Keep crashing for a few days with iphone app.

Keep crashing for a few days with iphone app. I'm last version of zoho app with last version of iPhone iOS. When I installed it 2 weeks ago it worked well. But now, it keep crashing everytime I enter in it. After 5 or 6 "send crash info"... the message disappear but I'm pushed out of the app a few seconds later when I click somewhere.