Kafukufuku si free, ndipo uyu ndi choletsa weniweni.
Padakali, ine mwachidule takambirana okwana zolakwa kafukufuku chimango, amene palokha ndi nkhani ya mankhwala Buku kutalika (Weisberg 2005; Groves et al. 2009) . Ngakhale chimango ichi mabuku, ambirife amachititsa ofufuza kuchoka kunja chinthu chofunika: mtengo. Ngakhale mtengo-amene angathe kuyeza ndi mwina nthawi kapena ndalama sikawirikawiri motsimikizira akambirana ofufuza zamaphunziro, ndi choletsa kwenikweni kuti tinyalanyaza pa mavuto aakulu wathu. Ndipotu, chifukwa ofufuza kuyankhulana zitsanzo za anthu osati anthu onse ndi ndalama. Choncho, mtengo ndi chofunikira kwambiri pa ndondomeko ya kafukufuku kafukufuku (Groves 2004) . A kudzipereka single okonda kuti kuchepetsa kulakwitsa pamene kwathunthu kunyalanyaza ndalama si nthawi zonse chidwi zabwino.
Pochita Munthu akamakonda ndi kuchepetsa kulakwitsa ali Chitsanzo cha phunziro wosaiwalika wa Scott Keeter ndi anzake (2000) pa zotsatira za mtengo ntchito m'munda pofuna kuchepetsa si yankho fomu telefoni. Keeter ndi anzake anathamanga Kafukufuku awiri panthawi imodzi, limodzi ntchito "Standard" ndondomeko ndi limodzi ntchito "mwakhama" njira. Ngakhale "mwakhama" njira anadzakhaladi mtengo wotsika wa sanali Poyankha, ziwerengero za zitsanzo onse anali kwenikweni chimodzimodzi. Komabe, "mwakhama" njira ndalama ziri kuwirikiza kawiri ndipo anatenga nthawi 8 bola. Tili bwinopo ndi 2 Kafukufuku wololera kapena 1 pristine kafukufuku? Nanga bwanji Kafukufuku 10 wololera kapena 1 pristine kafukufuku? Nanga bwanji 100 Kafukufuku wololera kapena 1 pristine kafukufuku? Panthawi ina ubwino mtengo ayenera kuposa yosokoneza, nkhawa sanali mwachindunji za khalidwe.
Ambiri mwayi analengedwa ndi m'badwo digito si za kulenga pafupifupi n'zoonekeratu zolakwa m'munsi. M'malo mwake, mwayi umenewu ndi za kulenga ziwerengero mtengo ndipo mofulumira, koma mwina ndi zolakwa kuti panopa apamwamba kapena zovuta kuyeza. Ambiri mwa zitsanzo mu chaputala ikufotokozera, akatswiri amene amalimbikira pa yonse single okonda ndi kuchepetsa kulakwitsa likuvutika miyeso zina khalidwe muti kuphonya mwayi zosangalatsa. Anakulira uyu okwana chimango zolakwa kafukufuku, ife tifike ku mbali zitatu zazikulu kwa nthawi yachitatu ya kafukufuku kafukufuku: njira zatsopano chifaniziro (Ndime 3.4), njira zatsopano muyeso (Ndime 3.5), ndipo njira yatsopano kaphatikizidwe Kafukufuku ndi kuda digito (Ndime 3.6).