n pp str, ls clld n pp mrktplc r pp ctlg, s typ f dgtl dstrbtn pltfrm fr cmptr sftwr clld pplctns, ftn n mbl cntxt. pps prvd spcfc st f fnctns whch, by dfntn, d nt ncld th rnnng f th cmptr tslf. Cmplx sftwr dsgnd fr s n prsnl cmptr, fr xmpl, my hv rltd pp dsgnd fr s n mbl dvc. Tdy pps r nrmlly dsgnd t rn n spcfc prtng systm—sch s th cntmprry S, mcS, Wndws, Lnx r ndrd—bt n th pst mbl crrrs hd thr wn prtls fr pps nd rltd md cntnt.
n pp str s rstrctd, cmmrcl vrsn f pckg mngr.