Free games have ads because making a game costs real money, and most players never spend a cent. Ads let a studio earn from the many people who play for free. That money pays for servers, updates and the people who build the thing.
There is more to the story. Some ads pay by the view. Some pay when you tap. Some are really other games trading players back and forth. Let's follow the money, one step at a time.
TL;DR
- Only a small share of players ever pay for a game, so ads earn from everyone else. One Game Developer report cites a study putting non-payers at 97.8% of mobile users.
- Advertisers pay per thousand views. That rate is called eCPM, and it is how studios measure what a player's attention is worth.
- Many ads in free games promote other games. That is a trade in players, not a glitch.
- Opt-in ads, like rewarded video, tend to feel fairer because you choose them.
- Some free games skip ads in the gameplay and earn in other ways. We tell you how we do it below.
Table of Contents
- The short answer: most players never pay
- How ads turn into money
- The kinds of ads you meet in free games
- Why so many ads are for other games
- Ads and purchases can live together
- Can a free game earn without ads?
- Perspective: what we think about ads in free games
- How to enjoy free games on your terms
- Try a free space game with no purchases
- FAQ
- Sources
The short answer: most players never pay
Picture a hundred people who download the same free game. Maybe two or three will ever buy something. The rest will play, enjoy it and leave without paying.
The numbers back this up. A Game Developer article cites a Swrve study finding that 97.8% of mobile game users never spend any money. It also notes that the makers of one famous farming game said only 3% to 5% of its players ever paid.
Google's AdMob guidance puts the same idea plainly. Only a small percentage of mobile app users spend in apps in a given month. So many developers turn to advertising to open up new revenue.
That is the whole logic. A game that costs nothing to download still costs something to make. Ads are one way to bridge the gap.
Free does not mean cheap to run
A game needs artists, programmers, testers and servers. It needs fixes after launch. It needs hosting that holds up when thousands of players show up on the same day.
The ESRB's guide for parents explains that a truly free game asks for no money to play, and that its costs are usually offset by advertisements. Other free-to-play games earn through in-game purchases instead.
So the word free is about what you pay. It is not about what the studio spends.
How ads turn into money
An ad does not need a tap to earn. In many cases the studio is paid when the ad is shown.
The usual yardstick is eCPM. It means effective cost per thousand impressions. In plain words: how much an advertiser pays for a thousand views. Game Developer notes that developers track their ad revenue through eCPM.
How big is it? IronSource's documentation says that with the right setup, playable and video interstitials can reach $10 to $20 eCPMs in top-tier countries, with an average of $4 to $6. That means a single view earns a fraction of a cent. A thousand views earn a few dollars.
That is why ads show up so often. One ad is tiny money. Millions of ads are a business.
The scale of it
It adds up quickly. Sensor Tower's report says mobile games worldwide made over $12 billion in ad revenue in 2025, with 2.4 trillion ad impressions served.
Market researchers see the same direction. IMARC Group estimates the in-game advertising market grew from USD 9.41 billion in 2025 to USD 10.43 billion in 2026, with North America as the largest region.
It depends where you live, too. In the US, in-app purchases tend to carry more of the load than in some fast-growing markets. Since this game is played worldwide, the mix of ads and purchases is different from country to country.
The kinds of ads you meet in free games
Not all ads are alike. Knowing the type helps you see why some feel fine and others feel pushy.
The IAB's 2025 framework, summarized by eMarketer, sorts in-game advertising into four formats:
| Format | What it is | How it feels |
|---|---|---|
| Intrinsic | Ads built into the game world, like a poster on a virtual wall | Often barely noticed |
| Rewarded | You choose to watch, and you get something back | Usually the most welcome |
| Interstitial | Full-screen ads between levels or rounds | Can break your flow |
| Adjacent | Ads around the game, such as on the page that hosts it | Easy to ignore |
The same source reports that 62% of players say rewards-based ads are the most engaging type, according to a survey by Attest.
Why choice matters
Players like control. GamesBeat's research found that 71% of gamers want to choose whether to view or click an ad. It also found rewarded video stands apart as the most useful format, since it hands you something to use right away.
That is a simple deal. You give a few seconds. The game gives you a boost. The studio gets paid.
Why so many ads are for other games
Have you noticed that most ads in free games are for other free games? It looks odd. If games earn from ads, and the ads are for games, where does the money come from?
There are a few answers.
Studios buy players. A game that wants more players buys ad space in other games. A DW report on in-game video ads found that about half of the ads on one big platform promoted other games or apps. The other half were paid for by consumer brands.
Some of the money is a swap. A peer-reviewed study by Haenlein and colleagues describes a practice it calls cross-promotion. Firms sell ad slots to competitors, who use them to advertise their own products. A senior manager at a hyper-casual publisher put it bluntly: much of the work is about buying and selling customers.
It can suit both sides. The same study explains that someone who already plays one game is a good match for a similar game. It also says a swapped player gets a fresh start, so their engagement resets in the new game.
So the loop is real. A player who loves one game might love the next. The ad is the doorway.
