Growing a mobile game is no longer just about getting players who make purchases quickly. Today, success depends on attracting players who stay longer, keep playing, and continue spending over time. These players generate a higher Lifetime Value (LTV), making them much more valuable for game developers.
To help advertisers find these long-term players, Unity Ads, powered by Unity Vector, has introduced the D28 IAP ROAS optimizer. This new feature works alongside the existing D7 IAP ROAS optimizer, giving developers more ways to optimize their user acquisition (UA) campaigns.
Instead of replacing D7 campaigns, the D28 optimizer is designed to complement them. Each campaign focuses on a different type of player, and together they can improve overall campaign performance.
Quick Summary
D7 and D28 campaigns target different groups of players.
D7 campaigns focus on players who make purchases during their first week.
D28 campaigns target players who may spend later but often become more valuable over time.
Unity Vector uses gameplay data to optimize both campaign types without making them compete against each other.
Running both campaigns together delivers the best long-term results.
Understanding D7 and D28 IAP ROAS Campaigns
IAP ROAS (In-App Purchase Return on Ad Spend) optimization uses machine learning to identify players who are most likely to make purchases in your game. Based on these predictions, the system automatically adjusts bids to achieve your desired return on advertising spend.
The difference between D7 and D28 is the period used for optimization.
D7 predicts player spending within the first 7 days after installing the game.
D28 predicts spending across the first 28 days after installation.
Both approaches have advantages, but neither is perfect on its own.
D7 vs D28 Comparison
D7 IAP ROAS
Optimization Period
Days 1–7 after install
Best For
Games where players usually make purchases quickly.
Games with strong early monetization.
Advantages
Faster campaign learning.
Quick performance feedback.
Earlier revenue generation.
Faster campaign scaling.
Limitations
Doesn't capture players who spend later.
May underestimate a player's true lifetime value.
D28 IAP ROAS
Optimization Period
Days 1–28 after install
Best For
Games where players spend gradually over several weeks.
Titles with strong retention and long-term engagement.
Advantages
Captures long-term spending behavior.
More accurate Lifetime Value predictions.
Finds players who become high-value customers later.
Limitations
Learning takes longer.
Early campaign results appear more slowly.
Why You Should Use Both Campaign Types
Many advertisers assume they must choose between D7 and D28 campaigns. In reality, they work best together.
D7 campaigns help advertisers identify early spenders and provide quick performance signals. This allows campaigns to scale faster and generate early revenue.
D28 campaigns focus on players who may not spend immediately but often become some of the highest-value users over time.
By combining the two optimization windows, advertisers can maximize revenue throughout the player's entire lifecycle rather than focusing only on the first week.
Will D7 and D28 Compete Against Each Other?
A common concern is whether both campaign types will bid for the same users, increasing advertising costs.
Unity's research shows this isn't the case.
Only 38% of players who make an in-app purchase within 28 days actually spend during their first week.
This means nearly 62% of valuable D28 players show no purchasing activity in the first seven days. These users represent a completely different audience with different playing habits and purchasing behavior.
Because these player groups are different, D7 and D28 campaigns target separate audiences rather than competing for the same users.
How Unity Vector Makes This Possible
Unity Vector helps both campaign types work together effectively.
Unlike traditional optimization systems that only analyze purchase data after a player installs the game, Unity Vector uses a much broader understanding of player behavior.
Since Unity supports both game development and advertising, it has access to valuable gameplay insights across many games.
Unity Vector combines:
Player behavior patterns
Game engagement data
Cross-game activity
Group-level player insights
Historical conversion trends
Using this information, Unity Vector predicts which players are likely to become valuable before an ad bid is placed.
This allows D7 and D28 campaigns to target different player segments without competing against each other.
The Future of ROAS Optimization
As user acquisition becomes more competitive, relying only on early spenders is no longer enough.
If advertisers focus only on D7 optimization, they risk missing a large percentage of valuable players who spend later. On the other hand, relying only on D28 campaigns means losing the fast learning and early revenue signals provided by D7.
Using both campaigns together creates a balanced strategy.
Unity Vector continuously improves its predictions by learning from player behavior and game performance. As games evolve and player habits change, its machine learning models become more accurate, helping advertisers identify valuable users over longer periods.
This approach allows game studios to build stronger user acquisition campaigns, improve profitability, and create sustainable long-term growth.
Conclusion
The introduction of the D28 IAP ROAS optimizer doesn't replace D7 campaigns—it strengthens them.
D7 campaigns are excellent for capturing early spenders, generating quick feedback, and accelerating campaign growth. D28 campaigns focus on long-term players who often deliver greater lifetime value.
Together, they provide complete coverage of the player journey. Powered by Unity Vector's advanced machine learning and player intelligence, these two optimization windows help advertisers reach more valuable users, improve return on ad spend, and build successful, long-lasting mobile games.
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