Android and BlackBerry versions were launched in October 2011 and have received over 500 downloads.
A poll of 123 intermediaries on TMW’s website between 8th February and 16th February showed that 60% of advisers use an iPhone or an iPad.
The app, titled Buy to Let Affordability Calculator, was based on TMW’s “how much can be borrowed?” calculator.
It allows intermediaries to work out how much their client could borrow from TMW after entering the estimated purchase price and estimated rental income on a property.
Ian Andrew, managing director of intermediary sales at Nationwide, said: “The app has already proved popular with intermediaries but now that it is available on all major mobile devices we expect many more advisers to download this useful tool.
“Brokers can check the maximum amount TMW could lend their client even when they aren’t logged on to their computer. The app is really easy to use and is part of our ongoing commitment to making life easier for brokers.”
