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Smallpdf
PDF Expert
iLovePDF
Read, review, and annotate PDFs with ease

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, PDF Viewer seems to be more popular. It has been mentioned 3 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | pdfviewer.io | clientforms.app |
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In their own words, as submitted to SaaSHub.


No description of PDF Viewer 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.


No analysis of PDF Viewer yet.
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing PDF Viewer 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 PDF Viewer and ClientForms.app. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


I like the simplicity of PDF Viewer https://pdfviewer.io/. Source: almost 4 years ago
And where I just want a clean, no subscription required PDF viewer that has consistent annotation tools, I use PDF Viewer (macOS, iOS/iPadOS): https://pdfviewer.io. Source: over 4 years ago
Mac OS X 10.7 Lion: the Ars Technica review | Ars TechnicaRevert changes to PDFs and images in Preview on Mac - Apple SupportTitlebar Renaming (Screenshot)General Preference Pane (Screenshot)Pixelmator ProAcorn 7PDFpenPDF... Source: over 4 years ago
Tracking ClientForms.app since Dec 2025.
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