Uncertia: Measurement Budget
GUM-Style Budgets, Offline
$0.99 · Designed for iPad. Not verified for macOS.
Replace opaque uncertainty spreadsheets with an inspectable local budget, contribution chart, expanded result, and audit-ready brief.
Uncertia is a private measurement-uncertainty budget studio for calibration technicians, metrologists, quality engineers, laboratories, educators, and technical teams that need more transparency than a copied spreadsheet formula.
Define the measurand and result, then add Type A and Type B contributors with half-width, distribution, sensitivity coefficient, evidence, and degrees of freedom. Uncertia converts each row to standard uncertainty, combines independent variance, ranks contribution, estimates effective degrees of freedom, and reports expanded uncertainty at the selected coverage factor.
KEY FEATURES
- Type A and Type B contributor ledger
- Standard, rectangular, triangular, and normal-95% conversions
- Visible divisor and sensitivity coefficient
- Combined standard and expanded uncertainty
- Variance contribution chart
- Welch-Satterthwaite effective degrees of freedom
- Editable measurand, units, result, and coverage factor
- Local uncertainty-budget PDF
- 300 original offline technical plates
- No account, ads, analytics, tracking, IAP, or subscription
Uncertia supports transparent GUM-style calculations and audit discussion. Confirm the measurement model, dependence and covariance, source distributions, divisors, sensitivity coefficients, degrees of freedom, traceability, and reporting rules with your laboratory procedure.
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The developer, Robert Corbin, 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
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Information
- Seller
- Robert Corbin
- Size
- 120.2 MB
- Category
- Developer Tools
- 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 and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Robert Corbin
