Calculator - Hide Photo Vault

Calculatie is a modern scientific calculator app designed to feel fast, simple, and powerful for everyday use. Whether you are solving quick school equations, checking business numbers, or doing advanced scientific calculations, Calculatie gives you a clean interface with reliable results and useful extra tools in one app.

The app supports all core calculator actions you expect: addition, subtraction, multiplication, division, percentages, decimal input, clear/backspace controls, and instant equals evaluation. It also includes scientific functions for more advanced needs, such as sin, cos, tan, log, ln, square root, power, pi, e, and factorial. As you type, Calculatie can preview results in real time, helping you catch mistakes earlier and calculate faster.

Calculatie is optimized for both portrait and landscape orientation. In portrait mode, it remains easy to read and quick to tap with a balanced button layout. In landscape mode, the app provides a wider workspace for scientific usage and smoother multi-step input. Text auto-scaling keeps long expressions readable, and output formatting improves clarity for larger numbers. For convenience, you can also long-press the result to copy it to clipboard.

Beyond standard math features, Calculatie includes theme and background customization so the app looks the way you want. You can switch styles and personalize the visual experience while keeping controls familiar and efficient. This makes the calculator practical for daily use while still feeling personal.

A unique built-in feature is the hidden Vault flow. When a specific code pattern is entered (`1234`) and confirmed with `=`, Calculatie triggers vault access logic. In this release, vault opening includes a rewarded-ad gate. This means users complete a rewarded interaction before vault access continues. The vault function is integrated discreetly within normal calculator behavior and is intended for users who want a private utility flow inside the app experience.

Key features:
- Fast and responsive scientific calculator
- Full basic operations (+, -, x, /, %, decimals)
- Advanced math functions (sin, cos, tan, log, ln, sqrt, power, pi, e, factorial)
- Real-time calculation preview while typing
- Smart expression display and readable formatted results
- Portrait and landscape support
- Theme and background customization
- Clipboard copy for results
- Hidden `1234` vault trigger flow


Calculatie is built to be practical, stable, and easy to use. The goal is to deliver a reliable all-in-one calculator that works for both simple daily math and advanced expressions, while also offering unique hidden utility behavior for users who want more than a typical calculator app.

Recent changes:
Improved Secret Vault flow with better ad-loading handling.
Fixed landscape delete/backspace button label issue.
Improved portrait layout spacing so calculator UI remains usable with top banner.
Updated launcher icon and adaptive icon resources.
Fixed Bug