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 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.
*The Solution *
MailBroom’s AI runs entirely on your iPhone. Your emails never leave your device.
Recent 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.
Key Features
What MailBroom does differently:
Smart Triage – Guides you through one sender at a time. One decision clears thousands of emails instantly.
Smart Unsubscribe – Sends real RFC 8058 opt-out requests. No fake workarounds.
Smart Organise – Create folders and file emails by sender with one tap.
5 free cleanups + 5 free sweeps – No credit card, no trial expiry.
£0.99/mo intro / £1.99 regular – Cancel anytime.
Architecture
MailBroom 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.
Results
A 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.
Try MailBroom free today.
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