[jakozaur]

Nice trick, though not that practical.

1% of oversee spending may be to little benefit for the cost: 1. Get more than one card with zero foreign transaction fees. Make sure you won't get charged yearly fee on those.

2. On every transaction, check the rate on smarthphone. Oh, you want to buy $3 coffee, let me check my rate to see if I can save $0.03.

3. More cards is more monitoring hassle. Harder to track, more hassle if they get stolen and you need to block them all. Also payback program tracking is much harder.

4. Same with fees and interests. More card is more likely that you miss some payments and get charged interests/overdraft. One incident and you whole savings can go away. Even with autopayment you need to make sure you balance your accounts.

[jannotti]

I think, but I'm not sure, that you're overstating the complication. Looking at your four steps: 1. Everyone should have two credit cards. You don't want a single point of failure (mistaken fraud freeze, for example.) 2. You only check every day, not every transaction. 3. Again, I argue you should have two (Visa + Mastercard) 4. Again. You're just trying to make things sound hard by repeating the same thing.

So. Have two cards. Make sure they autopay themselves. The only new work is checking the exchange rates once a day.

[shivpatelssp]

@jannotti Couldn't have explained it better! Only clarification I'd make is you can use this for more than two cards.