reporter: peace iraguha, her co-founder stephen ogweno, and a small team in rwanda's capital, kigali,pp to raise awareness. they hope to motivate young adults in particular to change their ways and lead a healthier lifestyle. peace: in the lifesten app, you can train to be healthy and also get rewarded for it. we create challenges. the more you engage in those challenges, the more points you collect, and these points can be redeemed through our partners. reporter: the app rewards users' diet, exercise, and relaxation efforts with points and prizes. this helps users learn healthier routines in a playful way. international diet and fitness trackers already exist, but they haven't had much success in rwanda. the lifesten app is not only in english and french, but also in the local language, kinyarwanda. peace: the solutions need to be home-based. we know the problem, we know the burden. we've lived with it. and my people will likely understand what i bring. so it's really easier to achieve behavior change if it's coming from someone from their communities. reporter: that's why the start-