Phrynobatrachus ungujae is a miniature species (SVL < 16 mm) of puddle frog restricted to coastal forest in Kenya and on Unguja Island (Zanzibar), Tanzania. Members of this genus are identified by the presence of a midtarsal tubercle, elongate inner metatarsal tubercle, and outer metatarsal tubercle. Phrynobatrachus ungujae is characterized by a warty dorsum, including snout and eyelids, and the presence of a small conical protrusion on the eyelid. Small but distinct discs are present on the toes, often terminating in points.