What if one friend forgets to log their expense?

Make it a group rule: expenses not logged within 24 hours are considered 'paid for' by that person and won't be reimbursed.

How do we handle shared groceries?

Split the grocery bill by the number of people eating, even if someone didn't eat the specific items; it's easier to maintain group harmony than to argue over who ate the last slice of ham.

Should we share a credit card?

No. Use personal cards for all purchases and log them in the app. Sharing a physical card creates liability issues and makes it impossible to track individual spending habits.

How to split travel costs fairly with friends

Use a shared expense tracking app like Splitwise from the moment you leave home to log every group purchase in real-time. Settle all outstanding balances exactly 24 hours before the trip ends to avoid currency exchange confusion and post-trip resentment.

Set a transparent budget before booking. Have a frank conversation about daily spending limits. If one person wants 5-star hotels and another prefers hostels, decide on a 'base' standard for shared costs and let individuals book their own luxury upgrades separately.
Designate a 'Trip Treasurer'. Assign one person to manage the group account in Splitwise. While everyone should log their own expenses, the treasurer acts as the final arbiter for settling up to ensure no double-counting occurs.
Establish the 'Shared vs. Personal' rule. Agree that shared costs (taxis, group dinners, Airbnb rent) go into the app. Personal costs (souvenirs, snacks for yourself, individual coffee runs) stay out of the app. If you aren't sure, assume it's personal.
Settle up in a single currency. Pick one currency for the app (usually the local currency or your home currency). When settling at the end, use a platform like Wise or Venmo to handle the transfers, avoiding cash exchanges which are impossible to track accurately.

What if one friend forgets to log their expense?: Make it a group rule: expenses not logged within 24 hours are considered 'paid for' by that person and won't be reimbursed.
How do we handle shared groceries?: Split the grocery bill by the number of people eating, even if someone didn't eat the specific items; it's easier to maintain group harmony than to argue over who ate the last slice of ham.
Should we share a credit card?: No. Use personal cards for all purchases and log them in the app. Sharing a physical card creates liability issues and makes it impossible to track individual spending habits.