SyntaxFlow is the international, English-language arm of HU Ingenieros, a Madrid-based developer of business-management software since 1976. Plan Taller is its plan for glass shops and glaziers. Your price list goes on your customers’ phones as a configurator: they price a shower screen or cut-to-size glass with your prices and send you the request by WhatsApp. Quotes go to the customer as a link they read and accept. On site, the survey sheet records three widths, three heights and both diagonals per opening, with photos marked in red; the job report records the work, hours, materials and the client’s sign-off by link. The Plan Taller adds photos and files synced between phone and shop, stored in the EU. Works offline. EUR 19 a month, the first 7 days not charged. The calculators (glass weight, thickness under wind load, U-values, cutting optimizers) are free; Pro adds reports with your logo and unlimited lists from EUR 3.99 a month.