Why Meta, Google, your MMP and App Store Connect never report the same iOS install numbers, which number to use for which decision, and the SKAdNetwork and AdAttributionKit setup tasks to hand to your developers.
An ecommerce app is judged on first-order CPA and repeat purchases, not installs. When a brand app is worth it next to marketplace stores, a payback sheet in VND, deep links, voucher fraud rules and how to split UA from retargeting in the 9.9 to 12.12 season.
For a banking, e-wallet or fintech app in Vietnam, an install is only step 1: money comes after eKYC and the first transaction. How to set CPA by event, which State Bank rules shape the funnel, and how to stop referral and install fraud.
Game UA in Vietnam pays off only if the D7 numbers say so. Retention benchmarks, a payback sheet in VND, channels, playable ads specs and what Decree 147/2024 requires of every game ad.