Singapore's Vaccinated Travel Lane system requires a negative COVID-19 PCR or ART (aka antigen, rapid, RAT) test taken within 48 hours of departure.
There are now a number of self-administered COVID-19 tests including BinaxNOW, Ellume and Qured, where you are mailed a kit and somebody guides you through testing yourself on a video chat, analyzes the results and sends you a certificate by mail. (Patrick "Ask the Pilot" Smith's blog on the topic here.) These kits are often much cheaper and more convenient than trying to find a lab locally.
Are these tests accepted for VTL pre-entry purposes in Singapore?
Update: I originally asked this question when Singapore accepted only PCR tests, but they've changed the rules and now allow ART as well. So open to new answers addressing that as well.