DropAsset

Stop redrawing the same diagrams. DropAsset floats a small bubble over any app: open it, pick a drawing, and drag it into Obsidian, Samsung Notes, or any notes app that accepts dropped images. A simple tap copies it instead.

FREE PLAN

• 270 clean vector drawings for engineering and science: resistors, transistors, transformers, op-amp circuits, meters, logic gates, flip-flops, lenses, lab glassware, molecules, cells, organs, a labeled human skeleton, geometry, flowcharts, UML, and data structures.
• Plot generator: Type LaTeX and get Cartesian, implicit, parametric, and polar curves, 3D surfaces, and contour maps. Roots, extrema, intersections, the area under a curve, and tangent lines are marked for you.
• Formula typesetter: Renders anything LaTeX can write.
• Logic designer: Truth tables with minterms and maxterms, Karnaugh maps, and circuits simplified to sum of products or product of sums.
• Venn diagrams: Generated from set notation, for up to three sets.
• Blank tables: Available in any size and style.
• Your own pictures: Scan a whiteboard or import SVGs and photos, crop and rotate them, and trace them into clean ink. The free plan includes up to 10 imports.

PRO PLAN

• Unlimited pictures: Import and trace as many of your own images as you need.
• 12 AI styles: Redraw a photo of your board into clean notes, line art, sketchnotes, watercolor, blueprints, chalkboards, and more.
• AI background removal for busy photos.
• 113 additional drawings: Chip pinouts, relays, optocouplers, electrical safety signs, mechanics and free-body diagrams, fields, vectors, and network diagrams.
• Pro is available as a monthly subscription or a one-time lifetime purchase.

MADE FOR NOTES

• Universal formats: Everything is a vector (SVG), with a PNG fallback for apps that only take standard images.
• Four inks: Black, blue, red, and white (perfect for dark-mode notes).
• Offline ready: The library lives on your phone and works offline. Note: Tracing and AI tools require an internet connection.
• Bilingual search: Find exactly what you need by searching in English or Spanish.

DropAsset is currently in beta, and new drawings arrive with updates. Tell us what you need next at the contact email below.

Recent changes:
• New "What's new" board (⋮ → What's new): what each update fixed, with short animations, and news from the team.
• Your work comes back: an open plot, board or diagram returns if Android closes the app.
• Pasting long formulas or labeling board parts no longer closes the app.
• Pro renews reliably from Google Play, and slow payments are kept.
• Clearer messages, and screens that fit large text and landscape.
• The bubble keeps its place when you turn the phone.
• A new app icon.