It could have just been the android app logo (Over 30,000 Apps) too. (kickstarter.com)
There's also an Always - on screen you can activate, giving a permanently visible clock on the lock screen, along with any notifications indicated by small app logos. (pocket-lint.com)
Grindr and Hornet began providing safety info & tips in Arabic to inform users about risks but without implementing changes to protect them too - say, eliminating watermarked app logos on photos, which have been used as evidence in court and blackmail attempts. (onlinepersonalswatch.com)