Ambient Cafe vs Planned Experiment

Your coffee shop is always open. Ambient Cafe turns your iPhone into an immersive sound environment — a warm cafe, steady rain, crashing waves, or the hum of a moving train. Wherever you are, your perfect focus or sleep sound is one tap away. ------------------------------------------- WHY PEOPLE LOVE IT ------------------------------------------- The science is clear: the right background sound improves focus, creativity, and sleep. Ambient Cafe gives you 8 hand-crafted environments so you can find the sound that works for you — not a subscription, not a streaming playlist. Just ambient sound, always available, always yours. ------------------------------------------- 8 ENVIRONMENTS ------------------------------------------- Coffee House The warm hum of an espresso bar. The classic focus environment. Rain Steady, immersive rainfall. Block out everything else. Ocean Waves Coastal calm, wherever you are. Perfect for unwinding and sleep. Train Rhythmic motion sounds. Start your train of thought. Field Crickets, wind, and open air. Step outside without leaving. White Noise Pure, consistent sound masking. For sleep, focus, and tinnitus relief. Fountain Gentle flowing water. Calm your mind in seconds. Children Playful background energy. Fuel creative thinking. ------------------------------------------- FEATURES BUILT FOR YOU ------------------------------------------- AUTO-DUCK FOR MUSIC Playing Spotify, Apple Music, or any podcast? Turn on Auto-Duck and Ambient Cafe automatically lowers itself when your music plays — then brings itself back up when it pauses. No manual adjustment. It just works. 100% OFFLINE Every sound is stored on your device. No internet required. No buffering. Works on a plane, in the basement, at 3am with no Wi-Fi. Always. PLAYS IN THE BACKGROUND Start a sound and lock your screen. Ambient Cafe keeps playing quietly while you use other apps, read, or work. Control it from your lock screen or earphone remote. NO ADS. EVER. No banners. No pop-ups. No tracking. Ambient Cafe is a clean, distraction-free space — because that is exactly the point of the app. INDEPENDENT VOLUME CONTROL Set the ambient sound level separately from your device volume. Layer it perfectly under your music or at just the right level for sleep. WORKS WITH ANY MUSIC APP Spotify, Apple Music, YouTube Music, podcasts — Ambient Cafe layers underneath any audio you are playing.

PlanExp is a complete environment for design of experiments, ordinary-least-squares regression, and response-surface work — from the planning matrix to 2D contours, 3D surfaces, and ternary diagrams. Build a plan, enter replicate measurements, fit a polynomial model, test it, and read the optimum inside the coded cube [−1, +1]^k. Factor coding follows the classical DOE convention x = (X − X0) / ΔX. WHAT YOU CAN DO • Choose a design: one-factor grid, 2^k and 2^(k−p), Box–Draper B-D13, rotatable / face-centered / inscribed CCD, Box–Behnken, Plackett–Burman, Doehlert, 3^k, Taguchi arrays, simplex lattice for mixtures, D-optimal, Latin hypercube, and definitive screening. • Fit OLS models with main effects, two-factor interactions, and quadratic terms. Optional three-way interactions for 2^k. • Run Cochran’s C for variance homogeneity, Student’s t on coefficients, and Fisher’s F for lack of fit. See R², adjusted R², and RMSE. • Drop insignificant terms and refit. Canonical analysis locates the stationary point; a constrained search reports the best feasible point in the experimental region. • Plot response curves, filled contours, interactive 3D surfaces, and ternary (mixture) diagrams in natural units. FREE AND FULL The free version includes a one-factor grid, full factorial 2^k with up to three factors, two parallel runs, PDF reports, and JSON of your own project. Local gallery save is always free. The full version unlocks every design (including a custom matrix), up to 12 parallel runs, and CSV export — a single lifetime purchase. WHO IT IS FOR Researchers, process engineers, chemists, metallurgists, and students who plan laboratory or plant trials and need transparent classical statistics rather than a black-box optimizer. PlanExp continues the lineage of the PlanExp 2³ and PlanExp B-D13 desktop tools, rewritten for iPhone, iPad, and Mac with a shared math core.