Organic installs are app installs that came without direct paid advertising. The major organic sources:
The median measurable iOS app sources 61.5% of installs organically, with App Store keyword search alone (the pure-ASO signal) contributing 51.9% of total installs. That's higher than most operators assume, and the headline reason ASO compounds: every paid install you make also lifts your search-rank position, which then drives more organic installs. The split varies dramatically by category — Games sit at 40% organic, every non-game parent category clusters between 66-72%.
- App Store search — user searched a keyword, found your app, installed. Largely driven by ASO (keywords, title, subtitle).
- App Store browse — user browsed top charts, featured collections, category lists, similar-app suggestions. Driven by ranking and editorial placement.
- Web referrals — user clicked a link from search engines, social media, friend share, blog, etc. Often involves deep linking to translate web intent into app install.
- Brand search — user searched your specific brand name. Mix of direct demand (from prior awareness) and Apple Search Ads competitor bids on your brand.
- Word-of-mouth and referrals — friend told them about the app, in-app referral program, social sharing.
Organic share varies wildly
- Utility apps: 60-80% organic (often found via search for specific tasks).
- Subscription consumer apps: 30-50% organic.
- Hyper-casual games: 10-25% organic (paid UA dominates).
- Mid-core / mature gaming brands: 25-50% organic (brand-driven awareness).
- Social / messaging at scale: 40-70% organic (network effects + word-of-mouth).
Organic uplift from paid UA: a healthy paid UA program generates more than just paid installs. The ads themselves create awareness; users who see ads but don't install immediately may install organically days or weeks later (via brand search, App Store search, friend recommendation). The phenomenon is called "organic uplift" and typically runs $0.20-0.50 of incremental organic installs per $1 of paid spend. This makes paid UA more efficient than pure attribution suggests — and means cutting paid UA also reduces organic.
Measuring organic precisely is hard
- Some "organic" installs are actually paid (post-ATT iOS, SKAN suppresses small-cohort signals; some installs end up unattributed).
- Some "paid" installs are actually organic (the user would have installed anyway from organic channels; the ad happened to be there).
- Incrementality testing (holdout experiments) is the more rigorous way to measure true paid-vs-organic — see [[incrementality]] for the playbook.
Organic install channels — what each contributes
| Channel | Volume potential | Optimization lever |
|---|---|---|
| App Store / Play Store search | High for keyword-targeted apps | ASO — title / subtitle / keyword field / description |
| Browse / featured / charts | High for ranked apps | Chart position, editorial features, ASO icon + screenshots |
| Web → Store referrals | Medium | SEO blog content, landing pages, deferred deep linking |
| Brand search (direct intent) | Medium-high | Brand campaigns, PR, content marketing |
| Word-of-mouth + referrals | High for viral products | Referral program, network effects, share mechanics |
| Cross-promotion (own apps) | Medium for multi-app publishers | Cross-app banners, account linking, bundled offers |
| Editorial (Today tab, Editor's Choice) | Spikes when featured | App quality + Apple / Google editorial relationships |
Organic share varies wildly by category (10-25% for hyper-casual games, 60-80% for utilities, 40-70% for messaging at scale). Most apps under-invest in ASO and over-invest in paid UA relative to long-term unit economics — organic installs have zero marginal cost and compound.
The distribution skews right — most catalog apps are 60%+ organic. The "<20% organic" bucket is small (~1,100 apps) and dominated by aggressive paid-UA gaming. The "75-90% organic" tier is the dense modal bucket — typical utility apps, productivity tools, content apps that monetize via subscriptions or ads but acquire mostly via ASO + brand. The 90%+ tail is small because some paid activity is almost always present (Apple Search Ads on brand terms, retargeting).
Organic-install share by category (US iOS, MWM)
| Category | Median organic share | Median organic-search share |
|---|---|---|
| Social & Communication | 71.5% | 64.7% |
| Productivity & Tools | 68.8% | 63.3% |
| Media & Entertainment | 66.7% | 59.3% |
| Lifestyle & Well-being | 66.7% | 62.0% |
| Education & Knowledge | 66.4% | 61.3% |
| Game | 39.5% | 25.7% |
The category split confirms what UA teams already feel but rarely measure precisely: Games are paid-UA-dependent (40% organic median), while every other parent category sources 66-72% of installs organically. The implication for non-game apps: invest in ASO infrastructure, because the median app earns about 1 install via search for every 2 installs total.