Sigma vs Statistics Solver + 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

Stuck on a statistics problem? Take a photo of it and Stat Solver works it out step by step, then lets you ask an AI tutor about any step you don't follow. Calculators, statistical tables, formula sheets and 60 practice levels are in the same app. PHOTO SOLVER • Photograph a problem from your textbook, worksheet or screen, or pick a photo from your gallery • Add a question of your own if you want something specific explained • Get a step-by-step solution: the given data, the formula, every calculation and the final answer • Works on probability, distributions, hypothesis tests, confidence intervals, regression and more AI STATISTICS TUTOR • Ask anything about statistics in plain words: what a p-value means, when to use a t-test, how to read a regression • The tutor answers in your language, with proper notation (μ, σ, χ²) • Your conversations are saved in your chat history STATISTICS CALCULATOR • Descriptive statistics from your data: mean, median, mode, standard deviation, variance, range, count, min and max • Probability: factorials, permutations and combinations • Distributions: normal, binomial, Poisson, Z-score, t, chi-square and F, with graphs TABLES AND FORMULAS • Standard normal (Z), t, chi-square, F, binomial and Poisson tables • Formula sheets with examples for descriptive statistics, probability, distributions, inference and regression PRACTICE FOR YOUR EXAM • 60 quiz levels, from beginner to advanced, with an explanation for every answer • Choose the topics you need: descriptive statistics, probability, distributions, inference, hypothesis testing, regression, correlation, sampling, experimental design and non-parametric tests • Earn XP as you move along your learning path SHARE YOUR RESULTS • Share a solution with a classmate or a study group in one tap PERFECT FOR • High school, AP and college statistics students • University courses in business, psychology, nursing, biology, economics and engineering • Anyone revising for a statistics exam or checking their homework HOW IT WORKS 1. Take a photo of the problem or choose one from your gallery 2. Read the step-by-step solution 3. Ask the tutor about any step 4. Practice with the quizzes and keep the tables and formulas at hand Stat Solver is available in 33 languages, with light and dark mode. Important: solutions and answers are generated by AI and can contain mistakes. Check them against your course material, and use Stat Solver to understand the method, not to replace your own work. PREMIUM SUBSCRIPTION REQUIRED Stat Solver is a paid app. Every feature described above - the photo solver, the AI tutor, the calculators, the tables, the formula sheets and the practice quizzes - is part of Stat Solver Premium and requires a purchase. There is no free version and no free scans. Premium is available as a weekly or annual auto-renewing subscription, or as a one-time lifetime purchase. The annual plan starts with a 7-day free trial: you are charged only if you do not cancel at least 24 hours before the trial ends. Prices are shown in the app before you buy. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Payment is charged to your Apple ID at confirmation of purchase, or when the free trial ends. Manage or cancel anytime in your Apple ID account settings. Privacy Policy: https://yorgisoft.vercel.app/#/privacy Terms Of Use: https://yorgisoft.vercel.app/#/terms Support: https://yorgisoft.vercel.app