PushSandbox

PushSandbox is a web app (with optional mobile companion) that lets product and growth teams preview, validate, and stage push notifications before they hit real users. It provides a “device lab” of virtual personas and real-device previews (iOS/Android) to catch truncation, emoji rendering, deep-link failures, localization issues, and broken personalization tokens. Teams can run approval workflows, schedule staged rollouts, and automatically block risky sends (e.g., missing deep links, invalid segments, high-frequency violations). It integrates with existing push providers (Firebase Cloud Messaging, OneSignal, Braze) so you don’t replace your stack—you add a safety layer. This is a traditional app with light AI assistance for copy linting and risk scoring (e.g., spammy phrasing, policy-sensitive words, or likely opt-out triggers). It’s practical, unglamorous, and solves the embarrassing mistakes that cost retention.