Case Study: with (by IGNIS) uncovers 90% fraudulent installs and protects ad spend with SpiderAF

We Sat Down To Talk With Marketers From Matching App with Using SDK Data for Fraud Protection

with by IGNIS, the team behind the matching app "with," faced rapidly rising non‑incentive acquisition costs (escalating to about ¥3M/month) and puzzlingly low conversion rates that suggested widespread ad fraud. An initial in‑house SDK trial in early 2018 exposed the severity of the issue — roughly 90% of installs were flagged as fraudulent — but the SDK’s real‑time CTIT checks couldn’t catch all sophisticated signals like foreign language device settings, overseas‑sold devices, or very old OS versions.

To address this, with by IGNIS ran a trial of Spider AF alongside their SDK. Spider AF picked up additional fraud patterns the SDK missed (language/device/OS anomalies), which gave a fuller, post‑hoc view of invalid traffic, improved attribution, and made agency conversations more constructive. The combined approach with Spider AF enabled clearer justification for billing adjustments, better fraud classification, and stronger protection of marketing spend.

with by IGNIS

Koji Yamamot

Marketing Planner