Most app monetization advice is wrong for one simple reason. It forces you to choose.

In-app purchases or ads. Subscription or free.

But the apps making the most money aren’t choosing. They’re doing both and more.

If you look at the highest-grossing apps today, they don’t rely on a single revenue stream. They monetize different users in different ways, based on how those users behave. This isn’t theory. It’s how the model actually works.

In this article, we’ll break down when in-app purchases work, when ads make more sense, and why combining both is usually the better move.

Understanding In-App Purchases (IAP)

In-app purchases are simple. Users pay for specific value inside your app. That value could be functional, experiential, or convenience-driven, but it has to be clear.

Typical IAP use cases include:

Extra lives or boosters in games
Unlocking premium features
Removing ads
Cosmetic upgrades
Additional levels or content
Subscription access

The important thing to understand is this. You are not trying to monetize everyone. You are trying to monetize the right users.

In most apps, 95% of users will never pay. A small segment, usually between 1% and 5%, drives the majority of revenue. That’s not a flaw in the model. That’s how it’s designed to work.

What matters is whether your product gives those users a strong enough reason to spend more over time.

IAP works best when users are already invested. That usually happens in:

Games with progression loops such as Candy Crush, Clash of Clans, or Genshin Impact, where spending helps users progress faster or overcome friction.
Productivity tools like Notion or 1Password, where paid features directly improve workflow or save time.
Content platforms such as The New York Times, where premium access unlocks higher-quality or exclusive content.
Creative and professional tools like Procreate or LumaFusion, where users are willing to pay because the tool helps them produce better work.

On the other hand, IAP struggles when the value is unclear, when free alternatives are easily available, or when monetization feels forced instead of natural.

Understanding In-App Advertising (IAA)

In-app advertising flips the model. Users don’t pay. Advertisers do.

Your revenue comes from user attention, typically through impressions (CPM), clicks (CPC), or actions (CPA). Most modern apps rely on a mix of formats:

Banner ads (low impact, low revenue)
Interstitial ads (high visibility, higher revenue)
Rewarded video ads (user-initiated, high engagement)
Native ads (blended into content)

Also check: Best App Monetization Platforms for Publishers

Unlike IAP, advertising monetizes almost every user. Even if each individual generates only a small amount of revenue, the scale makes it meaningful.

This makes IAA a strong fit for:

Utility apps with frequent usage, such as weather apps that users open multiple times a day.
Casual and hyper-casual games where large user bases compensate for low IAP conversion.
Social and community platforms like Instagram or Reddit, where long session times create more ad opportunities.
News and content-driven apps where ads can be placed between articles or within feeds.

The challenge with ads is not monetization. It’s experience. Users tolerate ads, but only up to a point. Poor placement, high frequency, or disruptive formats can quickly hurt retention.

IAA struggles when:

User volume is low
Engagement is inconsistent
The experience is too sensitive to interruption

IAP vs IAA. A Practical Comparison

At a high level, the difference between the two models comes down to who pays and how revenue scales.

IAP vs IAA Table

Factor	In-App Purchases (IAP)	In-App Advertising (IAA)
Who pays	Users	Advertisers
Users monetized	2-5%	Nearly 100%
Revenue per user	High	Low
Revenue consistency	Less predictable	More stable at scale
What it depends on	User value perception	Traffic and engagement
Best for	High-engagement apps with clear upgrade paths	Large user bases with frequent but lightweight usage
Main risk	Low conversion if value isn’t obvious	Poor UX from bad placement or high frequency

IAP vs IAA: a practical comparison for app publishers

In simple terms, IAP depends on how much users care, while IAA depends on how many users you have and how often they show up.

The Hybrid Model. Where Things Get Interesting

Here’s the part most people miss. The question isn’t which model is better. It’s which users you’re trying to monetize.

Because users behave differently:

Some will never pay
Some won’t tolerate ads
Some will do both

A single monetization model ignores this reality. A hybrid model uses it. Instead of forcing every user down the same path, you create multiple paths:

Free users continue using the app with ads
Engaged users upgrade to remove ads or unlock features
Casual users occasionally watch rewarded ads for benefits

You see this clearly in real apps:

Spotify offers a free ad-supported experience while pushing heavy users toward a premium subscription with no ads, offline access, and better control.
YouTube monetizes free users through ads while offering YouTube Premium for an ad-free experience.
Tinder combines subscriptions with additional in-app purchases for boosts and visibility features.
LinkedIn monetizes free users with ads while offering premium plans for recruiters and power users.

This approach aligns monetization with user behavior instead of working against it.

The Revenue Math. Why Hybrid Wins

Let’s look at a simplified example with 100,000 daily active users.

If you rely only on IAP:

3% conversion = 3,000 paying users
$5 average spend = $15,000/month

If you rely only on ads:

1,000,000 impressions per day
$8 eCPM = ~$240,000/month

If you combine both:

IAP revenue = $21,000
Ad revenue = $232,800
Total = ~$253,800

This isn’t about squeezing more out of users. It’s about capturing value from different types of users in ways that feel natural to them.

How Hybrid Monetization Actually Works

The core of hybrid monetization is behavioral segmentation. Not demographics, but how users interact with your app.

For example:

A highly active user may see upgrade prompts
A casual user may primarily see ads
A user showing intent, such as clicking premium features, may get trial offers

Most users fall into three broad groups:

1. Payers (2–5%): These users are highly engaged and willing to spend. The goal here is to give them a premium, often ad-free experience.

2. Ad-tolerant users (60–80%): They won’t pay, but they will engage with ads. Smart placement and frequency matter most here.

3. Ad-resistant users (15–30%): They dislike ads and won’t subscribe easily. A low-cost “remove ads” option can convert some of them without hurting retention.

Choosing the Right Model

Choosing a monetization strategy depends less on your product category and more on how users interact with it.

IAP tends to work best when:

The value is clear and measurable
Users return frequently
There is a meaningful upgrade path

IAA is more effective when:

You have large scale
The product is expected to be free
Usage is frequent but lightweight

Hybrid works best when you want to balance both. It lets you monetize different user segments without forcing a single behavior.

Optimization After Launch

Launching monetization isn’t the hard part. Improving it is.

The difference between an average app and a high-performing one usually comes down to small, consistent improvements:

Testing pricing and packaging
Adjusting ad placement and frequency
Improving segmentation and targeting

These are not one-time decisions. They are ongoing systems.

Conclusion

The apps that win don’t monetize the hardest. They monetize the smartest. They allow free users to stay free, give paying users a better experience, and continuously refine how both groups are served.

If you’re still choosing between ads and purchases, you’re solving the wrong problem.

Start with one model based on your current stage. Add the second once you understand your users. Then keep improving both.

Improving Ad Revenue Without Hurting Experience

If you’re already running ads, the next step isn’t adding more. It’s making your existing setup work better.

That usually means improving auction dynamics. This includes floor pricing, demand competition, and fill rates rather than increasing ad load.

This is where tools like UndrAds come in. Instead of manually managing mediation, they automate optimization in real time, helping improve eCPM without impacting user experience with the help of AI agents.

For most publishers, that translates into a measurable revenue lift without changing how the app feels to users.

In-App Purchases vs In-App Advertising: Why Hybrid Model is Best for Most

Rashmita Behera