Publishing a mobile app is not like publishing a website; you cannot just push it live. Both Apple's App Store and Google Play review apps before they reach users, and a rejection can delay a launch by days or weeks. Understanding how review works turns it from a surprise into a manageable step.
App review evaluates whether an app meets the store's guidelines: that it works without crashing, that it does what it claims, that it handles user data and privacy properly, that it follows rules on payments and content, and that it does not mislead users. Apple's review is generally more hands-on and stricter; Google's has historically been faster but enforces its policies too. Both can reject an app that violates their rules.
Apps get rejected for predictable reasons: crashes and bugs found during review, incomplete information or broken features, privacy issues like missing disclosures or a required privacy policy, using non-compliant payment methods for digital goods, or thin apps that offer little value. Most rejections are avoidable with preparation, and each comes with feedback you can address and resubmit.
The way to protect a launch date is to build to the guidelines from the start, test thoroughly before submitting, prepare the required privacy and metadata carefully, and leave buffer in the timeline for a possible round of review feedback. Experienced teams plan for review rather than being caught off guard by it, which is how launches stay on schedule.
Plan for the gate, and it stops being a surprise.
This is general educational information about building software, not specific technical or business advice.