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QR Promise vs Diagram Smith

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

QR Promise compared with Diagram Smith
DetailQR Promise logo QR PromiseDiagram Smith logo Diagram Smith
What it doesQR codes that keep working forever Free online tools for flowcharts, charts, diagrams and timelines with no sign-up
StageNot given Not given
FoundedNot given Not given
Based inUS Not given
Pricing modelFree trial Freemium
PricingPro: $3/mo after 7-day free trial (card required) Free: no account required, all diagram and chart makers, PNG/SVG/PDF export, no watermark. Pro: Monthly $9.99 a month, Yearly $99.99 a year with 7-day free trial, Lifetime $239.99 once. Euro area: €10.99 a month, €109.99 a year, €259.99 once (VAT included).
Key features
  • Static QR generator for URLs, text, WiFi, vCard, email, SMS
  • PNG and SVG downloads
  • Dynamic codes with scan analytics by day, country, and device class
  • Code Health Monitor alerts for broken destination URLs
  • Migrate deactivated competitor codes
  • One-click subscription cancellation
  • Customizable colors and optional logo
  • Flowchart and process diagram maker with canvas and text-to-diagram modes
  • Text-to-diagram tools for UML, ER and sequence diagrams
  • Chart tools: pie chart, line graph, gauge and Sankey diagram
  • Automatic diagram layout from typed text
  • Export to PNG, SVG and PDF without watermark
  • Share diagrams with share links
  • Pro: editable .drawio export and vector PDF
  • Pro: multi-page documents and layers
  • Diagram checks for unlabelled branches and dead ends
  • Works on phone and computer
What makes it different
  • Static codes generated in your browser never route through servers and keep working forever after cancellation
  • Code Health Monitor checks if printed code destinations go down and emails you to fix the link without reprinting
  • Affordable pricing with no server-side kill switch on static codes after cancellation
  • Completely free with no account required and no watermark on exports
  • Nothing uploaded: all work stays on your device in your browser
  • Results computed by the same tested code, not manually typed
  • Multiple export formats: PNG at 4 sizes, SVG and PDF
  • Converts between formats: Mermaid to draw.io, SQL to ER, Visio to flowchart
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last check3 +1 (up) since last check
Trust Flow (Majestic)00
Citation Flow (Majestic)019
Referring domains (Majestic)04

5 details filled in for both companies.

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