She is petite, pretty, and well dressed, but Amy Parker admits that it wasn’t always this way. The recovering tomboy once cared more about baseball than Vogue or InStyle. She grew up in a family of sports-loving men, and then wound up in “an office of really geeky guys.”

Given her grass-stained past and nerd-herd present, it seems that Parker, who is based in South Boston, has no business developing an iPhone fashion app that helps people dress. She even has the nerve to write a fashion blog (www.goodlooks
daily .com). But she is one of the first to admit that her leap into high (tech) fashion is equal parts commerce and style self-help.

Parker, 30, a graphic designer, and her boyfriend Dan Perrera, 29, created an app called Good Looks. The purpose is simple: It helps users remember what they wore and when they wore it. It’s the kind of tool that a budding fashion maven such as Parker finds essential in her current transformation from sweat pants to skirts.

“I don’t think any of us really remember what we wore two weeks ago,” says Parker. “And there’s the question of how often we’ve worn the same thing. We all have our go-to clothes — the things that we pull out of the closet when we’re running out the door because it’s easier than thinking about what else is in there.”

Given her style-impaired beginnings, Parker, with the help of Perrera and a developer, focused on making Good Looks simple. Snap a picture of what you’re wearing each day and it goes into a calendar. Add tags such as “red blouse” or “cashmere sweater” to help identify and search for the outfit later. Each day’s outfit is cataloged. Scroll back through the calendar to avoid the embarrassing faux pas of repeating an ensemble on the next important date or business meeting.

Parker says using it every day helps keep it all organized. After a few weeks, users have a clearer idea of the contents of their closet — what they wear and what they can get rid of. There’s also a built-in weather forecast, to let users know if that sundress is practical for conditions, and an area for comments.

“If you wore an outfit one day and received a lot of compliments, you can note that,” she says. “Or, if people made fun of you for wearing something, you can make a note of that to avoid future mistakes.”

Similar apps exist, but Parker says they require emptying the contents of your closet and photographing and cataloging each item. The work involved with Good Looks entails taking a picture of yourself in the mirror each day, or enlisting a friend or spouse to take the picture.

“The last thing I want to do is take everything out of the drawers and take pictures of each thing,” she says.

As she scrolls through Good Looks to demonstrate how it works, she also notices the progress of her own style.

“I don’t feel like a fashion outsider anymore,” she says. “I’ve been studying this. Once I told myself I was a fashion stylist, I dove right in and loved it.”