First look at the Reetle SmartInk I - a magnetic e-ink micro reader and AI Recorder for both reading and note taking
The Back of Your Phone Is Dead Space. Reetle’s SmartInk I Turns It Into an E-Reader
This 5.4-millimeter magnetic E Ink slab combines distraction-free reading, ambient to-do lists, and offline AI voice transcription without forcing audio into the cloud.
For years, the back of the modern smartphone has been little more than a mounting plate for wallets and charging coils. Reetle wants to turn that wasted space into a calm, secondary computing surface. Priced at $149, the Reetle SmartInk I (model ETS 1301) is a magnetic micro e-reader and AI voice recorder designed to live on the rear of your phone, offering a glare-free screen to read books, capture spoken thoughts, and track tasks without unlocking your main display.
Even the packaging signals Reetle’s literary ambitions. The hardware arrives in a box styled like a hardcover book, opening to a manifesto about quiet technology that "listens when you record, reads when you study, and remembers when you forget." Inside sits a remarkably slim device: at 5.4 millimeters thick and 65 grams, the SmartInk I snaps onto the back of an iPhone Air with strong magnets that feel immediately secure and pocket-ready.
Privacy-First AI Recording Without Cloud Lock-In
What separates the SmartInk I from the current wave of AI voice recorders is its refusal to hold your data—or your wallet—hostage to the cloud. With a tap on the 3.97-inch E Ink touchscreen, the built-in microphone captures meetings or voice memos directly onto the device’s 4 GB of local storage (about 3.6 GB user-accessible), no phone required.
Once paired via Bluetooth 5.0 and Wi-Fi to the companion iOS app, you get flexibility that most AI gadgets withhold. Activating the device grants 3,000 AI credits—plus a 100-credit welcome bonus—to generate cloud transcriptions across 100+ languages, structured summaries, action items, and visual mind maps.
Crucially, however, you never have to upload a single recording to remote servers. By downloading offline language packs and built-in speech models—supporting European languages like Swedish and German—you can run transcriptions and summaries completely on-device. Alternatively, you can disable auto-transcription to save credits, transfer raw audio files to your iPhone, and process them in your own Google Gemini subscription.
An Always-On Productivity Hub
Because E Ink consumes zero power to hold a static image, the SmartInk I doubles as an always-on task board. To-dos extracted from recordings or added in the app stay visible on the back of your phone all day, and native Apple Reminders integration keeps tasks synced across iOS. When idle, you can also run any phone photo through an in-app AI filter to create a custom e-paper sleep wallpaper.
An independent 1,100 mAh battery charged via USB-C powers the unit for up to eight hours of continuous recording or over a month of standby, never draining your phone’s battery.
How It Holds Up as a Micro E-Reader
For e-ink enthusiasts, the real hook is having a pocketable micro-reader always within reach. The 480 x 800 display delivers 235 PPI, rendering EPUB, PDF, and TXT files transferred in seconds over Wi-Fi from the Reetle app. With no frontlight, reading relies on ambient light just like real paper.
Still, first impressions reveal a few trade-offs. Unlike matte e-paper panels, the SmartInk I’s screen has a noticeably glossy finish that catches reflections more easily. Because the chassis only has a single power button, page turns require tapping or swiping the touchscreen rather than clicking physical buttons. And while basic font settings are included, dedicated readers will wish for CrossPoint Sync or KOReader Sync support to keep reading progress aligned across other devices.
Even with those caveats, the Reetle SmartInk I nails a clever hybrid formula. By merging a micro e-reader, an Apple Reminders task board, and an offline-capable AI recorder into one magnetic slab, it turns the back of your phone into the calmest screen you carry.
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