PolyPDF vs Vector Flow

PolyPDF brings drawing-set review and PDF markup to iPad and iPhone. Open plans from Files, move between pages, measure to scale, add markups, and save your work back to a PDF. Built for AEC work • Review multi-page plan sets with thumbnails and tabs. • Measure lengths and areas using a calibrated scale. • Add callouts, clouds, shapes, stamps, and freehand markup. • Count symbols and organize findings in the Markup Table. • Export or share the finished PDF. Your documents remain in the locations you choose in Files. PolyPDF supports an optional Pro purchase for advanced tools; the app shows which features require Pro before purchase. PolyPDF is also available on Mac. Visit polypdf.com for details and support.

**Vector Flow** is a vector drawing and animation app that lets you sketch shapes and strokes, bring them to life with a full keyframe timeline, and export to the formats your project needs. ## DRAW • Pen, line, and Bézier tools for freehand and precise paths • Rectangle (with adjustable corner radius), oval, and circle shapes • Bucket fill and eraser • Variable-width strokes with editable thickness along the path • Edit paths by moving nodes and control points, including full 360° editing on circles • Convert circles into editable arcs and restore them at any time • Merge multiple shapes into a single path • Undo, redo, and multi-select support ## ANIMATE • Full keyframe timeline for creating smooth animations • Animate position, rotation, scale, color, corner radius, path shape, and arc properties • Record gestures directly into keyframes while editing • Onion skinning for frame-by-frame animation • Scrub, preview, loop, and define a custom work area ## IMPORT & EXPORT • Export static artwork as SVG and Vector Drawable files • Export animations as Lottie JSON and Animated Vector Drawable (AVD) files • Export images as PNG and JPG • Import previously exported Lottie and AVD files for further editing • Save and reopen projects using Vector Flow project files A one-time purchase unlocks export features permanently on your device. No subscription required. Whether you're creating icons, UI animations, illustrations, or quick vector sketches, Vector Flow brings drawing and animation together in a single, streamlined workspace.