Money Pie. Debts and loans tracking.
Money Pie keeps history of debts and computes balance, so you don't need to remember who owes whom and why.
Money Pie is a social bot, so it notifies you and your friends when balance changes.
Use as many currencies as you like.
Use quick menu and proactive suggestions or natural language to talk to Money Pie. With time it will understand you even better.
Try it, it is easier than an app.