might take, see which habits make it guessable, and make a random password. Nothing leaves your device.

Six common sign-in and install problems, a few yes or no questions each, and advice that ends on the one guide to read next.

Paste an Indian mobile number to see if it fits the ten-digit format, what the prefix means and which typing slip may be the problem.

Twelve checks before you install an app file, answered Fine, A problem or Not checked, with a list of what to do about each.