
FBReader
Amazon Kindle
Sumatra PDF
Okular
Calibre Web
KOReader
Google Play Books
Ebook manager, viewer & converter

NovoPsych
Clinical assessment tools for psychologists, therapists and occupational therapists. Send measures by secure link and review scored results, severity bands and reports.

Which is more popular?
Based on our record, calibre seems to be more popular. It has been mentioned 555 times since March 2021.
Website, pricing, platforms and company facts side by side.
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In their own words, as submitted to SaaSHub.


No description of calibre yet.
Clinical assessment tools for psychologists, therapists and occupational therapists. Send measures such as the PHQ-9, GAD-7 and DASS-21 by secure link and get scored results, severity bands and reports ready to review. The catalogue also includes DSM-5 ADHD assessments and autism screening tools....
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Why I Stopped Watching Calibre on Netflix in 10 Minutes! | Flick Connection Podcast Clip (Ep. 11)
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing calibre and ClientForms.app.
ClientForms.app's answer:
Frontend: Next.js 15 (React 19), Tailwind CSS Backend: Supabase (PostgreSQL, Row-Level Security) Authentication: Clerk Payments: Stripe Hosting: Vercel (Sydney region) Database hosting: Supabase (Australian data residency)
ClientForms.app's answer:
Psychologists who assess ADHD and autism. Typically private practice, solo or small group (1-5 clinicians), currently using paper forms and spending hours on admin per assessment. They want something that works and is secure.
ClientForms.app's answer:
Neurodivergent-first design. Most digital forms just replicate paper online. ClientForms is built specifically for ADHD and autism patients - progress bars with time remaining (helps with time blindness), softer colours instead of harsh white, sticky headers so you always know where you are. The forms are designed to reduce anxiety and improve completion rates.
ClientForms.app's answer:
Most clinical software treats patients as an afterthought. ClientForms is designed specifically for neurodivergent users who are filling out the forms, progress indicators, time estimates, calmer colours, predictable layouts. One link, no signup required, works on any device. Patients just open and complete.
Share your experience with using calibre and ClientForms.app. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


If you are looking for the best eBook reader for your PC, you can try Calibre. It is a user-friendly and useful eBook managing tool that is a must-have for every reader. Besides being completely open-source and free,...
Calibre is one of the most popular eBook apps for Linux. To be honest, it’s a lot more than just a simple eBook reader. It’s a complete eBook solution. You can even create professional eBooks with Calibre.
The Calibre ebook reader is one of the best ebook management tools to help you read and organize your entire library. Calibre is portable and cross platform, so it’s available on nearly every device you own.
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Recommendations tracked on public social media and blogs since March 2021.


Lumink is free and open source, for macOS 14 or later, on Apple Silicon and Intel. The interface is in English and Portuguese. To convert text books, you need Calibre installed. Ocrmypdf is optional. - Source: dev.to / 1 day ago
It'd be awesome if kitty[1] and calibre[2] adopted the Blender UI. [1] https://github.com/kovidgoyal/kitty [2] https://calibre-ebook.com/. - Source: Hacker News / 7 days ago
Calibre lets you put non-Amazon eBooks on these very same devices. It made me start using my old Kindle again: https://calibre-ebook.com/. - Source: Hacker News / 7 months ago
Tracking ClientForms.app since Dec 2025.
When comparing calibre and ClientForms.app, you can also consider the following products.

FBReader is an e-book reader for various platforms. Features:
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NovoPsych is a tool that is used for outcome monitoring via conducting psychological tests online.
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Amazon Kindle software lets you read ebooks on your Kindle, iPhone, iPad, PC, Mac, BlackBerry, and...
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Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
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Okular is a universal document viewer based developed by KDE.
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Calibre Web is a web app providing a clean interface for browsing, reading and downloading eBooks...
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