This pretty affordable iPhone accessory adds a versatile e-ink display

SmartInk I: iPhone case with an e-ink display (Image source: Reetle)

The Reetle SmartInk I is a versatile e-ink display that attaches to the back of an iPhone to provide additional functionality. Besides working as an e-reader, it can also create voice notes and show a wide range of content.

Silvio Werner (translated by Zhiwei Zhuang), Published 11/27/2025 🇩🇪

E-ink outperforms other display technologies in certain aspects, such as making content easily readable in bright sunlight without requiring a backlight. However, it also comes with drawbacks, including generally slower response times. As a result, e-ink displays tend to shine in specific use cases. Designed as an iPhone attachment, the Reetle SmartInk I is an e-ink display that may prove useful in some scenarios. Installation is fairly straightforward, as the device attaches like a typical protective case. Furthermore, it is compatible with models ranging from the iPhone 14 to 17 and connects wirelessly via Wi-Fi or Bluetooth using an app, eliminating the need for cables.

Measuring just 3.97 inches, the screen is relatively small and offers a resolution of 480 x 800 pixels. Beyond e-books, it can display various types of information, including QR codes and boarding passes. With the press of a button, users can also record voice memos and have them transcribed and summarised by AI. Powering the device is a 300 mAh battery that promises up to 10 hours of use. A wireless charger is also included in the box.

The Reetle SmartInk I is currently seeking funding on Kickstarter, with prices starting at around $120. Backers can expect shipments to begin in February 2026 if all goes according to plan. As with similar crowdfunding campaigns, this project carries inherent financial risks for backers. Notably, this is the first Kickstarter project launched by the company Reetle.

Source(s)

Kickstarter

Loading Comments

Comment on this article

Garmin highlights tools to help man...

Viral Haribo power banks delisted w...

Editor of the original article: Silvio Werner - Senior Tech Writer - 15876 articles published on Notebookcheck since 2017

I have been active as a journalist for over 10 years, most of it in the field of technology. I worked for Tom’s Hardware and ComputerBase, among others, and have been working for Notebookcheck since 2017. My current focus is particularly on mini PCs and single-board computers such as the Raspberry Pi – so in other words, compact systems with a lot of potential. In addition, I have a soft spot for all kinds of wearables, especially smartwatches. My main profession is as a laboratory engineer, which is why neither scientific contexts nor the interpretation of complex measurements are foreign to me.

contact me via: silvio39191, LinkedIn

Translator: Zhiwei Zhuang - Translator - 503 articles published on Notebookcheck since 2022

After graduating with a bachelor’s degree in environmental engineering, I moved from Singapore to Cologne in 2014 and began pursuing a career as a freelance translator. Much of my translation work focuses on science, engineering and technology. My fascination with computers and mobile electronics began when I was young. And I have fond memories reading countless tech and gaming magazines. Working with Notebookcheck gives me the opportunity to incorporate my personal interests into my professional work.

Please share our article, every link counts!