Sav Zigzag is a mobile object relational DBMS (ORDBMS) supporting Zigzag language, more expressive than SQL and XQuery. It represents a Java library or API interface, old versions of which were distributed with name Sav ZAPI. This interface forms a new powerful "Java/Zigzag" language, for development of the high-performance database applications. Zigzag algebraic expressions enable lightly to process not only tabular data but also hierarchic, for example XML with its dynamic and multi-level structure. DBMS Sav Zigzag may be installed on PC, PDA and even on the mobile phone (smartphone, commutator).