Planning a bachelorette or bachelor trip means three headaches: who owes who, how much booze to buy, and what to actually do. PlanYourFun solves all three with free tools that work on a shared link — no app, no account. Cost Splitter: log expenses, get the minimum set of payback transfers. Drink Calculator: a real shopping list from guest count and hours. Itinerary Builder: drag-and-drop days from curated city blocks. Plus guides for 5 US party cities and printable game packs.