Sigma - GPA Calculator
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About this app
The Σ in your GPA, calculated correctly.
Sigma is the GPA calculator built for college students who need accurate, credit-weighted grade tracking. Unlike other grade calculators that simply average your grades, Sigma uses the real formula — weighting each course by its credit hours. Set up per-class grading scales, track assignments, and always know your real GPA.
★ ACCURATE GPA CALCULATIONS
The only grade calculator that gets credit-hour weighting right.
• Credit-weighted GPA — a 4-credit course impacts your GPA more than a 1-credit course, just like your transcript
• Per-class grading scales — set A/B/C or A+/A/A- independently for each course
• Semester and cumulative GPA — view your GPA by term or across your entire college career
• Real-time updates — your GPA recalculates instantly as you enter grades
★ COMPLETE GRADE TRACKING
Everything you need to track grades and plan ahead.
• Weighted categories — set up Exams (40%), Homework (30%), Labs (30%) with custom weights
• Assignment tracking — log every quiz, exam, and homework with points earned and possible
• "What Do I Need?" calculator — find out exactly what score you need on your final to hit your target grade
• Drop lowest — automatically exclude your lowest scores, just like your professor does
★ BUILT FOR STUDENTS
Designed around how students actually use a grade tracker.
• 6 classes free — enough for a full semester, no paywall on day one
• Works offline — no internet required, your grades are stored locally on your device
• Private by design — no data collection, no location tracking, grades stored locally
• Material Design — clean, modern interface that fits right in on Android
★ PRICING
FREE:
• Up to 6 classes with full grade tracking
• Credit-weighted GPA calculator
• Per-class grading scales
• "What Do I Need?" calculator
• Unlimited assignments and categories
PREMIUM SUBSCRIPTION
Sigma Premium unlocks all features:
• Premium Monthly: $4.99/month
• Premium Annual: $29.99/year (Save 50%) — includes 7-day free trial
Premium adds unlimited classes, home screen widgets, custom themes, PDF/CSV export, and advanced "what if" scenarios.
Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Manage subscriptions in Google Play Store → Account → Subscriptions.
Privacy Policy: https://sigma.bulpara.com/privacy
Terms of Service: https://sigma.bulpara.com/terms
Sigma is the GPA calculator built for college students who need accurate, credit-weighted grade tracking. Unlike other grade calculators that simply average your grades, Sigma uses the real formula — weighting each course by its credit hours. Set up per-class grading scales, track assignments, and always know your real GPA.
★ ACCURATE GPA CALCULATIONS
The only grade calculator that gets credit-hour weighting right.
• Credit-weighted GPA — a 4-credit course impacts your GPA more than a 1-credit course, just like your transcript
• Per-class grading scales — set A/B/C or A+/A/A- independently for each course
• Semester and cumulative GPA — view your GPA by term or across your entire college career
• Real-time updates — your GPA recalculates instantly as you enter grades
★ COMPLETE GRADE TRACKING
Everything you need to track grades and plan ahead.
• Weighted categories — set up Exams (40%), Homework (30%), Labs (30%) with custom weights
• Assignment tracking — log every quiz, exam, and homework with points earned and possible
• "What Do I Need?" calculator — find out exactly what score you need on your final to hit your target grade
• Drop lowest — automatically exclude your lowest scores, just like your professor does
★ BUILT FOR STUDENTS
Designed around how students actually use a grade tracker.
• 6 classes free — enough for a full semester, no paywall on day one
• Works offline — no internet required, your grades are stored locally on your device
• Private by design — no data collection, no location tracking, grades stored locally
• Material Design — clean, modern interface that fits right in on Android
★ PRICING
FREE:
• Up to 6 classes with full grade tracking
• Credit-weighted GPA calculator
• Per-class grading scales
• "What Do I Need?" calculator
• Unlimited assignments and categories
PREMIUM SUBSCRIPTION
Sigma Premium unlocks all features:
• Premium Monthly: $4.99/month
• Premium Annual: $29.99/year (Save 50%) — includes 7-day free trial
Premium adds unlimited classes, home screen widgets, custom themes, PDF/CSV export, and advanced "what if" scenarios.
Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Manage subscriptions in Google Play Store → Account → Subscriptions.
Privacy Policy: https://sigma.bulpara.com/privacy
Terms of Service: https://sigma.bulpara.com/terms
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
What’s new
Welcome to Sigma — the GPA calculator that finally gets credit hours right.
• Credit-weighted GPA calculations (not simple averages)
• Per-class grading scales (A/B/C or A+/A/A- per course)
• Weighted grade categories (Exams, Homework, Labs)
• "What Do I Need?" calculator for target grades
• Semester and cumulative GPA tracking
• 6 classes free — enough for a full semester
Your grades. Calculated correctly.
• Credit-weighted GPA calculations (not simple averages)
• Per-class grading scales (A/B/C or A+/A/A- per course)
• Weighted grade categories (Exams, Homework, Labs)
• "What Do I Need?" calculator for target grades
• Semester and cumulative GPA tracking
• 6 classes free — enough for a full semester
Your grades. Calculated correctly.
App support
About the developer
Wikivec, Inc.
support@wikivec.com
1111B S Governors Ave Ste 7867
Dover, DE 19904-6903
United States
+1 302-244-7217
