This has become even more clear today, as security researcher Lukas Stefanko has revealed that 13 now-removed Android apps, downloaded by over 560,000 users, contained malware.
The hyper-popular social network Tumblr is now not being listed on the Apple App Store, after the tech giant discovered that Tumblr had failed to filter out sexual images of children on it's mobile app.
As 9to5 Mac noted, the issue may have something to do with inappropriate content that violated Apple's guidelines, which has led Apple to pull apps before. To fix the issue, some deleted the app and then tried to reinstall it.
According to the Verge, the app, which has been on the store for several years, was removed on November 16 and has remained off the store since.
In its statement, it said that all images uploaded to Tumblr pass through a database of "known child sexual abuse material".
It later explains that child porn content, which had not been previously flagged in the "industry database", was discovered by Tumblr officials during a "routine audit".
In October, WhatsApp announced in a blog post that it is adding support for third-party developers to build sticker apps for WhatsApp for both Android and iOS users. "As this is an industry-wide problem, we work collaboratively with our industry peers and partners like [the National Center for Missing and Exploited Children] (NCMEC) to actively monitor content uploaded to the platform", a Tumblr spokesperson tells Download.com in a statement. Soon after it was launched, both the operating system platforms had numerous third-party apps that would allow the users to get new stickers.