
Gumroad
WooCommerce
PrestaShop
Thirty Bees
Sellfy
Payhip
OpenCart
Sell.app is the easiest way to sell digital products online. Spin up your own storefront in just a few minutes and start selling instantly.

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, Sell.app seems to be more popular. It has been mentioned 3 times since March 2021.
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | sell.app | clientforms.app |
| Pricing | ||
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Sell.app 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 Sell.app 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 Sell.app 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 Sell.app 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.


The shop is powered by sell.app so the website itself does not seem malicious. - Source: dev.to / over 2 years ago
SellApp is a simple way to sell digital products online. A digital goods seller can spin up a storefront in less than a minute and start selling instantly, while we automatically take care of all the difficult parts — delivery, checkout,... Source: about 5 years ago
We launched SellApp a couple months ago and got a ton of feedback from hundreds of sellers. We're now at the stage where they're pretty satisfied, so we thought we'd put the product out there and see what else we could improve. Source: about 5 years ago
Tracking ClientForms.app since Dec 2025.
When comparing Sell.app and ClientForms.app, you can also consider the following products.

An all-in-one solution to sell your work and grow your audience.
Compare Gumroad to Sell.app or ClientForms.app:

NovoPsych is a tool that is used for outcome monitoring via conducting psychological tests online.
Compare NovoPsych to Sell.app or ClientForms.app:

A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.
Compare WooCommerce to Sell.app or ClientForms.app:

Create your online store with PrestaShop's free shopping cart software. Build an ecommerce website for free and start selling online with hundreds of powerful features.
Compare PrestaShop to Sell.app or ClientForms.app:

Open e-commerce platform designed to work out of the box.
Compare Thirty Bees to Sell.app or ClientForms.app:

Sellfy is an easy to use but powerful e-commerce platform where you can sell digital, print on demand or subscription products. Use a Sellfy storefront to create a beautiful online store or embed a Sellfy shopping cart to your own website.
Compare Sellfy to Sell.app or ClientForms.app: