In-App Advertising in 2026: What Performance Marketers Need to Know

Most of what you read about in-app advertising in 2026 was written in October 2025 and was a guess. Through August 2026, we can check the guesses against the record. The privacy collapse didn't happen. The Google breakup didn't happen. What did happen came from a German regulator, an Apple pricing memo published in August, and a standards document most UA teams have never read. Here's what's worth changing in your buying, and what isn't.

Privacy Sandbox on Android in 2026: what happened, and what to do

Google retired Privacy Sandbox. The October 17, 2025 announcement named ten technologies going away, six of them with Android components: Attribution Reporting, Protected Audience, Protected App Signals, Topics, SDK Runtime, and On-Device Personalization. As of the feature status page updated August 14, 2026, every one of them is marked for phase-out.

Chrome's third-party cookies never went anywhere either. Google decided in April 2025 not to ship a standalone deprecation prompt, and nothing has changed that since.

So the Android measurement rebuild that sat in your 2026 roadmap can come out of it. The advertising ID is still the basis of Android attribution, and Google has offered no replacement. Two years of "prepare for Android ATT" content aged badly.

Our position, stated plainly: shift budget toward Android. Not because Android is suddenly cheap, but because the risk premium teams have been applying to it since 2022 was priced against an event that got canceled.

AdAttributionKit vs SKAdNetwork: which should you run in 2026?

SKAdNetwork (SKAN) isn't deprecated. Apple's documentation still lists the class as supported, points new campaigns to AdAttributionKit, and confirms the two interoperate: SKAN conversion updates mirror into AdAttributionKit. Run both, and keep your SKAN conversion schema live through the rest of 2026.

Check it yourself. The SKAdNetwork class reference carries no framework-level deprecation notice, only two method-level ones from years back, and the interoperability guidance spells out the bridging behavior.

So the 2025 migration panic was expensive and premature. If your team spent Q1 2026 rebuilding conversion logic against AdAttributionKit and switched SKAN off, you gave up runner-up postbacks and network-side signal for no measurement gain.

AdAttributionKit earns its integration on re-engagement and alternative marketplaces. Apple's framework handles re-engagement conversions with multiple winning postback windows, and SKAdNetwork only ever worked with the App Store. If you're buying re-engagement on iOS or distributing in the EU outside the App Store, that's your reason to invest. Not a sunset date, because there isn't one.

What the German ATT decision means for your iOS opt-in rates

This is the biggest thing most UA teams missed. On August 17, 2026, the Bundeskartellamt closed its App Tracking Transparency case with binding commitments from Apple. Apple has four months from service of the decision to remove discouraging wording and symbols from the prompt, make its own consent request and the third-party request neutral in content, wording, and layout, and let publishers combine the ATT request with GDPR consent in a single clearer flow. An independent trustee monitors compliance for seven years.

The decision binds in Germany. The Bundeskartellamt coordinated it through the European Competition Network and says it may shape how ATT looks in other member states.

Here's what it costs you. Every pre-prompt you've written since 2021 was designed around a prompt that discouraged consent. Those pre-prompts go stale within about four months in your largest EU market, and your German opt-in baseline will move enough to invalidate the CPI and ROAS benchmarks you're pacing against right now. Budget an engineering and creative sprint: rewrite the pre-prompt, rebuild the combined consent flow, and freeze a clean pre-change German cohort. Teams that wait will spend Q1 2027 arguing about whether their numbers moved because of media or because of a dialog box.

The wider picture is uneven, though. Italy's competition authority fined Apple €98.6 million over ATT in December 2025, and a Paris court then rejected the French ad industry's challenge in January 2026.

How Apple's new EU fee structure changes your install economics

Apple announced on August 18, 2026 that EU business terms consolidate on October 1, 2026. The per-install Core Technology Fee will be replaced by a 5% Core Technology Commission. The Initial Acquisition Fee and the Store Services Fee will be eliminated. Apple's EU terms page has the full rate card.

For anyone distributing outside the App Store in Europe, this flips a fixed per-install tax into a revenue share. The marginal cost of one more EU install is no longer a number you pay regardless of whether that user ever monetizes. If your EU scaling ceiling was set by the Core Technology Fee, that ceiling is about to move. Rerun your EU payback models before Q4 planning locks, and retest the geos you capped.

Where mobile ad spend is moving: video overtakes search in 2026

The IAB and PwC full-year 2025 report, published April 16, 2026, put US internet ad revenue at $294.6 billion, up 13.9%. Commerce media reached $63.4 billion, or 21.5% of the total. Video grew 25.4% to $78 billion.

Inside mobile, a crossover is underway. eMarketer forecasts that mobile video ad spending passes all of mobile search this year for the first time. Trade press reporting those paywalled figures puts US mobile in-app video at $98.28 billion, 39.5% of mobile ad spend, against mobile search at 38.3%. Yory Wurmser, principal analyst at EMARKETER, notes that mobile video attracts more than twice the ad dollars CTV does.

That last point should recalibrate how you talk about CTV internally. CTV belongs in a growth mix for its incremental reach, not because it's where the money is. If you're running it, run it with real measurement rather than a lift study you commissioned from the seller: our guide to how CTV-to-mobile attribution works covers the mechanics.

One more number worth acting on. eMarketer, using Sensor Tower data, reported in February 2026 that gaming took 8.1% of US app ad spend, up 42% year over year, while shopping took 16.4% and fell 8.4%. That's a fast shift in where app advertisers are putting money. Spend share isn't the same as auction density, so check your own win rates and clearing prices in gaming before assuming last year's floors still hold.

Why the Google ad tech ruling hasn't changed what you buy yet

Judge Brinkema found in April 2025 that Google illegally monopolized publisher ad tech. As of 31 August 2026, no remedies ruling has been issued. The predictions of a 2026 breakup were wrong, or at least early.

Europe moved faster. The Commission fined Google €2.95 billion in September 2025, and by mid-December Google had dropped Unified Pricing Rules and the Open Bidding revenue share for EU publishers. A string of private antitrust suits from independent ad tech firms is now being consolidated in the US.

Don't restructure your supply path around a decision that hasn't landed. Do get the terms you'd want post-remedy in writing today: fee disclosure per hop, auction logic in plain language, the right to audit, and a log-level data commitment. Those cost nothing to ask for while everyone's lawyers are nervous.

What agentic standards mean for how you'll run campaigns

IAB Tech Lab published Agentic Mobile on June 22, 2026, an open standard donated by CloudX that gives AI agents a defined interface to mobile in-app inventory, pricing, and reporting over MCP and A2A. v1 is supply-side. Demand-side protocols are mapped for v2. The Tech Lab also announced the finalized Agentic Real Time Framework v1.0 on August 12, 2026.

Buy-side automation kept shipping too. Apple Ads launched a Maximize Conversions bidding strategy in February, announced custom creative assets for App Store ads in June for a fall launch, and opened Apple Maps campaign creation in the US and Canada in August, with delivery to follow.

The useful move here isn't adopting anything yet. It's asking every supply partner one question on your next call: Which agentic protocols are you implementing, and on what timeline? Their answer tells you whether they're building for a market where software negotiates floors and deals, or hoping it goes away.

In-app advertising in 2026: what to change now

In-app advertising in 2026 rewarded the teams that didn't panic. The frameworks you were told to abandon still work; the regulatory action that matters came from Germany, and spend moved into in-app video while everyone was watching CTV. Check your German consent flow, rerun your EU unit economics, stop discounting Android.

If you're rebuilding your in-app buying around any of this, we're happy to look at your setup with you. Our DSP is built for teams who want to see how the media is actually bought.

FAQ

Is SKAdNetwork being deprecated in 2026?No. Apple's developer documentation still lists SKAdNetwork as a supported class, with no framework-level deprecation notice. Apple directs new campaigns to AdAttributionKit, and the two interoperate, with SKAdNetwork conversion updates mirroring into AdAttributionKit. Keep both running.

What happened to Privacy Sandbox on Android? Google announced in October 2025 that it was retiring Privacy Sandbox technologies. As of August 2026, Attribution Reporting, Protected Audience, Protected App Signals, Topics, SDK Runtime, and On-Device Personalization are all marked for phaseout on Android. No replacement framework has been announced.

Will Apple change the ATT prompt everywhere, or only in Germany? The Bundeskartellamt's commitments apply in Germany. The authority coordinated the decision through the European Competition Network and said it may affect how ATT is designed in other EU member states, so plan for the change to spread rather than stay local.

Should you still buy CTV for app installs in 2026? Buy it for incremental reach, not because it's the largest pool of money. eMarketer's 2026 figures show mobile video attracting more than twice the ad dollars CTV does. If you run CTV, insist on attribution you control rather than seller-supplied lift, and measure it against what actually moves in your account.

What is Apple's Core Technology Commission? A 5% commission on digital transactions in apps distributed outside the App Store in the EU, replacing the per-install Core Technology Fee from October 1, 2026. The Initial Acquisition Fee and Store Services Fee are eliminated at the same time. For UA teams, it converts a fixed per-install cost into a revenue share.

AdAttributionKit or SKAdNetwork: which should you use?Both, for now. SKAdNetwork has no deprecation date and still carries App Store install measurement. AdAttributionKit earns its integration for re-engagement conversions and for apps distributed through alternative marketplaces, neither of which SKAdNetwork supports