Variable N (%)
How often do you log on to Grindr?
 5 or more times a day 97 (49.7)
 More than once a day but less than 5 times per day 56 (28.7)
 Once a day 19 (9.7)
 A few days a week 16 (8.2)
 About once a week 4 (2.1)
 Less than once a week 3 (1.5)
When did you start using Grindr?
 Less than 1 month ago 25 (12.8)
 More than 1 month, but less than 6 months ago 57 (29.2)
 More than 6 months, but less than 1 year ago 37 (19.0)
 More than 1 year ago 76 (39.0)
Is your face visible on your Grindr profile? (Yes) 161 (82.6)
In your photo do you show any of the following naked body parts?
 Chest 54 (27.7)
 Abs 39 (20.0)
 Arms/Biceps 54 (27.7)
 Back/Shoulders 15 (7.7)
 Legs 2 (1.0)
 None 121 (62.1)
When you use Grindr, what time of day is it usually?
 Morning 105 (53.8)
 Afternoon 145 (74.4)
 Evening 141 (72.3)
 Night (before midnight) 143 (73.3)
 Late night (after midnight) 103 (52.8)
Do you primarily use Grindr on:
 Weekends 4 (2.1)
 Weekdays 15 (7.7)
 Both 175 (90.2)
The last time you used Grindr, was it during or immediately after you had been drinking or using drugs?
 Yes 16 (8.2)
 No 170 (87.2)
 Don’t knowa 9 (4.6)
What are the reasons you use Grindr?
 To make new friends 155 (79.5)
 To meet people to have sex/hook up with 127 (65.1)
 To find someone to date 126 (64.6)
 To “kill” time 166 (85.1)
 To connect to the gay community 127 (65.1)
 To find people to drink/use drugs with 23 (11.8)
 To communicate with in-person friends 60 (30.8)
 To reconnect with people from the past 24 (12.3)
What is your number one reason for using Grindr?
 To make new friends 40 (20.5)
 To meet people for to have sex/hook up with 52 (26.7)
 To find someone to date 43 (22.1)
 To “kill” time 42 (21.5)
 To connect to the gay community 14 (7.2)
 Other 4 (2.1)
Ever had sex with a partner met on Grindr
 Yes 147 (75.4)
 No 48 (24.6)
Mean number of lifetime male anal sex partners (SD) 31.8 (87.0)
Mean number of recent (past 30 day) male anal sex partners (SD) 2.5 (7.7)
Table 2: Grindr Use Characteristics and Behaviors (N=195).