Apple emailed Parler CEO John Matze saying that "Parler is not effectively moderating and removing content that encourages illegal activity", BuzzFeed News reported.
Messages of support for Wednesday's attack in Washington DC - along with calls for new demonstrations - had flourished on the platform, leading Google to remove it from its app store on Friday, followed by Apple on Saturday.
But it now attracts many more traditional Republican voices.
Public safety issues will need to be resolved before it is restored, Apple said. A group of rioters and a minority of protesters waving American and Trump flags illegally stormed the Capitol building as lawmakers were counting electoral votes in a joint session of Congress.
In suspending the service, Google, whose software powers Android phones, cited its policy against apps that promote violence and gave recent examples from Parler, including a Friday post that began "How do we take back our country?" Apple said in an email, "Parler shall be responsible for all user-generated content on the service and responsible for ensuring that this content meets the App Store's guidelines for user safety and protection". While there is no flawless system to prevent all risky or hateful user content, apps are required to have robust content moderation plans in place to proactively and effectively address these issues.
Thank you for your response regarding unsafe and harmful content on Parler.
Apple said in the letter: "Content that threatens the well-being of others or is meant to incite violence or other lawless acts has never been acceptable on the App Store".
If Apple pulls Parler from the App Store, people would not be able to download the app to their iPhones or iPads.
"We will try our best to move to a new provider right now as we have many competing for our business, however Amazon, Google, and Apple purposefully did this as a coordinated effort knowing our options would be limited and knowing this would inflict the most damage right as President Trump was banned from the tech companies". The insurrection left five people dead, over 50 police officers injured, and more than a dozen facing federal charges, in addition to the growing number of arrests emerging as suspects are identified. There have been many criticisms and complaints about it. Parler continues to use it to plan and promote illegal and risky activities, "he said in an email".
After the U.S. presidential election in November, Trump supporters flocked to alternative social networks, including Parler, to plan election protests after Facebook and other sites banned groups that pushed debunked conspiracy theories.
Matze has characterized the decision as "an attempt to completely remove free speech off the internet". From November 3 to 9, Parler was downloaded about 530,000 times in the U.S., according to data from Apptopia.
As a result, services like Facebook, Twitch, and Shopify quickly blocked President Trump's account indefinitely ...