
SPC Tools: Cpk Calculator
Control Charts, AQL & OEE
0 ratings
Free
In-App Purchases
About
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/
Show more
What's New in SPC Tools
1.2.1
July 12, 2026
Refreshed localized App Store visuals, improved the Settings experience, and refined layouts across supported languages.
Subscription plans
Yearly Pro
Full access to all 15 SPC calculators - best value
$19.991 Year
7 Days trial






