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App Store Optimization (ASO): The Complete Guide

App Store Optimization Is SEO for Mobile Apps

Every day, thousands of Canadians search for apps on the App Store and Google Play. The majority of downloads start with a search. Yet most app developers and publishers treat ASO as an afterthought.

App Store Optimization (ASO) is the discipline that optimizes your app's visibility and conversion rate in the stores. It is the equivalent of SEO, but for app stores. And in the Canadian market, ASO competition from local agencies is practically nonexistent.

At Growth Lab, we have helped companies generate over $10M in client revenue by combining paid and organic acquisition. Here is the complete guide to mastering ASO.

The Two Pillars of ASO

ASO breaks down into two categories:

  • On-metadata ASO: elements you control directly (title, description, keywords, screenshots)
  • Off-metadata ASO: external signals (ratings, reviews, download volume, retention)
Both matter. But start with on-metadata -- that is where you have immediate control.

Title and Subtitle Optimization

iOS (App Store)

  • Title: 30 characters maximum. Include your primary keyword
  • Subtitle: 30 characters. Use it for a key benefit or secondary keyword
Example for a fitness app: Title: "FitPro - Home Workouts" / Subtitle: "Custom plans & tracking"

Android (Google Play)

  • Title: 30 characters maximum
  • Short description: 80 characters. This is your pitch. Include keywords and a clear benefit
On Google Play, keywords in the long description also count toward ranking, unlike iOS.

Common Mistakes

  • Using only the brand name without a descriptive keyword
  • Adding special characters that contribute nothing to discoverability
  • Ignoring the French version of the listing for the Quebec market

ASO Keyword Research

The iOS Keyword Field

Apple gives you 100 characters in the "Keywords" field (invisible to users). Maximize every character:

  • Separate words with commas, no spaces
  • Do not include your app name (already indexed)
  • Do not include "app" or "application" (Apple adds it automatically)
  • Use singular words (Apple handles plurals)
  • Include keywords in both English and French for the Canadian market

Keyword Research Tools

  • App Radar: keyword research with estimated search volumes
  • Sensor Tower: competitive analysis and ranking tracking
  • AppTweak: detailed data by country and language
  • Google Play Console: real search data for Android

Strategy for Canada's Bilingual Market

Canada is unique: your listings must be optimized in both French and English. On iOS, you can localize for "French (Canada)" in addition to "English (Canada)." Leverage both. Most of your competitors do not.

Screenshots and Preview Videos

Screenshots Sell Your App

Screenshots are the number one conversion factor on listing pages. Here are the best practices:

  • The first 3 screenshots are critical: they are the only ones visible without scrolling
  • Show benefits, not features: "Lose 10 lbs in 8 weeks" vs "Calorie tracking"
  • Add text overlays on each screenshot: screenshots without context convert 20-30% worse
  • Use contrasting colours: stand out in search results

Preview Video

  • iOS: 15-30 seconds, autoplay without sound in search results
  • Google Play: up to 30 seconds, hosted on YouTube
A good preview video shows the core app flow in action. Not a marketing montage. Users want to see what the actual experience looks like.

Ratings and Reviews Strategy

Why Reviews Matter So Much

Ratings and reviews influence:

  • Search ranking (directly)
  • Listing conversion rate (indirectly)
  • User trust before downloading
An app with 4.5 stars converts 2-3x better than an app with 3.5 stars, at equal visibility.

How to Get More Positive Reviews

  • Ask at the right moment: after a positive action (completing a level, achieving a first result)
  • Use SKStoreReviewController on iOS: Apple enforces a maximum of 3 prompts per year per user
  • Respond to every negative review: developers who respond to criticism increase their average rating by 0.3-0.7 points
  • Never buy reviews: Apple and Google detect and penalize this

A/B Testing in the Stores

Google Play Experiments

Google Play offers native A/B testing for:

  • The icon
  • Screenshots
  • Short description
  • Feature graphic
Use them systematically. Each test can improve your install rate by 5-20%.

Apple Product Page Optimization

Apple now allows testing up to 3 variants of your product page. You can test:

  • Screenshots
  • Preview video
  • App icon
Results are available in App Store Connect with statistical data.

Technical ASO: The Details That Matter

  • App size: apps over 200 MB require Wi-Fi for download on iOS. This kills impulse conversions
  • Update frequency: regularly updated apps are favoured in rankings
  • Category selection: choosing the right primary and secondary category impacts discoverability
  • Deep links: configure Universal Links (iOS) and App Links (Android) to direct web traffic into your app

ASO Is a Competitive Advantage in Canada

The Canadian ASO market is underexploited, especially for French-language listings. Local agencies do not offer this service seriously, which creates a massive opportunity for app publishers who invest in it now.

Launching or optimizing a mobile app? Growth Lab is one of the few Canadian agencies offering a complete, bilingual, data-driven ASO service. Book a free audit and we will analyze your app's organic growth potential.

Book a Free Audit
App Store Optimization (ASO): The Complete Guide – Growth Lab