AppLovin incrementality testing answers the question platform ROAS cannot: is the revenue AppLovin claims actually new revenue for your business? We set a blended MER baseline, design a geo holdout or on/off test, and compare incremental ROAS with your breakeven rather than with the platform number. The result then maps to a decision rule: scale, hold and fix, or cut.
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The example below is illustrative, not a client result.
| Line | Illustrative value |
|---|---|
| Axon spend, test period | $60,000 |
| Platform-reported ROAS | 3.2x |
| Blended MER before Axon | 2.40x |
| Blended MER with Axon | 2.51x |
| Revenue lift over baseline | ~$108,000 |
| Incremental ROAS | ~1.8x |
| Breakeven ROAS at 55% gross margin | 1.82x |
Incremental ROAS is revenue lift over the pre-Axon baseline divided by Axon spend, not the platform figure. Breakeven ROAS is 1 divided by gross margin. In this example the platform reports 3.2x, while incremental ROAS of about 1.8x sits just under the 1.82x breakeven.
Platform ROAS and blended MER split for three reasons:
As a rule of thumb, a channel under roughly 10% of total spend will not move blended MER detectably in a month.
| Measure | What it divides | Use it for |
|---|---|---|
| Platform ROAS | Revenue attributed to AppLovin ÷ AppLovin spend, in the reporting mode and cohort window you select | Optimization inside the platform |
| Blended MER | Total revenue ÷ total ad spend across every channel | Business-level judgment |
| Incremental ROAS | Revenue lift over the pre-Axon baseline ÷ Axon spend | Comparing with breakeven, 1 ÷ gross margin |
Decision rules after the read
| Incremental ROAS vs breakeven | Reading | Next step |
|---|---|---|
| Above breakeven by 30%+ | Clear contributor | Scale in budget steps, retest at 2x spend |
| Within 30% of breakeven | Marginal, margin-dependent | Hold spend, fix creative or feed, retest |
| Below breakeven | Substitution or overlap | Cut or restructure before spending more |
AppLovin traffic can be incremental, but attributed conversions alone do not prove it. The cleanest answer comes from a controlled geo holdout or another well-powered incrementality test that compares exposed markets with similar control markets. Treat incrementality as a testable business question, not a platform promise.
Blended ROAS, often monitored as MER, compares total business revenue with total marketing spend. Because channels can overlap and reporting rules differ, use platform ROAS for optimization and blended performance for business-level judgment.
Two to four weeks, after a four-week baseline. Shorter reads are dominated by weekly seasonality and promo calendars.
Below 10% of spend, we use an on/off test instead of a geo holdout: pause the channel for two weeks and read the MER curve. It's noisier, but usually enough to settle a budget argument.
No. Post-purchase surveys and marketing mix modeling corroborate a holdout; neither replaces one.
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Blended MER is total revenue divided by total ad spend across every channel. AppLovin reports that 80% of web conversions happen within 24 hours of the click, which makes the platform number fast.
Treat platform ROAS as the engine's scorecard for its own optimization, and judge the channel on blended and incremental results. Our position is that no channel earns scaled budget on its own reporting, Axon included, and the brands that have scaled on Axon are the ones that tested first.
Tommy Patterson walks through what AppLovin attribution counts, why platform ROAS runs ahead of blended MER, and how the holdout test works. The full written guide: AppLovin attribution explained.
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