Calculator Note Vault is a secret calculator vault app: it looks and works like a normal calculator, but behind it sits a private, encrypted vault to hide photos, hide videos, keep secret notes and lock private files. It is also a full calculator with notes, a budget calculator, a scientific calculator and a set of free math tools. Every tool is free; Premium only removes the small ad banner.

★ NEW: English or Indonesian
Pick the app language in Settings and the whole app switches at once.

• SECRET CALCULATOR VAULT – HIDE PHOTOS, VIDEOS & NOTES
Tap the calculator title three times and enter your password to open the hidden vault. Nobody sees more than a calculator.
- Encrypted Note: secret notes, private diary, checklists and images behind a password
- Hidden File: hide photos, hide videos and documents in a private photo vault. Important: when you hide a file, an encrypted copy is saved and checked first, then the original is deleted from your gallery or folder
- Shared Content: share photos, videos and links from any app straight into the vault and sort links into playlists
- Private reminders: the notification shows only the text you choose
Privacy & security: biometric unlock, auto-lock when you leave the app, screenshot blocking, optional intruder photo, panic exit (turn the phone face down), a disguised app icon to hide the app, and an encrypted backup file you keep yourself. There is no password recovery, so remember your password.

• MATH NOTES – CALCULATOR WITH NOTES & BUDGET TRACKER
Write calculations line by line like a notebook calculator. Add labels, headings and subtotals, and keep running totals. Understands 50rb, 5jt and Rp500.000. Mark a line as money out with +/− and see In, Out and Balance, perfect for a daily budget, expense tracker, shopping list or small business sales. Swipe a line left to delete it. Export to TXT, CSV, DOCX or PDF.

• FORMULAS & CASH LOG – MONEY IN, MONEY OUT
Ready-made finance calculators: loan and installment calculator, stacked discount calculator, split bill calculator, VAT / tax calculator, margin and markup calculator, break-even calculator, salary and overtime calculator, BMI calculator and more, or build your own formula. Record any result in the Cash Log to track money in and money out, with monthly totals and CSV export.

• FREE MATH TOOLS
Scientific Pro with exact algebra and a step-by-step equation solver, scan a math problem with the camera, graphing calculator, statistics calculator, programmer calculator (hex, binary, decimal), date and time calculator, matrix calculator, complex numbers, and a savings and loan growth chart.

• SCIENTIFIC CALCULATOR, UNIT & CURRENCY CONVERTER
Basic calculator and scientific calculator with powers, roots, logarithms and trigonometry, fraction answers, and calculation history with notes. A live unit converter (length, weight, area, temperature, speed, data, time) and currency converter work right inside the calculator.

• CONSTRUCTION & LANDSCAPE ESTIMATORS
Concrete calculator, paint calculator and flooring / tile calculator for home projects, plus soil, mulch and plant spacing calculators for the garden.

Great for: anyone who wants a hidden photo vault that looks like a calculator, students who need a scientific calculator and equation solver, sellers who track daily sales and expenses, and families splitting bills or planning a monthly budget.

Your data stays on your device. The free version shows one small banner ad; Premium removes it. Download Calculator Note Vault: the calculator that keeps your secrets.