If the name "Hot or Not" rings a bell then it's because it was a popular site launched in 2000 that allowed you to rate the "hotness" of random members of the public on a scale of 1-10. The website died years ago but the concept has now been reinvented in a Hot or Not dating app for iOS, Android, Blackberry and Windows Phone. Note that confusingly, Hot or Not is also called "Hot or..." by the developer but it's exactly the same app.
Tons of potential hotties to choose from
The idea is very simple. Once signed-in, you can scroll through countless photos of Hot or Not members. You simply tap the Heart symbol at the bottom if you think they are "Hot" and the "X" symbol at the bottom if you think they're not. When you click on the heart, a "Connection" is made and you can then send messages to that person.
There are around 5 photos of each member and a brief Bio with age and languages spoken. The profiles are Geo-matched to your current location so most of them should be within around 100km of where you are. Be warned that some of the photos in Hot or Not can be quite suggestive. While most members upload normal dating profile photos, some are more suggestive than others although no nudity is allowed.
Based on your Bio, Hot or Not tells you which of your Connections you have common interests with, how many friends in common you have (based on your Facebook friends list) and what their overall rating is from other connections they have made. If someone rates you as hot, you receive a notification of who it was with a running total of how many members think you are hot stuff.
The main problem with Hot or Not is that many of the profiles seem to be inactive. After waiting 24 hours for a reply for some of my Connections, I received no responses. Whether that's because my Connections thought I was a definite Not rather than Hot, or whether it's because the profiles are inactive/fake isn't clear. So although there seems to be an infinite number of members on Hot or Not, actually getting in touch with them isn't easy.
Confusing sign-in process
The sign-in process to Hot or Not is a bit misleading. You're given the choice of either signing in with your Facebook account or email address. However, if you choose the latter, it asks you for a password - which of course you haven't got. There seems to be no way to sign-up for an account from the app using an e-mail address so I was forced to sign-in with my Facebook account although Hot or Not state on their website that they will never post anything on Facebook without your permission.
Other than that, Hot or Not is very easy to use. In particular, anyone that's used Tinder will recognize the simple interface of Hot or Not which has is uncannily similar.
Not that hot
Hot or Not doesn't really offer any compelling advantages over dating apps such as Tinder, especially considering the user base is far smaller. However, if you're looking for love and haven't had much success on other sites, and if you can get someone to respond to you, Hot or Not is worth a try.