I had 50,000 emails in my inbox. Most cleaners wanted £8/month and my data. So I built my own. Here's why MailBroom runs entirely on your iPhone, why that matters for privacy, and why it's 88% greener than cloud alternatives. The Problem Most email cleaners – like Clean Email – use cloud-based AI. That means your emails leave your device, get processed on energy-hungry servers, and contribute to data centers' 0.3% of global emissions. According to the Carbon Literacy Project, a standard email ge