LDT Digital Downloads & Ebooks vs Stampfox ‑ Sell PDFs
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 9, 2026 for LDT Digital Downloads & Ebooks, Oct 22, 2026 for Stampfox.
The short answer
- Both list a free plan. Paid plans start at $8.99/month for LDT Digital Downloads & Ebooks and $5/month for Stampfox.
- LDT Digital Downloads & Ebooks lists 16 features Stampfox’s listing doesn’t mention, including Amazon S3 storage, Analytics, Audio.
Head to head
- United States
- Germany
- Canada
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
- · 500MB Storage - 30 orders/month
- · Add your brand, your own email sender
- · Automatic download email, Thank You page
- · Find Digital Order Form, Download by URL
- · Order Status, Customer Account page
- · Require consent before access content
Starter
- · 15GB Storage
- · Automation
- · Custom Sender email
- · Download limit number/days
- · License Notification
- · PDF / EPUB watemarking
Enterprise
- · 300GB Storage
- · API endpoints
- · Check Fraudulent, IP limitation
- · Media player, PDF/E-book online reader
- · PDF password encryption
- · PRIORITY support
Ultra
- · 1TB(1024GB) Storage
- · API endpoints
- · DEVELOPER support
- · ENTERPRISE+
- · Media player, PDF/E-book online reader
- · NO EXTRA FEE
Free
- · 1 document
- · 2 MB max file size
- · 20 orders/month
- · Stampfox branding on download page
- · Unlimited downloads per order
Starter
- · 1 document
- · 1 text stamp and 1 image stamp component
- · 10 MB max file size
- · Access downloads in checkout
- · Download page on your store
- · Download tracking
Growth
- · 10 documents
- · 40 MB max file size
- · Everything in Starter
- · Priority support
- · Unlimited orders & downloads
- · Unlimited stamp components
Business
- · 100 documents
- · 60 MB max file size
- · Everything in Growth
- · Multiple language support
- · Priority support
- · Unlimited orders & downloads
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureSell any file type: PDF, ebook, video, audio, course or license key. Attach files to a product or variant and the app emails a branded download link once the order is paid. Buyers open files in your storefront portal, read or stream them in the built-in viewers, and find them again from the customer account and order status pages.
Stampfox helps Shopify merchants sell personalized and protected PDF downloads. Upload your PDF, create a stamp template with customer and order details like name, email, and order number. After purchase, customers get instant access to a personalized stamped copy.
- Attach any files and license keys to your products or variants automatically.
- Customize email template any languages, email branding, tracking email status
- Show a beautiful and customized download portal to your customer.
- Limiting downloads, adaptive stream video/audio, pdf stamping, pdf password
- Sell PDFs and deliver stamped, watermarked copies automatically after checkout
- Stamp PDFs with custom templates using text, images, and order data
- Protect PDFs. Customers never receive the original, only the stamped version
- Personalize PDFs with buyer name, email, and order details on every download
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  LDT Digital Downloads & Ebooks |  Stampfox |
|---|---|---|
| Detected stores | 107 | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Media, Apparel & Accessories, Arts & Entertainment | Not published |
| Top store countries | United States, Germany, Canada | Not published |
Reviews
| Measure | LDT Digital Downloads & Ebooks | Stampfox |
|---|---|---|
| App Store rating | 4.8 ★ | Not published |
| App Store reviews | 224 | Not published |
| New reviews, 28 days | 3 | Not enough data |
| Reviewers a year or more in | 32% | Not enough data |
Pricing
| Measure | LDT Digital Downloads & Ebooks | Stampfox |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $8.99/month | $5/month(ahead) |
| Longest free trial | 7 days | 7 days |
| Plans listed | 4 | 4 |
Listing
| Measure | LDT Digital Downloads & Ebooks | Stampfox |
|---|---|---|
| Shopify category rank | #15(ahead) | #43 |
| Shopify App Charts | #8 in Digital products | Not on this week’s charts |
| Built for Shopify | Yes | No |
| Launched | Jun 8, 2023 | May 18, 2026 |
| Languages | 24 | 1 |
| Developer | LDT Team | Engine |
FAQ
LDT Digital Downloads & Ebooks and Stampfox: common questions
- Is LDT Digital Downloads & Ebooks or Stampfox cheaper?
- Both list a free plan. Paid plans start at $8.99/month for LDT Digital Downloads & Ebooks and $5/month for Stampfox. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- LDT Digital Downloads & Ebooks lists 16 the others don’t mention, such as Amazon S3 storage, Analytics, Audio, Bulk upload. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 9, 2026 for LDT Digital Downloads & Ebooks, Oct 22, 2026 for Stampfox; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 9, 2026 for LDT Digital Downloads & Ebooks, Oct 22, 2026 for Stampfox. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.