Searching "best expense splitting app" mostly turns up listicles that read like nobody involved has actually lived with roommates. Here's a more practical way to evaluate one: what do you actually need it to do, and which real options handle that.
What to actually check for
Does it work for India specifically? A lot of expense-splitting apps were built assuming Venmo or a US bank transfer exists. If a group's actual settle-up method is UPI, an app that has no concept of UPI at all is going to leave a gap between "the app says who owes what" and "the money actually moved."
Is it free for the basics? Splitting rent with your flatmates shouldn't come with a subscription. Most tools in this space are free for the core loop (adding expenses, calculating splits) and only charge for extras - check exactly where that line is before assuming.
Does it handle more than just splitting? A lot of shared-living money admin is outside "who owes what for dinner" - warranty cards for shared appliances, EMI or bill due dates, money lent to one specific person rather than the whole group. Most splitting apps don't touch any of this, which means you're back to juggling a second system for it anyway.
Does it stay usable once the group gets past three people? Some tools that feel clean for two roommates get genuinely confusing once a trip group hits six or seven people and a few dozen expenses.
Where the real options land
Splitwise is the app most people have already heard of, and for good reason - it's been the default expense-splitter for years, with solid group-expense tracking and IOU simplification. It's not India-specific and doesn't touch UPI, warranty tracking, or bill reminders - it does one thing, and does it reasonably well.
UPI apps' built-in split features (a few payment apps now have a basic "split this payment" option) are convenient when you're already paying and want to split in the same motion, but they're built around a single transaction, not an ongoing shared budget you track over a month.
BudgPay is built specifically around Indian shared-living patterns: group budgets for a flat, family, or trip; the fewest-transfers settlement math; and, unlike most splitters, a Personal Ledger for one-off lending outside any group, and Bills & Warranty for tracking invoices and warranty cards. It doesn't yet handle in-app UPI payments - that's on the roadmap - so today it's a tracking and organizing tool, not a payment one, which is worth knowing upfront if that's specifically what you're looking for right now.
It matters what scale you're actually solving for
Two roommates splitting a predictable rent and one electricity bill a month don't need much - a UPI app's built-in split feature, or even just alternating who pays, covers that fine, and adding a dedicated app on top would genuinely be overkill for a problem that small.
The calculus changes once you're managing an ongoing household with a handful of recurring costs, a rotating cast of trip groups, and the occasional one-off loan to a specific friend that has nothing to do with the flat's shared budget. That's a fundamentally different amount of bookkeeping than "split this one dinner," and it's the point where a dedicated tool starts earning its place instead of being one more app on the phone for no real reason.
Switching costs are real, so factor them in
Whatever tool a group is already using has a real, if invisible, switching cost: months of expense history, an established habit of everyone actually logging things, and the mild friction of getting five flatmates to install one more app. This is a legitimate reason groups stick with an imperfect tool longer than they should - not laziness, just accurately weighing the hassle of migrating against the hassle of what's not working.
The honest advice here isn't "switch immediately." It's: if the current system is actively causing arguments or someone's quietly doing free unpaid bookkeeping for the group, that ongoing cost is bigger than a one-time switching cost, even though the switching cost is the one that's visible upfront.
The honest takeaway
If all you need is dead-simple bill splitting between two or three people, several options handle that fine, including the built-in feature in whichever UPI app you already have open. If you're managing an ongoing household with recurring costs, warranty-tracked appliances, and the occasional one-off loan to a specific person - not just group expenses - that's the gap BudgPay is built to close, and it's worth trying against whatever you're currently patching together with a spreadsheet and a payment app's split button.