Yathit mobile app support SugarCRM 6.5 and up or SuiteCRM 7.0 and up. Yathit mobile app support all editions (Community, Pro, etc) of SugarCRM.

Yathit mobile app can be used with SugarCRM older version, like SugarCRM 5, but some meta data like module layout are not available and sthere are some missing REST API parameters. And hence, there will be some with module layout and unexpected error.