COSTRA is a set of calculators for production. Work out the cost of a batch and the price of woven polypropylene bags, and send the result as PDF, JPEG or DOCX on your company letterhead.

FREE
• Cost calculator: unlimited materials (weight in grams or kilograms, price per kg) and production expenses, margin in percent. The margin is folded into the material and expense amounts, so everything adds up to the cent.
• Bag calculator: area and weight of one bag from its size and fabric density, price per unit, per kilogram and per ton; two price input modes. Up to 5 calculations per session.
• Your own material and expense categories, duplicate categories.
• English and Russian interface, light and dark themes, report header text.

COSTRA PRO (one-time purchase, no subscription)
• Calculation history and templates with a name and description: load recurring calculations with one tap.
• Material catalog: polypropylene, polyethylene, confectionery materials, fabrics, building materials. Add a whole folder or a single material to your categories and edit the name: size, colour, grade, brand.
• Share as PDF, JPEG or DOCX in two layouts: a table with the calculation data, or an invoice with number, description, unit, quantity and total.
• Your logo, company letterhead, letterhead margins and e-mail subject: set once for both calculators.
• Edit the totals before sending, for example to round them.
• Import and export of history, templates and materials, with a choice of what to move.
• Bag calculator: up to 50 calculations per session.
You can restore the purchase on another device with the same Google Play account.

PRIVACY
The app works offline (the network is used only to buy PRO). Your data stays on your device. No sign-up, no ads.