Tools you can actually use
Everything runs locally: the maths and the judgement happen on your device, nothing is uploaded, nothing is logged, and there's no login. Open and go.
Fee calculator
Enter your order size, pick a rate, tick the BNB discount and the invite-code rebate, and see right away what one trade really costs and roughly how much a year of trading saves.
Position & stop-loss calculator
Decide the most you'll lose on this one trade first, then work back to how much to buy and where to put the stop. A beginner's first lesson in managing risk.
Withdrawal network helper
Pick your coin and destination and see whether to use TRC20 or ERC20, how each compares, and the rule that the network must match on both ends.
Exchange comparison tool
Tick what you value (beginner-friendly, fees, coins, fiat, Chinese support) and compare Binance / OKX / Coinbase / Bybit to see the best match.