What Are App Open Ads?
App open ads are full-screen ad units that display when a user opens your app or returns to it from the background. They occupy the transition moment between launching the app and reaching the main content. Unlike interstitials that interrupt mid-session, app open ads leverage a natural pause point: the user is already waiting for the app to load, so a brief ad feels less intrusive. Google introduced the app open ad format through AdMob specifically for this use case. The ad includes a small branding header that shows your app icon and name.
eCPM Benchmarks: What to Expect
App open ads command premium eCPMs because they are full-screen, high-attention placements. Here are typical ranges across market tiers:
- Tier 1 (US, UK, CA, AU, DE): $8–$20 eCPM
- Tier 2 (FR, IT, ES, JP, KR, BR): $4–$12 eCPM
- Tier 3 (IN, ID, PH, VN, TH): $1–$5 eCPM
These numbers vary significantly by app category, user demographics, and time of year. Gaming apps tend to see the higher end of these ranges. The important comparison is against other full-screen formats. App open ad eCPMs generally run 10–20% below standard interstitials in the same geography, but the incremental nature of the format makes this acceptable.
Implementation: Cold Start vs. Warm Return
Cold Start (First Launch)
When a user opens your app from a fully closed state, the app goes through its initialization process. This is the most natural moment for an app open ad because the user expects a brief loading period. Key considerations:
- Preload the app open ad during the splash screen or initialization phase
- Show the ad only after it is fully loaded to avoid blank screens or partial renders
- Set a maximum load time of 3–4 seconds. If the ad has not loaded by then, skip it
- Do not show an app open ad on the very first launch after install
Warm Return (Foreground from Background)
When a user switches back to your app after it has been in the background, another opportunity arises. This is where frequency capping becomes critical:
- Track the time elapsed since the app went to the background
- Only show an app open ad if the app was backgrounded for at least 3–5 minutes
- Never show an app open ad if the user is returning from a deep link, push notification, or share intent
Frequency Capping: The Critical Setting
Frequency capping is the single most important configuration decision for app open ads. Get it wrong and you will see retention drops. Get it right and the revenue flows without user complaints.
- Conservative (recommended start): Maximum 1 app open ad per 5 minutes, maximum 3 per day
- Moderate: Maximum 1 per 3 minutes, maximum 5 per day
- Aggressive (not recommended): Maximum 1 per 1 minute, no daily cap
Start conservative and monitor your retention metrics for two weeks before loosening caps. If day-1 retention drops by more than 1–2 percentage points after enabling app open ads, your frequency is too aggressive.
User Experience Considerations
- Loading indicator: Show your app's normal splash screen behind the ad
- Skip timing: App open ads include a built-in countdown (typically 5 seconds). Do not add your own additional delay.
- Orientation: Ensure the app open ad matches your app's orientation
- Audio: App open ads should not auto-play audio
Revenue Potential: Realistic ARPDAU Impact
App open ads are not a replacement for your core ad strategy. They are an incremental layer. Based on typical implementation across apps with 10,000+ DAU:
- ARPDAU: $0.01–$0.03
- 100K DAU: $1,000–$3,000/day ($30,000–$90,000/month)
When NOT to Use App Open Ads
- Subscription apps with a paid tier: If users are paying for an ad-free experience, showing ads at launch undermines trust
- Apps with critical time-sensitive functions: Alarm clock apps, emergency tools, or navigation apps where the user needs immediate access
- Onboarding flows: Never show app open ads during the first session or account setup
- Very short session apps: If your average session length is under 30 seconds, an app open ad feels oppressive
Combining with Other Formats
- App open + banner: Safe combination. The app open ad plays at launch; banners display during the session. No overlap.
- App open + interstitial: Works well, but add a cooldown. If an app open ad was shown, delay the first interstitial by at least 60 seconds.
- App open + rewarded: Ideal combination. App open ads are passive (shown automatically), while rewarded ads are user-initiated.
- App open + native: No conflict. Native ads appear in-content while app open ads appear at launch.
App open ads represent one of the cleanest incremental revenue opportunities available to mobile publishers. They monetize a moment that was previously dead time, and when frequency-capped properly, they have minimal impact on retention and user satisfaction.
RevenueFlex integrates app open ads into publishers' GAM waterfall configurations alongside other placements to maximize total ARPDAU.