SPC Tools: Cpk Calculator
Control Charts, AQL & OEE
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Run SPC, Cp/Cpk, control chart, AQL, OEE and Six Sigma calculations without spreadsheets. SPC Tools gives quality engineers a fast offline toolkit for manufacturing decisions on the shop floor.
Built for quality engineers, manufacturing teams, Six Sigma practitioners, inspectors and students, SPC Tools brings the most common quality calculations into one clean iPhone and iPad app.
PROCESS CAPABILITY
- Cp / Cpk process capability calculator
- Pp / Ppk process performance calculator
- Clear capability interpretation
CONTROL CHARTS
- X-bar R control charts
- I-MR individual moving range charts
- UCL, CL and LCL results
- Out-of-control point detection
MEASUREMENT & INSPECTION
- Gage R&R / MSA calculator
- AQL sampling plans based on ISO 2859-1
- Sample size calculator
MANUFACTURING PERFORMANCE
- OEE calculator
- Availability, performance and quality breakdown
- Sigma level, DPMO and yield conversion
QUALITY TOOLS
- Pareto analysis
- Histogram analysis
- FMEA with RPN priority
- Ishikawa fishbone diagram
- Hypothesis testing
- Alpha, beta and power analysis
WORK FASTER
- Save calculation history
- Review previous results
- Use the built-in formula reference
- Works offline
- No account required
- Data is processed on device
FREE & PRO
SPC Tools includes 5 free calculators. SPC Tools Pro unlocks all 15 calculators with a 7-day free trial.
Download SPC Tools and replace scattered spreadsheets with a practical quality engineering calculator built for daily manufacturing work.
Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. You can manage and cancel your subscriptions in your App Store account settings.
Privacy Policy: https://saevaexe.github.io/spctools/privacy.html
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Faster onboarding without an early paywall
• One-tap sample results for Cp/Cpk, Control Charts, and AQL
• Automatic calculation history with duplicate prevention
• Favorites from result screens and faster recent-tool access
• Contextual Pro screens with localized App Store pricing
• Smarter review prompts and a new SPC wordmark icon
The developer, Osman Seven, 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
- Osman Seven
- Size
- 14.1 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 and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 8 more
- English, French, German, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Turkish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Annual $19.99
- Monthly $2.99
- Copyright
- © 2026 Osman Seven