# customDTF > Shopify software for DTF (direct-to-film) print shops. customDTF lets a shop's own customers > design, size, or upload DTF gang sheets directly on the store's product pages, and turns every > order into a 300 DPI print-ready file automatically — without ever creating a Shopify product variant. customDTF is a Shopify app published as "Custom DTF: Gang Sheet Builder". It is free to install. The first 10 gang sheets carry no commission; after that the fee is 4% of gang-sheet product sales per order (shipping, taxes and tips excluded), hard-capped at $500 per 30-day billing cycle, billed through Shopify's own billing. ## The three selling flows - **Gang Sheet Builder** — a drag-and-drop canvas embedded on the product page. Customers upload artwork, auto-nest it onto the sheet, clean it up (background removal, halftone conversion, AI upscaling), and add to cart at a live-calculated price. - **Transfer by Size** — customers pick a print size and quantity the way they would buy a garment. The app packs the transfers onto sheets and prices the order automatically. - **Upload Gang Sheet** — for customers who design elsewhere. They upload print-ready files up to 1 GB, pay by the inch with volume tiers, and go straight to checkout. ## What makes it technically different Most Shopify gang sheet apps create a new product variant for every custom sheet. That pollutes the catalog and analytics, eventually collides with Shopify's hard 2048-variant-per-product ceiling, and breaks later reorders when cleanup jobs delete the variants customers try to buy again. customDTF never creates a variant. Each flow sells through one permanent product, and the exact price is applied at checkout by Shopify Functions — Shopify's own native checkout pricing mechanism. Nothing is minted, nothing needs cleaning up, no variant cap can be hit, and a reorder placed months later still resolves to the correct sheet and price. ## Key pages - Homepage: https://customdtf.com/ - Gang Sheet Builder: https://customdtf.com/gang-sheet-builder - Transfer by Size: https://customdtf.com/transfer-by-size - Upload Gang Sheet: https://customdtf.com/upload-gang-sheet - Pricing: https://customdtf.com/pricing - Comparison / how to choose a builder: https://customdtf.com/compare - Free gang sheet cost calculator: https://customdtf.com/dtf-gang-sheet-calculator - Windows desktop app: https://customdtf.com/desktop - Blog: https://customdtf.com/blog - Free done-for-you setup: https://customdtf.com/setup - Contact: https://customdtf.com/contact ## Facts - Platform: Shopify (Shopify only — there is no WooCommerce, Wix, or Etsy version) - Shopify App Store listing: https://apps.shopify.com/custom-dtf-gang-sheet-builder - Launched: 9 July 2026 - Output: 300 DPI order-stamped print-ready PNG, oversized layouts split automatically into pages - Accepted uploads: PNG, JPEG, WebP across all flows, plus PDF in the builder - Sheet width follows the shop's own printer width; length is order-driven, not a fixed size list - Support: support@customdtf.com