"I tried rerouting a bunch of ways. The credit card site was not mobile-friendly either," Huang said. After spending several minutes trying to navigate the site, Huang gave up. A few minutes later, Huang used his smartphone to find a vacuum cleaner. He looked up several brands on Amazon and purchased one.
"I've been a loyal Wikipedia donor since I was 16 years old. But even if people want to donate, charities get in their own way so donors are put off from making donations," Huang said. "And with Amazon, I had a half-formed thought and it took 60 seconds to get a vacuum."
This tech disparity may be costing contributions and alienating younger donor bases. In its 2013 "Next Generation of American Giving" report, nonprofit software developer Blackbaud found that 62 percent of millennials identified the mobile phone as the most preferred method for charity donations.
Read MoreHoliday checklist: Choosing a charity wisely
"Every couple of weeks you get an article on how bad millennials are as people," Huang said. "It's not like we don't care about things—tech has just made it so easy to do things, except donating to charity."
Huang is hoping to change that. After graduating, he eventually quit his job at a major tech firm in Silicon Valley and partnered with two college friends to develop Charitweet, a socially conscious tech start-up that simplifies the donation process to just one tweet.