We　designed,　realized,　and　tested　a　pocket　module　that　allows　performing　off-axis　Digital　Holography　microscopy　with　no　need　for　an　interferometer　setup.　A　commercial　plastic　chip　is　engineered　for　the　scope.　Our　strategy　is　moving　complexity　from　the　reconstruction　algorithms　and　the　external　imaging　apparatus　to　the　chip　itself,　using　custom　optical　components.　We　functionalized　the　chip　with　a　photoresist　grating　and　polymer　lenses,　to　avoid　the　need　for　a　reference　arm　as　well　as　external　optical　components.　Thanks　to　the　single　beam　scheme,　the　system　is　robust　against　vibrations　and　the　stability　of　fringe　patterns　implies　enhanced　portability.