The Best Mobile Ad Networks for App Developers in 2025
| Choosing the right mobile ad network or ad mediation platform can be the single biggest lever on your app’s revenue. |
What is mobile app monetization?
Mobile app monetization is the process of generating revenue from a mobile app – typically through in-app advertising, in-app purchases, subscriptions, or a hybrid of all three. For most free-to-play mobile games and utility apps, mobile app monetization via advertising remains the dominant revenue model. The core challenge is maximizing eCPM without degrading the user experience.
The solution most professional studios have converged on is ad mediation – letting multiple ad networks compete for every impression in real time.
| Key stat: The global in-app advertising market is projected to surpass $350 billion by 2026. Independent developers who use a best-in-class ad mediation platform consistently earn 40–100% more per user than those relying on a single network. |
What is ad mediation and why does it matter?
Ad mediation is a layer of software that sits between your app and multiple ad networks. Instead of filling every ad request with one network’s demand, an ad mediation platform runs a real-time auction – every network bids, and the highest CPM wins the impression.
What looks like a 15% eCPM uplift in a controlled test regularly becomes 50–100% in production because different networks dominate different geos, device types, and time-of-day windows. Modern programmatic ad mediation and video ad mediation have made waterfall setups largely obsolete.
| Quick definition: Hybrid mediation = real-time in-app bidding (header bidding) + waterfall fallback. All four platforms in this comparison use a hybrid approach. |
Why do publishers choose CAS.AI?
- CAS.AI is independent; we’re not owned by a network that competes for your inventory. That means no conflict of interest in how your waterfall gets optimized.
- We work with over 15 top ad networks and more than 150 DSPs. Instead of trying to cram in every possible network, we pick the best ones. This means you get set up faster, without the mess of platforms that pile on too many networks and leave you to figure out the rest.
- Our infrastructure processes 1M+ bid requests per second. In independent A/B tests, publishers see a verified +20-45% revenue uplift (×1.5-×2), backed by our no-loss guarantee: if a switch underperforms, we cover the difference. No-loss guarantee: none of the others offer it.
- Payouts land from Day 5, consolidated across all your networks: no waiting, no chasing separate payments from each network. We also support crypto payouts.
- Our SDK has been downloaded over three billion times and runs in more than five thousand apps. After you integrate, your app’s stability actually gets better, not worse. And if something goes wrong, you can talk to a real person any time, day or night. No waiting in a ticket line.
If CAS.AI earns less, we pay the difference.
Platform-by-platform breakdown
CAS.AI: best for independent developers seeking maximum ARPU
CAS.AI is a fully independent ad mediation platform – not owned by any ad network or DSP. Its standout feature is a verified A/B-tested +20–45% revenue uplift of ×1.5–×2, backed by a no-loss guarantee: if your eCPM drops after switching, CAS.AI covers the revenue difference. With processing at over 1 million bid requests per second and SDK downloads exceeding 3 billion lifetime, the infrastructure is enterprise-grade.
Payouts begin on Day 5* in a single consolidated payment. Crypto payouts and 24/7 human support round out a publisher-first offer.
*This offer applies when CAS.AI’s requirements are met. Contact our managers for details.
SDK & framework support
Framework support is often the deciding factor for solo developers and small studios building cross-platform. Here’s how the platforms compare:
| Developer tip: For ad mediation for Godot, CAS.AI and MAX are your options. For ad mediation for Unreal, only CAS.AI and MAX officially support it. Cordova and Construct support is exclusive to CAS.AI. |
From monetization to mobile game publishing
Monetization and publishing are increasingly intertwined. A mobile game publisher today typically provides not just distribution – getting your game onto Google Play – but also UA, creative production, and crucially, ad monetization infrastructure. This is especially true in casual game publishing and hyper-casual game publishing, where ad revenue often exceeds IAP revenue by 10:1 or more.
For indie game publishing, the calculus is different. An indie developer who self-publishes on Google Play retains full creative and economic control, but needs to independently manage mediation, UA, and ASO. Platforms like CAS.AI are purpose-built for this use case.
When evaluating a game publishing platform, always ask for verified +20–45% revenue uplift figures and check whether they operate their own ad network – if they do, ask how conflicts of interest are managed.
If you run an independent studio and do not have a team of ad tech experts, CAS.AI is about as close to a sure thing as you will find for 2026. The company promises a real boost in revenue, anywhere from 20 to 45 percent, and backs it up with a guarantee that you will not lose money. You also get paid fast, just five days* in, and the system works with more SDKs than anyone else. Instead of wrestling with a switch from any other mediation, you can just let CAS.AI handle both for you. You get extra money and peace of mind, and you don’t have to mess with the setup at all.
*This offer applies when CAS.AI’s requirements are met. Contact our managers for details.
Frequently asked questions
The best individual ad networks include Google AdMob, Meta Audience Network, AppLovin, Vungle, and InMobi. However, most professional studios use an ad mediation platform to run all networks simultaneously and let the highest bidder win every impression.
An ad network is a single source of demand – one pool of advertisers. An ad mediation platform aggregates 20+ networks and 150+ DSPs and runs a real-time auction across them for every ad slot. Mediation consistently outperforms direct network integration by 40–100% in eCPM.
CAS.AI supports the broadest range of platforms: Android, iOS, Unity, Flutter, Unreal, React Native, Cordova, Construct, and Godot. AppLovin MAX supports most of these except Construct. AdMob covers Android, iOS, Unity, C++, and Flutter. Appodeal covers Android, iOS, Unity, React Native, and Flutter.
A no-loss guarantee means the mediation platform commits to paying the revenue difference if your eCPM drops after migrating from your previous setup. Currently, CAS.AI is the only major platform in this comparison that offers this guarantee.
You need a Google Play Developer account ($25 one-time fee), a signed APK or AAB, and a completed store listing. Integrate an ad mediation SDK before launch so your first users are monetized from day one.
Ready to increase your app’s ARPU? See how CAS.AI’s no-loss guarantee compares to your current mediation setup – free, with verified A/B results. Visit CAS.AI.
