Keep a copy that needs nothing from us
Download the viewer as one HTML file. It has no external scripts, fonts or images, so it opens from your own disk in any modern browser, with or without a connection, for as long as browsers open web pages.
It is open source under the MIT licence, and short enough to read: the whole viewer is one script. What an export contains, column by column, is documented on Your data is yours, with a sample export to try it on.
Track every transfer automatically. Orbiq keeps both your countries in one ledger and prices every transfer against the mid-market rate on its own day.