Sigma - GPA Calculator

The GPA calculator that actually understands how college works.

Sigma is named after the Σ in the GPA formula — because we actually calculate it right. Unlike other apps that simply average your grades, Sigma weighs each course by credit hours, giving you the same GPA your transcript shows.

▸ CREDIT-WEIGHTED GPA
The formula your transcript uses, finally in an app.

• Proper weighting — your 4-credit Calculus matters more than your 1-credit seminar
• Per-class grading scales — set A/A-/B+ or A/B/C for each course independently
• Semester and cumulative GPA — track both, see the breakdown
• Real-time updates — your GPA recalculates as you enter grades

▸ TRACK EVERY ASSIGNMENT
Stay on top of your classes with organized grade tracking.

• Weighted categories — Exams 40%, Homework 30%, Labs 20%, Participation 10%
• Drop lowest grades — configure per category
• Extra credit support — calculate your real score
• Quick entry — add assignments in seconds

▸ WHAT DO I NEED?
Stop guessing what score you need on your final.

• Set your target grade — pick a letter or percentage
• See exactly what you need — on remaining assignments
• Know when it's impossible — no false hope, just math

▸ WIDGETS FOR YOUR HOME SCREEN
Check your GPA without opening the app.

• Small widget — current GPA at a glance
• Medium widget — GPA plus your lowest-graded course
• Large widget — all courses with current grades
• Lock screen — see your GPA instantly

▸ PRIVACY FIRST
Your grades are your business.

• iCloud sync only — through your personal Apple account
• No tracking — we don't collect analytics or location
• No ads — ever
• Offline-first — works without internet

▸ PRICING

FREE:
• 6 classes (a full semester for most students)
• Full credit-weighted GPA calculation
• All assignment tracking features
• iCloud sync across devices

PREMIUM SUBSCRIPTION

Sigma Premium is available with the following subscription options:

Premium Monthly: $4.99/month
Premium Annual: $29.99/year (Save 50%) — includes 7-day free trial

Premium unlocks:
• Unlimited classes and semesters
• Home screen and lock screen widgets
• Export to PDF and CSV
• Custom themes and app icons
• Priority support

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. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your App Store account settings after purchase.

Terms of Service: https://sigma.bulpara.com/terms
Privacy Policy: https://sigma.bulpara.com/privacy

---

Questions? support@bulpara.com