Problems with ios 7

This used to be a rock-solid app, unique in its class. No longer, unfortunately. Its last update (two weeks ago, now) crashes immediately under ios 7, with no further update in sight (have tried to alert the developer, without response).

Under the latest ios 9 it seems to work well, but certain syncing anomalies have crept in, leaving it no longer 100% reliable. Hope for happier days once again, but beware of finding a given recently-created notebook empty upon opening it a second time.

Wolkenstein der Einaugig about Notebooks 8