An app does not appear in a store the moment its developer uploads it. It enters a review pipeline with automated and human stages, each looking for different classes of problem.
Automated analysis comes first
Uploaded builds are scanned before any person looks at them. Tools inspect the binary for known malicious patterns, prohibited system calls and undeclared use of sensitive interfaces.
Metadata is examined too, including declared permissions, age rating answers and privacy disclosures, which are compared against what the code appears to do.
Mismatches at this stage are the most common cause of an immediate rejection, and they are usually mechanical rather than editorial.
Human reviewers apply written guidelines
Reviewers install the app and use it, checking against published rules covering functionality, content, business model and design.
Much of the work is verifying claims. If an app advertises a feature, the reviewer looks for it, and a build with a broken or unreachable feature is rejected as incomplete.
Accounts create a recurring obstacle, since an app behind a login must be supplied with working credentials or the reviewer cannot see the product at all.
Payment rules attract the most disputes
Store guidelines govern how digital goods are sold, generally requiring that content consumed within an app be purchased through the store's payment system.
Physical goods and services delivered outside the app fall under different treatment, which is why a ride-hailing app and a subscription reader are handled differently.
The boundary between those categories is where interpretation enters, and it is the source of most public disagreements between developers and platforms.
Updates are reviewed but not identically
Subsequent versions go through review again, though established apps with clean histories often move faster because risk scoring accounts for prior submissions.
Changes that touch permissions, payments or age rating tend to reset that advantage and receive closer attention.
Expedited review exists for urgent fixes, and it is rationed, since a queue that everyone can skip is not a queue.
Rejection is a conversation, not a verdict
A rejection names the guideline at issue and usually describes what the reviewer observed, which is the starting point for a resolution.
Developers can respond in the review system or request escalation to a board that considers whether a guideline was applied correctly.
Because the rules are published and revised over time, an app rejected under one version of the guidelines may be acceptable under a later one.