A lot of first time app owners assume that once development is finished, the app just goes live. In reality, both Apple's App Store and Google's Play Store review every submission, and getting rejected the first time around is common enough that it shouldn't come as a surprise. Here's what that process actually involves.
An example of how it plays out
Say you've built a delivery tracking app. You submit it to Apple on a Monday. By Wednesday, you get a rejection, not because anything is broken, but because your account deletion option is buried three screens deep instead of being easy to find, which is one of Apple's specific requirements. You fix it, resubmit, and it's approved two days later. That's a completely normal first submission experience, not a sign anything went wrong.
Apple's review tends to be stricter
Apple has a human reviewer actually test your app, not just an automated scan, and they check things like whether your app crashes, whether it does what your app store listing claims, whether login and account deletion are handled properly, and whether the design meets their interface guidelines. Reviews typically take one to three days, but a rejection means fixing the issue and going through the queue again, which is why building in review time matters when planning a launch date.
Google's process is different, not necessarily easier
Play Store approval is often faster for a first submission, sometimes just a few hours, because more of it is automated. But Google has become stricter over time about specific things like how you request sensitive permissions, such as access to contacts or location, and about data privacy disclosures. Getting flagged for an unclear privacy policy or an unnecessary permission request is a common first time issue.
The requirements that catch people most often
A working privacy policy link, accurate and specific descriptions of why you need each permission you request, a functioning account deletion path if users can create accounts, and screenshots that actually reflect what the app looks like. None of these are complicated on their own, but missing even one is enough to trigger a rejection and add days to your timeline.
How to avoid losing time to this
Build submission requirements into your planning from the start, not as an afterthought once development wraps up. A developer who's shipped apps before will usually know the common rejection triggers and build around them proactively. If you're planning a launch date tied to an event or campaign, build in at least a week of buffer for the review and resubmission cycle, so a first rejection doesn't put your launch date at risk.