I discovered this tip calculator after constantly struggling with splitting bills and calculating tips when dining out with friends. Math anxiety is real, especially after a few drinks! I built tipcalculator.top to solve this everyday problem with a clean, simple interface that works perfectly on mobile. The reverse calculator feature (which helps figure out the original bill amount from the total) came from my own frustrating experience trying to reconcile credit card charges. I'd love to hear how others use it and what features would make it even more helpful - maybe custom presets for different countries or integration with expense tracking apps? Your feedback would really help shape where this goes next!