Moving funds to savings account intended for down-payment

[Anonymous]

I have an app called Qapital, which is linked to my bank account. It rounds all of my transaction to the nearest dollar then saves it. I currently have close to $4,500 of it and would like to transfer it to my bank account in order to put it towards my down-payment. I'm sure U/W will ask what it is, and want a letter of experience. But how do I explain this? Online savings account from another source? It's just like any other online savings bank account, however I would like it to be moved to my primary checkings. 

Please provide any input or advice. 

[dragontears]

Easiest thing would be to include 2 months of statements for this account when you provide the bank statements for your checking. That way no letter would be needed

[JVille]

They will REQUIRE two month statements from the other acct and want to actually see the Electronic Transfer documented.