Why the ads can feel endless
Short sessions help the loop. When people play for a few minutes at a time, there are many natural breaks. Each break is a chance to show an ad. That is why some games feel like they stop every minute.
It does not have to be that way. How often a game shows ads is a design choice.
Ads and purchases can live together
Many free games use both. A few players buy things. Everyone else sees ads.
Google AdMob explains that ads can sit beside in-app purchases without cannibalizing them. It also says rewarded ads can give players a preview of purchasable items, and sometimes more non-paying players turn into paying ones.
Research from UCLA's business school points to why this matters. Its review of the $116 billion mobile gaming industry says most mobile games cost nothing to download and play, so developers rely on in-game advertising and in-app purchases. It also finds that players seek novelty, and that playing with others makes a game stickier.
So the business side of free games is a mix. Ads for the many. Purchases for the few.
Can a free game earn without ads?
Yes. It is rarer, but it happens.
One well-known puzzle game reached 26.1 million users, and 21 million of them got it without paying. Around 35% to 40% of its players bought an expansion for $1.99, The Verge reported. That is free to attract, pay to unlock.
Another route is a one-time deal. A developer interviewed by Pocket Gamer explained that a game was free with no ads or microtransactions because a streaming release had already earned enough to sustain the team.
So the answer to "how does a free game with no ads make money?" is: from somewhere else. Paid extras, a partner deal, or a different business behind it.
Perspective: what we think about ads in free games
We make a free space game. So we think about this question a lot.
Anti-Horizon starts you as a tiny asteroid. You pull in smaller bodies with gravity. You grow through 22 classes, all the way to a galaxy-scale black hole. There are no in-game purchases. There are no subscriptions. There are no paid upgrades. Nothing in the game is locked behind a wallet.
We think that is the best deal for a player. You can play for ten minutes or ten hours. Your growth comes from your own skill, not your spending.
Our site may show ads. Signed-in players aged 13 or above may also be offered optional rewarded ads. Optional matters to us. You stay in charge of what you watch.
We also think a game can teach while it plays. Gravity, mass and orbits show up in simple form. You feel why a bigger body pulls harder. You do not need a textbook.
Good free games respect your time and your choices. That is the bar we aim for.
Anti
How to enjoy free games on your terms
Ads are part of the deal, but you still have choices. A few habits help.
- Prefer opt-in ads. If a game offers a reward for watching, you pick the moment. That is usually the least annoying format.
- Check the money model first. Look at the store page or the site. Does the game sell items? Does it show ads? Does it do both?
- Notice the pacing. If ads break every minute, the game is built around them. If they appear rarely, it is built around play.
- Mind the age rules. Some features are for signed-in players of a certain age only. Parents can read the ESRB's explanation of what free-to-play really means.
- Pick games with no pay-to-win. When purchases do not decide the winner, you compete on skill.
That last one matters most in multiplayer. A fair arena is a fun arena.
Try a free space game with no purchases
If you like the idea of a free game with no in-game purchases, give Anti-Horizon a spin. It runs in your browser, with no install needed on PC or Mac.
Start as an asteroid. Grab smaller bodies. Grow, and watch rival worlds fight for the same resources.
You can also try daily challenges, multiplayer arenas, survival runs, boss gauntlets, salvage expeditions and a sandbox mode. Play Anti-Horizon free and see how far you can drift.
FAQ
Why are there so many ads in mobile games?
Because most players never pay, and ads are how studios earn from them. Each view brings in a small amount, so games show many. Some of those ads are also studios paying for new players, as DW reported.
How do free games make money?
Mostly from ads, in-app purchases, or both. A small group of players buys items. Everyone else is earned from through ads. Some games also earn through expansions or outside deals.
Why are most game ads for other games?
Studios pay to reach players who already like games. Ad slots are also swapped between publishers, which a peer-reviewed study calls cross-promotion. It helps both sides find fresh players.
Are rewarded ads better than other ads?
Many players think so. In a Attest survey reported by eMarketer, 62% called rewards-based ads the most engaging type. You choose to watch, and you get something back.
How does a free game with no ads make money?
It earns elsewhere. That might be paid expansions, a licensing deal, or another business that funds the game. The Verge's report on one puzzle game shows the paid-expansion route.
Sources
- Mobile Ads: the Key to Monetizing Gaming Apps, Google AdMob
- What Drives Engagement in the $116 Billion Mobile Gaming Industry, UCLA Anderson Review
- A Parent's Guide: What Free-To-Play Really Means, ESRB
- How Does Free Game Make Money?, Game Developer
- Interstitial ad, IronSource Knowledge Center
- Gaming Deep Dive: Ad Monetization, Sensor Tower
- In-Game Advertising Market Size, Share and Forecast 2034, IMARC Group
- FAQ on video game advertising, eMarketer
- How ad-supported game monetization can be a win-win-win, GamesBeat
- Video ads take off in mobile gaming apps, DW
- Satiation and cross promotion: Selling and swapping users, Haenlein et al.
- How Frank Underwood helped Monument Valley find a new audience, The Verge
- Interview: Poinpy developer Ojiro Fumoto, Pocket Gamer