LemonInk

Develop by Shopify

Free plan available

Ebook Sales & Watermarking (EPUB, MOBI and PDF)

Automated delivery

Secure ebook hosting

Customizable watermark

Digital signature

Store integration

About LemonInk

Launched Feb 01, 2021

Built by Shopify

Address

2817 Eagandale Blvd, Eagan, MN, 55121, US

Website Support Portal Privacy policy Tutorial FAQ Document

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Description

LemonInk lets you sell ebooks through your store. And secure them using social-DRM/watermark.

Book publishers and authors can can benefit from selling their books directly to customers. Thanks to LemonInk it's possible to do that with ebooks as well. LemonInk will securely host and manage your ebook files and allow you to match them with products in your store. Whenever a customer buys an ebook, we'll create a unique copy, digitally signed with their data - both visibly and invisibly. Files are delivered to customers automatically through download links in order details.

Great support (email us!)
Customize the watermark so it's just perfect
Security: your ebooks are never shared without unique digital signature

Pros

Ebook sales are facilitated directly to customers, bypassing third-party platforms
Secure hosting and management of ebook files
Ability to match ebook files with products in a store
Unique copies of ebooks are created with both visible and invisible digital signatures for customer identification
Automatic delivery of ebooks to customers through download links in order details
Great customer support available via email
Simple pricing model: pay per sale with no additional fees
Customizable watermark options to fit specific needs
Enhanced security as ebooks are never shared without a unique digital signature

Cons

Reliance on the app's security measures for ebook protection
Potential challenges in integration with various e-commerce platforms
Limited mention of cross-platform compatibility and detailed usage metrics
Dependence on email support might not be ideal for all users requiring instant help
No mention of support for other ebook formats beyond EPUB, MOBI, and PDF

Top Helpful Reviews

How To Cook Portuguese Stuff

Dec 01, 2025 on Shopify

This is perfect for our digital cookbooks! Easy install and customer service is fantastic. The buyer receives a beautiful PDF with watermark right away to their inbox. Thank you again!

Honford Star

Oct 21, 2025 on Shopify

Lemonink has suited our needs perfectly and every single step of installation was straightforward. Support has been great too.

東洋館出版社

May 18, 2023 on Shopify

We started using lemonink to sell our e-books. We were able to batch map a large number of e-books from support, which was very helpful because we were able to sell e-books immediately and not lose any opportunities!

Atelier Milky

Aug 31, 2022 on Shopify

We are really happy with LemonInk which answers perfectly our needs in terms of protection for our digital products. Moreover, the team is super helpful and answered quickly to our questions. Definitely recommend !

www.skyshelf.eu

Jul 20, 2022 on Shopify

We are specialized in aviation ebooks and had some very accurate requirements. We were looking for: - storage of several ebook formats (pdf, epub, mobi); - capability to download several files in one single product purchase; - capability to link an ebook to several products (in various languages); - automatic watermarking; - a "pay as you download" formula, instead of a "pay as you upload". We found that, plus the pleasant feeling of talking to somebody who really wants to help you (and not send you to a FAQ page ... ) and establish a partnership. We had some feedback with our first customers who told us that they were happy with the system and that it works smoothly. The system is still young and needs a bit of "polishing" on the user interface side, but they are working on it and it's nice to see the improvements. Conclusion #1 : "Thank you Piotrek." Conclusion #2 : Lemonink is definitely worthwhile to give it a try. Yves www.skyshelf.eu

SAADA Spotlight

Jan 31, 2022 on Shopify

The LemonInk team are terrific to work with. This app works exactly as described and is a low-cost way to include social drm protection for digital items. We wanted a few customizations to how the app works and where the watermark is placed and Piotrek from LemonInk helped us every step of the way. He is incredibly responsive to questions and requests and just really nice. I highly recommend this app.

Qualum Publishing

Jan 13, 2022 on Shopify

LemonInk proved to be precisely what we needed for content delivery of ebooks to customers. The instructions are straightforward, and the watermarking service (which is fully customisable) is a bonus.

Yoga & Meditation shop

Apr 02, 2021 on Shopify

Works as advertised. Had some initial issues with setup but the developers were quick to provide a solution.