1. 无分级的应用在 Google Play 上根本不允许上架。内容分级政策原文："All apps must have a content rating from the IARC to be on Google Play. You must accurately complete the Play Console questionnaire for every app, and keep it updated if content in the app changes." 政策同时写明："We don't allow apps without a content rating on Google Play." 以及 "Apps without a content rating will be removed from the Play Store."（https://support.google.com/googleplay/android-developer/answer/9898843）
2. 问卷在哪里填、流程怎么走。"Open Google Play Console and go to the App content page (Policy > App content). Review the information about the questionnaire and enter your email address. Your email address will be used for correspondence with International Age Rating Coalition (IARC). Select a category and click Next." 中间可以随时保存草稿继续——"Each app can have one draft questionnaire at a time"；提交前 Summary 页会先给出计算出的分级，确认无误再点 Submit。（https://support.google.com/googleplay/android-developer/answer/9859655）
3. 问卷并非只在首次提交时必填，而是三种情形都要填："You need to complete the content rating questionnaire for both your new and existing apps, including: New apps submitted to Google Play Console; Existing apps that are active on Google Play but lack a rating; All app updates where there has been a change to your content or features that would affect the responses to the questionnaire."（https://support.google.com/googleplay/android-developer/answer/9859655）
4. 虚假申报是政策违规，不是走个过场。"Misrepresentation of your app's content may result in its removal or suspension, so it is important to provide accurate responses to the content rating questionnaire." 帮助文档进一步说明："App updates and submissions can be rejected for misrepresenting an app's content."（https://support.google.com/googleplay/android-developer/answer/9859655）
5. 一份问卷、多个彼此独立的评级机构——所以同一个应用在不同地区可能拿到不同分级。"Your app's content ratings are assigned by separate rating authorities and determined by your questionnaire responses. Because they are independent third parties, each rating authority uses its own methodology to assign ratings." 因此 "Your app can earn different ratings in different territories because rating standards can have differences by territory." 机构还可推翻计算结果："Rating authorities participating in IARC may change your app's rating after a review. If a rating authority overrides your app rating and you want to update your responses, you'll need to complete the questionnaire again." 如果你自己发现计算结果已不符合当前内容，可在 Content rating 页面点 "Start new questionnaire" 重填。（https://support.google.com/googleplay/android-developer/answer/9859655）
6. 分级到底决定什么。内容分级用于 "help filter or block your content in certain territories or to specific users where required by law, and determine your app's eligibility for special developer programs." 在欧洲经济区、澳大利亚、巴西、新加坡、瑞士和英国，对被判定为未成年的用户，成熟内容（18+ 分级应用或游戏）会被禁止获取与购买，成熟内容也会被从 Play 搜索与浏览页过滤（仅深度链接除外）。（https://support.google.com/googleplay/android-developer/answer/9859655）
7. 广告不计入你的分级，但受分级约束。"The content rating assigned to your app is specific to the content within your app. It does not include other features and practices, such as consumer agreements or ads." 但 "any ads that appear in the app must not be significantly more mature in content than the primary content within the app itself"——必须设置广告过滤，让投放内容与你的分级匹配（AdMob 用 blocking controls 与广告内容分级）。（https://support.google.com/googleplay/android-developer/answer/9898843 / https://support.google.com/googleplay/android-developer/answer/9859655）
8. 功能变更后要主动重填问卷，而不是等到收到警告邮件。政策原文："If you make changes to your app content or features that affect the responses to the rating questionnaire, you must submit a new content rating questionnaire in the Play Console."现实中的高频触发点：加入用户生成内容或社交互动、引入新的内容类别、新增交互或购买类功能、广告可展示的内容发生变化。（https://support.google.com/googleplay/android-developer/answer/9898843）
9. 不认同被指派的分级？向评级机构申诉，而不是找 Google Play 客服："If you object to the rating assigned to your app by a participating IARC rating authority, you have the right to appeal directly using the link provided in your certificate email." 与申诉无关的 IARC 问题则通过其官网联系（https://www.globalratings.com/）。（https://support.google.com/googleplay/android-developer/answer/9859655）