The RunForth app always loses connection (Read 21 times)

Hi, in the last days RunForth always loses the GPS signal and doesn't track my route. It starts recording, then it suddenly stops. Or, even worse, it never starts recording the route so I finish my one-hour run and the app says I've run too short a distance to be recorded. Very disappointing!

Please notice: I have not changed my routes. Previously they were recorded exactly and completely.

Anyone havin' the same trouble?

Any suggestions?

(I use an iPhone 5s).

Thxs!