What Is ROAS?
ROAS (Return on Ad Spend) measures how much revenue you earn for every dollar spent on advertising. It is the primary metric for evaluating paid acquisition campaign performance in mobile apps.
ROAS = Revenue from Ad Campaign / Ad Spend x 100%
If you spend $10,000 on a campaign and it generates $30,000 in revenue, your ROAS is 300% (or 3x). For every dollar spent, you earned three dollars back.
ROAS is related to ROI but differs in scope. ROI accounts for all costs (including operational overhead), while ROAS focuses specifically on ad spend efficiency.
Day-N ROAS: The Mobile Standard
In mobile apps, revenue does not arrive all at once. A user acquired today might not make their first purchase until Day 7 or start a trial that converts on Day 14. This is why mobile marketers track Day-N ROAS:
- D0 ROAS: Revenue on install day / ad spend
- D1 ROAS: Cumulative revenue through Day 1 / ad spend
- D7 ROAS: Cumulative revenue through Day 7 / ad spend
- D14 ROAS: Cumulative revenue through Day 14 / ad spend
- D30 ROAS: Cumulative revenue through Day 30 / ad spend
D7 ROAS is the most commonly used checkpoint. It captures enough revenue signal to evaluate performance while being early enough for optimization decisions.
ROAS Benchmarks by Channel (2026)
| Channel | Target D7 ROAS | Target D30 ROAS |
|---|---|---|
| Apple Search Ads | 15-30% | 40-80% |
| Google App Campaigns | 10-25% | 35-70% |
| Meta (Facebook/Instagram) | 10-20% | 30-60% |
| TikTok Ads | 8-18% | 25-55% |
| Programmatic/DSPs | 5-15% | 20-45% |
These benchmarks vary by category and monetization model. Gaming apps often see higher D7 ROAS because IAP revenue starts quickly. Subscription apps may show low D7 ROAS because free trials delay conversion.
ROAS Targets and Break-Even
The minimum acceptable ROAS depends on your LTV curve. If users generate 40% of total LTV within 30 days, then a D30 ROAS of 40% signals eventual break-even.
In practice, most mobile marketers set targets based on historical cohort data:
- Analyze past cohorts to determine the ratio of D7 revenue to total LTV
- If D7 revenue is typically 20% of total LTV, then a D7 ROAS of 20% signals an eventually profitable campaign
- Set the D7 target at this threshold, with a safety margin
iROAS: Incremental ROAS
Standard ROAS does not tell you whether the ad spend actually caused the revenue. Some of those users might have installed organically anyway. Incremental ROAS (iROAS) measures the additional revenue generated by advertising beyond organic.
iROAS = (Revenue with Ads - Revenue without Ads) / Ad Spend
Measuring iROAS requires controlled experiments: geographic holdouts, randomized exposure groups, or time-based on/off tests.
ROAS by Monetization Model
Subscription Apps
Free trials delay revenue, making D7 ROAS often near zero. D30 or even D60 ROAS is a more meaningful evaluation checkpoint.
IAP/Gaming Apps
Faster revenue curves. Early purchasers make D0 and D1 ROAS meaningful, but heavy dependence on whale spending makes ROAS volatile across campaigns.
Ad-Monetized Apps
ROAS uses ad revenue (from AdMob, ironSource, etc.) rather than IAP. Predictable per-user revenue but lower per impression.
Optimizing ROAS
Creative Testing
Ad creative drives the biggest swings in ROAS. Test multiple formats (video, static, carousel, playable), different hooks in the first 2-3 seconds, and various value propositions. UGC-style content often outperforms polished studio creative.
Audience Optimization
Use lookalike audiences based on high-LTV users, not just installers. Exclude users who already have the app or recently churned. Broad targeting often wins with modern platform algorithms.
Bid Strategy
Start with target CPA or target ROAS bidding. Give campaigns at least 50-100 conversions before evaluating. Do not make changes more than once every 3-5 days to allow algorithm learning.
Post-Install Optimization
ROAS is not just about cheap installs. Optimize in-app onboarding to accelerate time-to-first-purchase. Test different trial lengths and paywall placements to maximize conversion.
Attribution Challenges
Post-ATT, measuring ROAS on iOS has become harder. In 2026, marketers combine SKAdNetwork 4.0 with coarse and fine-grained conversion values, probabilistic modeling, self-reported attribution surveys, and incrementality testing to build a complete picture.