Numbrick: Calculator & Steps press kit.

Numbrick puts two calculators in one app. The Simple calculator is the default: a big, easy-to-read display that shows how each answer was reached, step by step and in the right order, with multiplication and division before addition and subtraction. Every answer is checked twice: by undoing the last step and by a second calculation engine. Percent works the way people expect (200 + 10% = 220), and decimals are exact (0.1 + 0.2 = 0.3).

The Advanced calculator is a full scientific calculator with the key logic of a classic two-line handheld. It covers trigonometry, logs, powers and roots, fractions, memory, variables A–F and Ans, DEG / RAD / GRAD, and Norm, Fix, Sci and Eng display formats. A paper tape keeps a history of calculations that can be copied or shared, and animated guides show, key by key, how to do common tasks.

Numbrick is built to feel like a real desk calculator, with an LCD display, haptic feedback and optional key sounds. It works fully offline, needs no account, and has no ads or tracking. Calculations stay on the device.

The Simple and Advanced calculators are free. Numbrick Pro is a one-time purchase, not a subscription. It adds every step and the full check, an equation solver, statistics and regression, number bases, complex numbers, tables, unlimited tape, landscape mode, six extra skins with matching sound packs, Android home-screen widgets and the full guides library.

Numbrick is published by RedFoxApps.

• Simple calculator that shows the steps in order and checks every answer with a second engine
• Full scientific calculator with fractions, memory, variables A–F and four display formats
• Works offline, with no account, no ads and no tracking
• Paper tape history and animated key-by-key guides
• Desk-calculator feel with an LCD display, haptics, key sounds and skins
• Numbrick Pro, a one-time purchase: equation solver, statistics, number bases, complex numbers, tables, widgets and 6 extra skins