K

Shopify custom file upload app by Kaktus·Let visitors quickly view or download PDF catalogs and convert any PDF to flipbook to engage users.

Snapshot

5.00(5 reviews)#43of 147 inCustom file upload

Ongoing.AI tracks K daily — category rank, keyword positions in App Store search, install footprint, listing changes, and reviewer sentiment — back to when we first observed the listing.

Rating

5.00

5 reviews

Pricing

From $0/mo

freemium

Built for Shopify

No

Years live

1

launched Oct 10, 2024

Last updated

Jul 1, 2026

Shopify listing

Category rank over time

Where K sits day-by-day in Custom file upload.

Position across the Custom file upload page, snapshot daily. Lower is better — the Y axis is inverted so the strongest ranks sit at the top of the chart. Open the full Custom file upload leaderboard →

#44#51#57#64#70May 28May 31Jun 4Jun 7Jun 11K · #54WellnessPay HSA/FSA App · #53VisioncarePro · #55
Best position observed: #45. K slipped 6 positions over the window. Greyed lines: the apps sitting immediately around it on the latest snapshot.

Catalog position

Where K sits in the App Store.

Rank and percentile inside the Custom file upload category — the competitive shape of the niche around this app.

Rank in Custom file upload

#43

of 147 active apps

Review count percentile

71th

vs category siblings

Rating percentile

77th

vs category siblings

Years on App Store

1

since 2024

Listing change cadence

What K has changed lately.

Every pricing tweak, tagline refresh, and Shopify-side listing ping. Captured from Ongoing.AI’s per-scrape diff log — the cadence and the content of changes, in one strip.

Listing changes · last 21 days+20shopify_lastmod: 2026-06-12 → 2026-06-13shopify_lastmod: 2026-06-13 → 2026-06-15shopify_lastmod: 2026-06-15 → 2026-06-16shopify_lastmod: 2026-06-16 → 2026-06-18shopify_lastmod: 2026-06-18 → 2026-06-25shopify_lastmod: 2026-06-25 → 2026-06-27shopify_lastmod: 2026-06-27 → 2026-06-28shopify_lastmod: 2026-06-28 → 2026-06-30shopify_lastmod: 2026-06-30 → 2026-07-01Jun 13, 26Jun 23, 26Jul 4, 26

Shopify Lastmod · Jul 2

2026-06-30 → 2026-07-01

Shopify Lastmod · Jul 1

2026-06-28 → 2026-06-30

Shopify Lastmod · Jun 29

2026-06-27 → 2026-06-28

PricingIdentity & listingCadence

Reviews

What merchants are saying

5.00(5 reviews)
  • 100%positive6
  • 0%neutral0
  • 0%negative0

Top themes

    What merchants praise

    Very good customer relations, always solved my problem in secs. App is also very useful. Would recemmend it.
    Novojenus · 5 · 2025-01-19

    Plans

    K pricing tiers.

    Free

    Free to install

    • Unlimited PDF Files & Catalogs
    • Grid, List & File Viewer Display
    • Drag & Drop PDF File Management
    • Customizable Design
    • Pre-Made Templates
    • Multiple PDF Icon Styles
    • Mobile Optimized
    • Knowledgeable Support

    Premium

    $0.01/month

    • Unlimited PDF Files & Catalogs
    • Grid, List & File Viewer Display
    • Drag & Drop PDF File Management
    • Customizable Design
    • Pre-Made Templates
    • Multiple PDF Icon Styles
    • Mobile Optimized
    • Knowledgeable Support

    Capabilities

    What K:PDF Viewer, Flipbook+Catalog can do.

    The 6 capabilities K:PDF Viewer, Flipbook+Catalog lists across its category, in Shopify’s own taxonomy. Pulled directly from the App Store listing.

    File types

    1
    • PDF

    File management

    5
    • Add text
    • Custom font
    • Templates
    • Preview
    • File download

    FAQ

    K:PDF Viewer, Flipbook+Catalog — frequently asked questions.

    What is K:PDF Viewer, Flipbook+Catalog on Shopify?
    K:PDF Viewer, Flipbook+Catalog is a Shopify app in the Custom file upload category. Improve the customer experience with fast PDF file manager. PDF Viewer lets you display documents in a clean, branded layout. Embed and organize PDFs on product pages or across your store in minutes. PDF Viewer supports grid or list layouts, file previews, and one-click file downloads. Customize the layout to match your brand, and enjoy smooth performance across all devices. Set up in minutes and enhance the shopping experience with seamless PDF access. It averages 5.00 out of 5 across 5 merchant reviews on the Shopify App Store.
    How much does K:PDF Viewer, Flipbook+Catalog cost?
    K:PDF Viewer, Flipbook+Catalog offers a free plan and a single paid plan at $0/month. The free plan includes Unlimited PDF Files & Catalogs, Grid, List & File Viewer Display, Drag & Drop PDF File Management, and Customizable Design. The paid plan unlocks advanced features like additional integrations, automations, and deeper customization.
    When was K:PDF Viewer, Flipbook+Catalog launched?
    K:PDF Viewer, Flipbook+Catalog launched on October 10, 2024 — over 1 year on the Shopify App Store. In that time it has gathered 5 merchant reviews.
    Is K:PDF Viewer, Flipbook+Catalog Built for Shopify?
    K:PDF Viewer, Flipbook+Catalog does not currently carry Shopify's Built for Shopify badge. The badge is awarded to apps that meet Shopify's published standards for performance, ease of use, and merchant value — many high-quality apps operate without it.
    What are the best K:PDF Viewer, Flipbook+Catalog alternatives?
    Merchants commonly compare K:PDF Viewer, Flipbook+Catalog with OPTIS Product Options, Variant, SC Product Options, Hulk Product Options, and Teeinblue Product Personalizer. Each alternative covers a similar use case but differs on pricing model, integration depth, and the specific themes merchants praise in reviews — see the alternatives section above for a side-by-side.

    Methodology

    Where the numbers come from.

    Ratings, review counts, pricing tiers, “Built for Shopify”, launch date, and category memberships come from the live Shopify App Store listing — refreshed daily by Ongoing.AI’s crawler. The review-count trajectory is the diff between today’s snapshot and snapshots from 7 and 28 days ago. Topic counts and sentiment come from the review corpus, topic-tagged with Claude. Install footprint is observed via Ongoing.AI’s tech-detection pass against actively-tracked Shopify storefronts. Catalog position is computed at snapshot time against every active app sharing the primary category. Snapshot generated .

    Find every brand running K.

    Ongoing.AI tracks every Shopify brand’s app stack daily. Pull the full install list, filter by vertical or geography, and catch the moment merchants install — or churn off.

    Prefer the source? View K on the Shopify App Store ↗