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  "path": "/martin_dobson_c9b43ad1379/i-built-an-inbox-cleaner-thats-88-greener-than-cloud-alternatives-heres-how-7f7",
  "publishedAt": "2026-06-18T11:21:12.000Z",
  "site": "https://dev.to",
  "tags": [
    "ai",
    "productivity",
    "privacy",
    "ios"
  ],
  "textContent": "**I had 50,000 emails in my inbox. Most cleaners wanted £8/month and my data. So I built my own.**\nHere's why MailBroom runs entirely on your iPhone, why that matters for privacy, and why it's 88% greener than cloud alternatives.\n\n**The Problem**\nMost 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.\n\nAccording to the Carbon Literacy Project, a standard email generates about 4 grams of CO₂e. With 281 billion emails sent daily in 2018, that's ~410 million tons of CO₂ annually – nearly half the emissions of commercial aviation.\n\n*_The Solution *_\nMailBroom's AI runs entirely on your iPhone. Your emails never leave your device.\n\nRecent research from UC Riverside shows on-device AI inference can reduce energy consumption by up to 95% compared to cloud-based processing. Qualcomm confirmed similar findings – around 90% less energy per query.\n\n**Key Features**\nWhat MailBroom does differently:\n\nSmart Triage – Guides you through one sender at a time. One decision clears thousands of emails instantly.\n\nSmart Unsubscribe – Sends real RFC 8058 opt-out requests. No fake workarounds.\n\nSmart Organise – Create folders and file emails by sender with one tap.\n\n5 free cleanups + 5 free sweeps – No credit card, no trial expiry.\n\n£0.99/mo intro / £1.99 regular – Cancel anytime.\n\n**Architecture**\nMailBroom connects to any IMAP server. Credentials are stored in iOS Keychain. AI classification happens on-device using Core ML. No external servers. No data harvesting.\n\n**Results**\nA 50,000-email inbox cleanup with MailBroom saves the equivalent of ~200 kg of CO₂ that would have been emitted over the lifetime of those emails remaining in the cloud.\n\nTry MailBroom free today.\n\n\n",
  "title": "I Built an Inbox Cleaner That's 88% Greener Than Cloud Alternatives. Here's How."
}