Calculator X vs Presently

Calculator X is a powerful calculator built for developers, students, and anyone who works with numbers beyond the basics. PROGRAMMER'S CALCULATOR Work seamlessly across decimal, binary, hexadecimal, and octal. Toggle individual bits directly on a 64-bit grid, perform bitwise operations (AND, OR, XOR, NOT), and watch all four bases update in real time as you type. 2D FUNCTION GRAPHING Plot any mathematical function of x instantly. Pan and pinch-to-zoom to explore the curve at any scale. Perfect for visualizing equations, finding intersections, and understanding function behavior. 3D SURFACE PLOTTING Enter any function of x and y and see it rendered as a live 3D surface. Rotate with one finger, zoom with a pinch, and pan with two fingers. Gradient coloring makes it easy to read the shape of any surface. MATRIX CALCULATOR Work with matrices up to 8×8. Perform addition, subtraction, multiplication, transpose, determinant, and inverse — all in one place. Results scroll so nothing gets cut off no matter how large your matrix is. ALL FEATURES FREE Every tool is available to every user, no subscription required.

Presently is a focus timer built around body doubling — the practice of working alongside another presence to stay grounded and on task. It's designed for people with ADHD, but works for anyone who struggles to start or sustain focus. Here's how it works: set a short intention for what you want to focus on, choose a duration, pick an ambient soundscape, and begin. The app creates a sense of shared space — like working in a coffee shop, library, or alongside a quiet companion. Soundscapes include Coffee Shop, Acoustic Café, Rain, Library, Office, and Keyboard — each designed to provide just enough background presence without distraction. No streaks. No guilt. No gamification. Just a calm space to begin working. Features: - Intention setting to clarify your focus before each session - Six ambient soundscapes with infinite looping - Pause and resume without losing your place - Session completion summary - Fully localized in 13 languages - Works on iPhone and iPad