If you're shipping to both stores and using one ASO playbook, you're leaving installs on the table on at least one of them. Apple App Store and Google Play look similar from the outside (an icon, a title, screenshots, a description), but the algorithms underneath, the metadata fields they index, and the user behaviors they reward are meaningfully different. A title that ranks on Google Play might do nothing on the App Store. A keyword field that wins on iOS doesn't even exist on Android. The differences aren't huge, but they're enough that ignoring them costs you real downloads.
I've spent a lot of time inside both consoles and the patterns are clear. Here's what actually matters in 2026, broken into the differences that move installs.
1. Where keywords live (and how the algorithms find them)
This is the biggest, most fundamental difference and it shapes basically everything else.
Google Play indexes your full description. Every word in your title, short description, and full description is fair game for the search algorithm. It treats your listing more like a webpage and uses density, position, and context to rank you. That's why writing Google Play descriptions that convert is also a keyword exercise. You're optimizing for both humans and the algorithm at the same time.
Apple App Store has a hidden keyword field. iOS gives you a 100-character keyword field that users never see, and that's where most of the search ranking weight lives. Your description is for humans and basically ignored by the algorithm. So on iOS, your description should be pure marketing copy with no SEO contortions, while your keyword field needs to be packed surgically with comma-separated, single-word terms (no spaces after commas, no plurals when the singular is already there, no repeating words from your title or subtitle).
This one difference means the entire keyword strategy is different. On Google Play, you're writing keyword-rich descriptions. On the App Store, you're writing better marketing copy and treating the keyword field like a separate piece of metadata work.
2. Title length and what to put in it
Both stores give you a title field, but the rules and the leverage are different.
Google Play: 30 characters. Title carries heavy weight in search ranking. Most successful Play Store titles use the format "Brand Name: Primary Keyword" because the algorithm rewards keyword presence in the title heavily. If your brand is "IOn Sleep" and your category is "white noise app for sleep," you want both in 30 characters or close to it.
Apple App Store: 30 characters for title plus 30 characters for subtitle. Apple treats the subtitle as a high-weight keyword location too. So you effectively get 60 characters of high-priority text. Use the title for brand plus your single strongest keyword and the subtitle for two or three secondary keywords woven into a real sentence. Apple cares about readability more than Google does. A subtitle that reads like keyword soup ("sleep sounds white noise binaural") gets soft-rejected during review way more often than a clean one ("Sleep sounds and binaural beats").
3. Visual assets and how they're judged
Both stores need an icon, screenshots, and a feature graphic or video, but how users (and reviewers) interact with them is different.
Google Play autoplays your video and rewards motion. If you upload a feature video, it autoplays muted at the top of your listing. Most users see the video before they see your screenshots. That means your video has to communicate the core value in the first 2-3 seconds or users scroll past. Long intro animations are death. Captioned text on the video matters because most viewers have sound off. And A/B testing the video itself can move conversion 5-15% by itself.
Apple App Store screenshots have to be stunning to convert. Apple displays your first three screenshots above the fold. If those three don't sell the app, users tap away before scrolling. The convention on iOS is heavily designed screenshots with clear text overlays explaining the feature, often in a clean white or branded background, not raw phone screen captures. App Store reviewers also check whether your screenshots accurately represent the app's actual UI. Stylized screenshots are fine, fake features are a fast rejection.
For a deeper dive on this side, the post on Play Store screenshots without Figma covers the workflow that works for both stores when you're not a designer.
4. Reviews and ratings (and how much they matter)
Both stores rank in part by review quantity and rating, but the weight and recency rules differ.
Google Play weights recent reviews heavily. A burst of 4 and 5 star reviews in the last 30 days can move your ranking noticeably. A burst of 1 stars can sink it. Google's algorithm pays more attention to the slope of your rating trend than the lifetime average. That's why getting more app reviews on Google Play is an ongoing operational task, not a one-time push.
Apple App Store weights overall rating more than recency. Once you're past about 100 reviews, the lifetime average becomes a stable signal that's hard to move. New reviews still matter for category ranking but the weight is less dramatic than Google. Apple also lets you reset your rating when you ship a new version, which can be a useful lever if you've fixed a problem and have a real product upgrade behind it.
