Planned Experiment
Design of Experiments tool
Free · In‑App Purchases
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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Math typography across the app: matrix headers, coefficient names, criterion hints. Stability fixes.
The developer, Ilya Obraztsov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Ilya Obraztsov
- Size
- 7.4 MB
- Category
- Productivity
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Full version $17.99
- Copyright
- © 2026 Ilya Obraztsov