Application approval

Google places some restrictions on the types of apps that can be published, in particular not allowing sexually explicit content, child endangerment, violence, bullying & harassment, hate speech, gambling, illegal activities, and requiring precautions for user-generated content.

In March 2015, Google disclosed that over the past few months, it had been begun using a combination of automated tools and human reviewers to check apps for malware and terms of service violations before they are published in the Play Store. At the same time, it began rolling out a new age-based ratings system for apps and games, based on a given region's official ratings authority (for example, ESRB in the US).

In October 2016, Google announced a new detection and filtering system designed to provide "additional enhancements to protect the integrity of the store". The new system is aimed to detect and filter cases where developers have been attempting to "manipulate the placement of their apps through illegitimate means like fraudulent installs, fake reviews, and incentivized ratings".

In April 2019, Google announced changes to the store's app review process, stating that it would take several days to review app submissions from new and less-established developers. The company later clarified that, in exceptional cases, certain apps may be subject to an expanded review process, delaying publication by seven days or longer.

Application bans

Some mobile carriers can block users from installing certain apps. In March 2009, reports surfaced that several tethering apps were banned from the store. However, the apps were later restored, with a new ban preventing only T-Mobile subscribers from downloading the apps. Google released a statement:

On Monday, several applications that enable tethering were removed from the Android Market catalog because they were in violation of T-Mobile's terms of service in the US. Based on Android's Developer Distribution Agreement (section 7.2), we remove applications from the Android Market catalog that violate the terms of service of a carrier or manufacturer. We inadvertently unpublished the applications for all carriers, and today we have corrected the problem so that all Android Market users outside the T-Mobile US network will now have access to the applications. We have notified the affected developers.

In April 2011, Google removed the Grooveshark app from the store due to unspecified policy violations. CNET noted that the removal came "after some of the top music labels have accused the service of violating copyright law". TechCrunch wrote approximately two weeks later that Grooveshark had returned to Android, "albeit not through the official App Market", but rather "Playing on Android's ability to install third-party applications through the browser, Grooveshark has taken on the responsibility of distributing the application themselves".

In May 2011, Google banned the account of the developer of several video game emulators. Neither Google nor the developer publicly revealed the reason for the ban.

In March 2013, Google began to pull ad blocking apps from the Play Store, per section 4.4 of the developers' agreement, which prohibits apps that interfere with servers and services.

Apps that exempt themselves from power management policies introduced on Android Marshmallow without being "adversely affected" by them, are banned.

In July 2018, Google banned additional categories of apps, including those that perform cryptocurrency mining on-device, apps that "facilitate the sale of explosives, firearms, ammunition, or certain firearms accessories", are only used to present ads, contain adult content but are aimed towards children, "multiple apps with highly similar content and user experience," and "apps that are created by an automated tool, wizard service, or based on templates and submitted to Google Play by the operator of that service on behalf of other persons."