5. Updates and ranking velocity
Google Play rewards frequent updates. An app that ships an update every 2-4 weeks signals quality and active maintenance to the algorithm. Conversion rate also tends to bump after each update because the "recently updated" signal shows on the listing. Most successful Play Store apps ship something monthly even if it's a small fix.
Apple App Store doesn't reward updates the same way. Frequent updates don't move ranking, and rapid ship cadence can actually slow you down because every update goes through Apple review (24-48 hours typically, sometimes longer). On iOS, batch your improvements and ship deliberate, larger updates rather than rapid small ones.
6. Localization and how each store handles it
Google Play translates your description but only indexes localized text in countries where you've localized. If you only have English metadata, you can still rank in non-English markets but with much weaker signal. Localizing your title, short description, and full description into the top 5-10 languages for your category typically lifts non-US installs 30-100% within a few months.
For the step-by-step on doing this well (and the mistakes that waste the effort), see app store localization.
Apple App Store treats each localization as a separate listing for ranking purposes. Your iOS keyword field can be different per language too. Smart developers exploit this by localizing into "spillover" languages (English UK in addition to English US, Mexican Spanish in addition to LatAm Spanish) and using slightly different keywords in each, effectively doubling their searchable keyword surface. This trick doesn't work the same way on Android.
7. Experimentation and testing
Google Play has built-in store listing experiments. Free, statistically rigorous A/B testing on real users. You can test icon, screenshots, short description, video, and full description independently. Most indie developers underuse this. The post on Play Store listing experiments walks through how to run them properly. If you're not running a test right now, you're missing the highest-leverage tool in the toolbox.
Apple's Product Page Optimization launched on iOS but is more limited. You can test up to three variants of your screenshots, icon, and app preview, but only one element type at a time per test, and the traffic split is more constrained. Useful, but the Google Play experiments tool is significantly more flexible. On iOS, you have to be more deliberate about what you test because each round costs more time relative to the result you'll get.
How to optimize for both stores without doubling your work
You don't have to run two completely separate ASO programs. The trick is identifying what's shared, what's per-store, and what's per-store per-language. A simple framework.
Shared across both stores
Your icon, your visual style, your keyword research starting point, your value proposition, and your category positioning. Do this work once. Most of the high-level audience and message work translates across both stores even if the metadata fields differ.
Per store
Your title format, your description (Google Play needs keywords, App Store needs marketing copy), your screenshots (similar style but different aspect ratios and ordering rules), and your video (Google Play autoplays, App Store doesn't always). Allocate time per store accordingly.
Per store per language
Your keyword field (iOS) and your localized description (Google Play). This is where the heaviest per-market work lives, and it's worth doing for at least the top 5 markets you care about.
Where IOn Emit fits
The current version of IOn Emit focuses on Google Play, with a 100-point ASO scoring system that grades your listing across visual assets, metadata, keywords, and conversion signals. The keyword research, description writing, and screenshot preview tools all map to the Play Store conventions covered above. If you want the deep dive on the Google Play side, our complete Google Play ASO guide walks through every ranking factor in detail, and the Google Play search algorithm breakdown explains how the indexing actually works under the hood.
For Apple App Store optimization, the workflow is parallel but the inputs change. The keyword work moves into the hidden keyword field. The description shifts to pure marketing copy. The visual asset hierarchy reorders. If you're shipping to both stores, build your iOS metadata in parallel using the same keyword research starting point, then split the actual implementation per store. The post on IOn Emit for Apple App Store and Android developers covers the cross-store workflow in more depth.
If you're starting fresh and trying to figure out where to begin, our guide for the first 1000 downloads as an indie developer walks through the launch sequence on both stores. And if you're early in the journey, the keyword research workflow works as the foundation for both stores even though the implementation differs.
The bottom line
Apple App Store and Google Play ASO share a starting point and diverge fast. Keyword fields are different, title weights are different, review timing is different, update cadence is different, and the experimentation tooling is different. Don't paste your Play Store metadata into App Store Connect and call it done. Build the iOS-specific keyword field carefully, write a marketing-first description, design screenshots for the above-the-fold view, and ship updates deliberately.
If you're using both stores, the work is roughly 1.4x rather than 2x once you've nailed the shared pieces. The differences are real but the foundation is the same. Get your value proposition, keyword research, and visual style right once. Then localize per store from there.