Every mobile game business model answers one question: where does the money come from? The two main answers are ads and purchases. IAA means in-app advertising, where you earn by showing ads. IAP means in-app purchases, where players pay for items, currency or features. Most successful games today use both, and the real work is finding the right mix.

This post compares IAP vs IAA in mobile games, explains why hybrid monetisation has become the default for many game app business models, and gives a practical way to tune the balance. We run UA for hybrid games, so we also cover how the mix changes the way you buy players.

What is IAA in a mobile game?

With IAA, players do not need to spend money. They watch ads and you are paid by the ad network. The main formats are:

  • Rewarded video. The player chooses to watch an ad in exchange for something useful, such as a continue, a bonus or extra currency.
  • Interstitials. Full-screen ads shown at natural breaks, such as between levels.
  • Banners. Small persistent ads. They earn less and are less common in modern games.

IAA works well when your game has a large, casual audience and short, repeatable sessions. Every player has some value, not only the small share who pay. The weakness is that revenue per player is limited by how many ads players will tolerate before they leave.

What is IAP in a mobile game?

With IAP, a small share of players spend, and some spend a lot. Typical items include currency packs, starter bundles, boosters, cosmetics and subscriptions. IAP suits games with deep progression, collection or competition, where players want to go faster or look different.

The strength of IAP is high value per paying player. The weakness is dependence: if few players convert, revenue stays small, and the economy must be designed carefully so spending feels like a choice, not a toll.

IAP vs IAA: the main differences

The two models differ in who pays, when revenue arrives and what they demand from your design.

  • Who pays. IAA earns from almost every active player. IAP earns from a minority.
  • Speed of data. Ad revenue shows up from the first sessions, so you can judge cohorts quickly. Purchase revenue often needs more time to show a pattern.
  • Design pressure. IAA rewards frequent, short moments to place ads. IAP rewards progression, goals and an economy with something worth buying.
  • Player experience risk. Too many ads drive players away. Too aggressive a shop does the same.
  • Market differences. In some regions, payment habits and local incomes mean fewer players buy, so ads carry more weight there. That is one reason a single global average can mislead.

Neither is better in every case. The right balance depends on your genre, audience and how long your players stay.

Why hybrid games combine both

Hybrid monetisation started in hypercasual and has spread to casual, hybrid-casual and lighter midcore games. There are three main reasons.

First, it monetises more of the audience. Players who never spend still bring ad revenue, and players who spend can also watch rewarded ads.

Second, it reduces risk. If purchase conversion is low in a new market, ads can keep a campaign viable while you improve the economy.

Third, it speeds up learning. Ad revenue gives early cohort data, which helps test retention, engagement and creatives sooner. Many studios use ads to prove a game works, then add or deepen IAP once retention is solid.

Our own results follow this pattern. Across the games we manage, the revenue mix is about 80 percent ads and 20 percent in-app purchases. That is one mix, from our games, not a rule, but it shows why we treat ad revenue as a first-class part of LTV, not an afterthought. Blended ROAS has stayed above break-even across 40 months of aggregated results, and the hybrid model is part of why.

How to find the right mix

There is no formula, but there is a process.

1. Start with the core loop

Look at how your game is played. Short, repeatable sessions create natural ad moments. Long sessions with deep progression create natural purchase moments. Your game design should lead the mix, not the other way round. Build these moments in from the start rather than adding them late.

2. Make rewarded video the centre of the ad side

Rewarded video is optional, so it carries less risk to retention than forced formats. Offer it where the reward is clearly worth it, such as continuing after a failed attempt or doubling a reward. Add interstitials lightly and only after rewarded video is working.

3. Protect payers

The classic mistake in a hybrid game is letting ads annoy the players most likely to buy. Consider these rules:

  • Reduce or remove forced ads once a player has made a purchase.
  • Offer a remove-ads purchase or a subscription for players who want a cleaner experience. This turns ad fatigue into revenue.
  • Check that ads do not appear in front of the shop or in key purchase moments.

4. Test one change at a time

Treat ad frequency, format mix and placement as experiments. Compare cohorts over a week or two and read revenue per player alongside retention. A change that raises revenue but lowers retention may cost you more later. The same applies to prices and bundles on the IAP side.

5. Look by country

Mix varies by market. A balance that works in one region may not work in another, so review ads and purchases by country before changing the whole game.

How the mix affects UA

Your monetisation mix shapes the way you buy players. If most revenue comes from ads, your LTV builds quickly and predictably, which helps with short payback windows. If more comes from purchases, LTV arrives later and depends on a few high-value players, so you need patience and larger cohorts to judge a campaign.

For hybrid games, the key is to measure total revenue, not one side only. Make sure ad revenue and purchase revenue both flow back into your attribution data, and compare campaigns on combined return. Our guide to ROAS vs retention campaigns explains how to set up campaigns that optimise for total revenue, and LTV for mobile games shows how to combine both streams in one forecast.

Seeing the models in practice

You can see how core loop shapes the mix in our own games, such as Airplane Flight Sim Pilot 3D and Balls Rolling Going Fast Sky. A flight game and a one-touch rolling game offer different moments for ads and purchases, because the core loop is different. For a broader view of the business side, see our overview of the mobile game business.

A simple decision guide

  • If your game is casual with short sessions and a broad audience, lead with ads and add IAP as depth grows.
  • If your game has deep progression and a strong economy, lead with IAP and use rewarded video as a helpful extra.
  • If you are unsure, launch with the ad side working, learn from early cohorts, and build the economy as retention proves itself.

Whichever way you lean, keep both revenue streams visible in your reporting. The right mix is the one that grows total revenue per player without hurting retention, and that is something you can only find by measuring both.